[OPENPROM]: Rewrite driver to use in-kernel device tree.
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
parent
3d824a46b7
commit
8e48aec714
1 changed files with 357 additions and 278 deletions
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@ -29,8 +29,6 @@
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#define PROMLIB_INTERNAL
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#include <linux/config.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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@ -39,10 +37,10 @@
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#include <linux/slab.h>
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#include <linux/string.h>
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#include <linux/miscdevice.h>
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#include <linux/smp_lock.h>
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#include <linux/init.h>
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#include <linux/fs.h>
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#include <asm/oplib.h>
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#include <asm/prom.h>
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#include <asm/system.h>
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#include <asm/uaccess.h>
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#include <asm/openpromio.h>
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@ -51,15 +49,20 @@
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#include <asm/pbm.h>
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#endif
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MODULE_AUTHOR("Thomas K. Dyas (tdyas@noc.rutgers.edu) and Eddie C. Dost (ecd@skynet.be)");
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MODULE_DESCRIPTION("OPENPROM Configuration Driver");
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MODULE_LICENSE("GPL");
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MODULE_VERSION("1.0");
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/* Private data kept by the driver for each descriptor. */
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typedef struct openprom_private_data
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{
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int current_node; /* Current node for SunOS ioctls. */
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int lastnode; /* Last valid node used by BSD ioctls. */
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struct device_node *current_node; /* Current node for SunOS ioctls. */
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struct device_node *lastnode; /* Last valid node used by BSD ioctls. */
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} DATA;
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/* ID of the PROM node containing all of the EEPROM options. */
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static int options_node = 0;
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static struct device_node *options_node;
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/*
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* Copy an openpromio structure into kernel space from user space.
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@ -87,9 +90,8 @@ static int copyin(struct openpromio __user *info, struct openpromio **opp_p)
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if (bufsize > OPROMMAXPARAM)
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bufsize = OPROMMAXPARAM;
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if (!(*opp_p = kmalloc(sizeof(int) + bufsize + 1, GFP_KERNEL)))
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if (!(*opp_p = kzalloc(sizeof(int) + bufsize + 1, GFP_KERNEL)))
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return -ENOMEM;
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memset(*opp_p, 0, sizeof(int) + bufsize + 1);
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if (copy_from_user(&(*opp_p)->oprom_array,
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&info->oprom_array, bufsize)) {
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@ -107,10 +109,9 @@ static int getstrings(struct openpromio __user *info, struct openpromio **opp_p)
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if (!info || !opp_p)
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return -EFAULT;
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if (!(*opp_p = kmalloc(sizeof(int) + OPROMMAXPARAM + 1, GFP_KERNEL)))
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if (!(*opp_p = kzalloc(sizeof(int) + OPROMMAXPARAM + 1, GFP_KERNEL)))
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return -ENOMEM;
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memset(*opp_p, 0, sizeof(int) + OPROMMAXPARAM + 1);
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(*opp_p)->oprom_size = 0;
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n = bufsize = 0;
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@ -140,16 +141,164 @@ static int copyout(void __user *info, struct openpromio *opp, int len)
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return 0;
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}
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static int opromgetprop(void __user *argp, struct device_node *dp, struct openpromio *op, int bufsize)
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{
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void *pval;
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int len;
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pval = of_get_property(dp, op->oprom_array, &len);
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if (!pval || len <= 0 || len > bufsize)
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return copyout(argp, op, sizeof(int));
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memcpy(op->oprom_array, pval, len);
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op->oprom_array[len] = '\0';
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op->oprom_size = len;
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return copyout(argp, op, sizeof(int) + bufsize);
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}
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static int opromnxtprop(void __user *argp, struct device_node *dp, struct openpromio *op, int bufsize)
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{
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struct property *prop;
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int len;
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if (op->oprom_array[0] == '\0') {
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prop = dp->properties;
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if (!prop)
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return copyout(argp, op, sizeof(int));
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len = strlen(prop->name);
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} else {
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prop = of_find_property(dp, op->oprom_array, NULL);
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if (!prop ||
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!prop->next ||
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(len = strlen(prop->next->name)) + 1 > bufsize)
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return copyout(argp, op, sizeof(int));
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prop = prop->next;
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}
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memcpy(op->oprom_array, prop->name, len);
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op->oprom_array[len] = '\0';
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op->oprom_size = ++len;
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return copyout(argp, op, sizeof(int) + bufsize);
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}
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static int opromsetopt(struct device_node *dp, struct openpromio *op, int bufsize)
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{
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char *buf = op->oprom_array + strlen(op->oprom_array) + 1;
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int len = op->oprom_array + bufsize - buf;
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return of_set_property(options_node, op->oprom_array, buf, len);
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}
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static int opromnext(void __user *argp, unsigned int cmd, struct device_node *dp, struct openpromio *op, int bufsize, DATA *data)
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{
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phandle ph;
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BUILD_BUG_ON(sizeof(phandle) != sizeof(int));
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if (bufsize < sizeof(phandle))
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return -EINVAL;
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ph = *((int *) op->oprom_array);
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if (ph) {
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dp = of_find_node_by_phandle(ph);
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if (!dp)
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return -EINVAL;
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switch (cmd) {
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case OPROMNEXT:
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dp = dp->sibling;
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break;
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case OPROMCHILD:
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dp = dp->child;
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break;
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case OPROMSETCUR:
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default:
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break;
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};
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} else {
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/* Sibling of node zero is the root node. */
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if (cmd != OPROMNEXT)
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return -EINVAL;
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dp = of_find_node_by_path("/");
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}
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ph = 0;
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if (dp)
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ph = dp->node;
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data->current_node = dp;
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*((int *) op->oprom_array) = ph;
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op->oprom_size = sizeof(phandle);
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return copyout(argp, op, bufsize + sizeof(int));
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}
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static int oprompci2node(void __user *argp, struct device_node *dp, struct openpromio *op, int bufsize, DATA *data)
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{
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int err = -EINVAL;
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if (bufsize >= 2*sizeof(int)) {
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#ifdef CONFIG_PCI
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struct pci_dev *pdev;
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struct pcidev_cookie *pcp;
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pdev = pci_find_slot (((int *) op->oprom_array)[0],
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((int *) op->oprom_array)[1]);
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pcp = pdev->sysdata;
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if (pcp != NULL) {
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dp = pcp->prom_node;
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data->current_node = dp;
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*((int *)op->oprom_array) = dp->node;
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op->oprom_size = sizeof(int);
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err = copyout(argp, op, bufsize + sizeof(int));
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}
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#endif
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}
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return err;
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}
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static int oprompath2node(void __user *argp, struct device_node *dp, struct openpromio *op, int bufsize, DATA *data)
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{
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dp = of_find_node_by_path(op->oprom_array);
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data->current_node = dp;
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*((int *)op->oprom_array) = dp->node;
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op->oprom_size = sizeof(int);
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return copyout(argp, op, bufsize + sizeof(int));
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}
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static int opromgetbootargs(void __user *argp, struct openpromio *op, int bufsize)
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{
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char *buf = saved_command_line;
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int len = strlen(buf);
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if (len > bufsize)
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return -EINVAL;
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strcpy(op->oprom_array, buf);
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op->oprom_size = len;
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return copyout(argp, op, bufsize + sizeof(int));
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}
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/*
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* SunOS and Solaris /dev/openprom ioctl calls.
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*/
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static int openprom_sunos_ioctl(struct inode * inode, struct file * file,
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unsigned int cmd, unsigned long arg, int node)
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unsigned int cmd, unsigned long arg,
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struct device_node *dp)
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{
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DATA *data = (DATA *) file->private_data;
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char buffer[OPROMMAXPARAM+1], *buf;
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DATA *data = file->private_data;
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struct openpromio *opp;
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int bufsize, len, error = 0;
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int bufsize, error = 0;
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static int cnt;
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void __user *argp = (void __user *)arg;
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@ -164,119 +313,35 @@ static int openprom_sunos_ioctl(struct inode * inode, struct file * file,
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switch (cmd) {
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case OPROMGETOPT:
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case OPROMGETPROP:
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len = prom_getproplen(node, opp->oprom_array);
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if (len <= 0 || len > bufsize) {
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error = copyout(argp, opp, sizeof(int));
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break;
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}
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len = prom_getproperty(node, opp->oprom_array, buffer, bufsize);
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memcpy(opp->oprom_array, buffer, len);
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opp->oprom_array[len] = '\0';
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opp->oprom_size = len;
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error = copyout(argp, opp, sizeof(int) + bufsize);
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error = opromgetprop(argp, dp, opp, bufsize);
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break;
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case OPROMNXTOPT:
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case OPROMNXTPROP:
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buf = prom_nextprop(node, opp->oprom_array, buffer);
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len = strlen(buf);
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if (len == 0 || len + 1 > bufsize) {
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error = copyout(argp, opp, sizeof(int));
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break;
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}
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memcpy(opp->oprom_array, buf, len);
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opp->oprom_array[len] = '\0';
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opp->oprom_size = ++len;
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error = copyout(argp, opp, sizeof(int) + bufsize);
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error = opromnxtprop(argp, dp, opp, bufsize);
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break;
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case OPROMSETOPT:
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case OPROMSETOPT2:
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buf = opp->oprom_array + strlen(opp->oprom_array) + 1;
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len = opp->oprom_array + bufsize - buf;
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error = prom_setprop(options_node, opp->oprom_array,
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buf, len);
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if (error < 0)
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error = -EINVAL;
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error = opromsetopt(dp, opp, bufsize);
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break;
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case OPROMNEXT:
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case OPROMCHILD:
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case OPROMSETCUR:
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if (bufsize < sizeof(int)) {
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error = -EINVAL;
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break;
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}
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node = *((int *) opp->oprom_array);
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switch (cmd) {
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case OPROMNEXT: node = __prom_getsibling(node); break;
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case OPROMCHILD: node = __prom_getchild(node); break;
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case OPROMSETCUR: break;
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}
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data->current_node = node;
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*((int *)opp->oprom_array) = node;
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opp->oprom_size = sizeof(int);
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error = copyout(argp, opp, bufsize + sizeof(int));
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error = opromnext(argp, cmd, dp, opp, bufsize, data);
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break;
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case OPROMPCI2NODE:
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error = -EINVAL;
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if (bufsize >= 2*sizeof(int)) {
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#ifdef CONFIG_PCI
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struct pci_dev *pdev;
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struct pcidev_cookie *pcp;
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pdev = pci_find_slot (((int *) opp->oprom_array)[0],
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((int *) opp->oprom_array)[1]);
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pcp = pdev->sysdata;
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if (pcp != NULL) {
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node = pcp->prom_node->node;
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data->current_node = node;
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*((int *)opp->oprom_array) = node;
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opp->oprom_size = sizeof(int);
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error = copyout(argp, opp, bufsize + sizeof(int));
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}
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#endif
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}
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error = oprompci2node(argp, dp, opp, bufsize, data);
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break;
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case OPROMPATH2NODE:
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node = prom_finddevice(opp->oprom_array);
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data->current_node = node;
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*((int *)opp->oprom_array) = node;
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opp->oprom_size = sizeof(int);
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error = copyout(argp, opp, bufsize + sizeof(int));
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error = oprompath2node(argp, dp, opp, bufsize, data);
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break;
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case OPROMGETBOOTARGS:
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buf = saved_command_line;
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len = strlen(buf);
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if (len > bufsize) {
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error = -EINVAL;
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break;
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}
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strcpy(opp->oprom_array, buf);
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opp->oprom_size = len;
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error = copyout(argp, opp, bufsize + sizeof(int));
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error = opromgetbootargs(argp, opp, bufsize);
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break;
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case OPROMU2P:
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@ -297,25 +362,14 @@ static int openprom_sunos_ioctl(struct inode * inode, struct file * file,
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return error;
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}
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/* Return nonzero if a specific node is in the PROM device tree. */
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static int intree(int root, int node)
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static struct device_node *get_node(phandle n, DATA *data)
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{
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for (; root != 0; root = prom_getsibling(root))
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if (root == node || intree(prom_getchild(root),node))
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return 1;
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return 0;
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}
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struct device_node *dp = of_find_node_by_phandle(n);
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/* Return nonzero if a specific node is "valid". */
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static int goodnode(int n, DATA *data)
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{
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if (n == data->lastnode || n == prom_root_node || n == options_node)
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return 1;
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if (n == 0 || n == -1 || !intree(prom_root_node,n))
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return 0;
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data->lastnode = n;
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return 1;
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if (dp)
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data->lastnode = dp;
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return dp;
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}
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/* Copy in a whole string from userspace into kernelspace. */
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@ -330,7 +384,7 @@ static int copyin_string(char __user *user, size_t len, char **ptr)
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if (!tmp)
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return -ENOMEM;
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if(copy_from_user(tmp, user, len)) {
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if (copy_from_user(tmp, user, len)) {
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kfree(tmp);
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return -EFAULT;
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}
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@ -345,162 +399,187 @@ static int copyin_string(char __user *user, size_t len, char **ptr)
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/*
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* NetBSD /dev/openprom ioctl calls.
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*/
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static int opiocget(void __user *argp, DATA *data)
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{
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struct opiocdesc op;
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struct device_node *dp;
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char *str;
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void *pval;
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int err, len;
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if (copy_from_user(&op, argp, sizeof(op)))
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return -EFAULT;
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dp = get_node(op.op_nodeid, data);
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err = copyin_string(op.op_name, op.op_namelen, &str);
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if (err)
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return err;
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pval = of_get_property(dp, str, &len);
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err = 0;
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if (!pval || len > op.op_buflen) {
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err = -EINVAL;
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} else {
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op.op_buflen = len;
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if (copy_to_user(argp, &op, sizeof(op)) ||
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copy_to_user(op.op_buf, pval, len))
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err = -EFAULT;
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}
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kfree(str);
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return err;
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}
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static int opiocnextprop(void __user *argp, DATA *data)
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{
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struct opiocdesc op;
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struct device_node *dp;
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struct property *prop;
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char *str;
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int err, len;
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if (copy_from_user(&op, argp, sizeof(op)))
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return -EFAULT;
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dp = get_node(op.op_nodeid, data);
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if (!dp)
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return -EINVAL;
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err = copyin_string(op.op_name, op.op_namelen, &str);
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if (err)
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return err;
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if (str[0] == '\0') {
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prop = dp->properties;
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} else {
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prop = of_find_property(dp, str, NULL);
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if (prop)
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prop = prop->next;
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}
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kfree(str);
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if (!prop)
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len = 0;
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else
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len = prop->length;
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if (len > op.op_buflen)
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len = op.op_buflen;
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if (copy_to_user(argp, &op, sizeof(op)))
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return -EFAULT;
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if (len &&
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copy_to_user(op.op_buf, prop->value, len))
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return -EFAULT;
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return 0;
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}
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|
||||
static int opiocset(void __user *argp, DATA *data)
|
||||
{
|
||||
struct opiocdesc op;
|
||||
struct device_node *dp;
|
||||
char *str, *tmp;
|
||||
int err;
|
||||
|
||||
if (copy_from_user(&op, argp, sizeof(op)))
|
||||
return -EFAULT;
|
||||
|
||||
dp = get_node(op.op_nodeid, data);
|
||||
if (!dp)
|
||||
return -EINVAL;
|
||||
|
||||
err = copyin_string(op.op_name, op.op_namelen, &str);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
err = copyin_string(op.op_buf, op.op_buflen, &tmp);
|
||||
if (err) {
|
||||
kfree(str);
|
||||
return err;
|
||||
}
|
||||
|
||||
err = of_set_property(dp, str, tmp, op.op_buflen);
|
||||
|
||||
kfree(str);
|
||||
kfree(tmp);
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
static int opiocgetnext(unsigned int cmd, void __user *argp)
|
||||
{
|
||||
struct device_node *dp;
|
||||
phandle nd;
|
||||
|
||||
BUILD_BUG_ON(sizeof(phandle) != sizeof(int));
|
||||
|
||||
if (copy_from_user(&nd, argp, sizeof(phandle)))
|
||||
return -EFAULT;
|
||||
|
||||
if (nd == 0) {
|
||||
if (cmd != OPIOCGETNEXT)
|
||||
return -EINVAL;
|
||||
dp = of_find_node_by_path("/");
|
||||
} else {
|
||||
dp = of_find_node_by_phandle(nd);
|
||||
nd = 0;
|
||||
if (dp) {
|
||||
if (cmd == OPIOCGETNEXT)
|
||||
dp = dp->sibling;
|
||||
else
|
||||
dp = dp->child;
|
||||
}
|
||||
}
|
||||
if (dp)
|
||||
nd = dp->node;
|
||||
if (copy_to_user(argp, &nd, sizeof(phandle)))
|
||||
return -EFAULT;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int openprom_bsd_ioctl(struct inode * inode, struct file * file,
|
||||
unsigned int cmd, unsigned long arg)
|
||||
{
|
||||
DATA *data = (DATA *) file->private_data;
|
||||
void __user *argp = (void __user *)arg;
|
||||
struct opiocdesc op;
|
||||
int error, node, len;
|
||||
char *str, *tmp;
|
||||
char buffer[64];
|
||||
static int cnt;
|
||||
int err;
|
||||
|
||||
switch (cmd) {
|
||||
case OPIOCGET:
|
||||
if (copy_from_user(&op, argp, sizeof(op)))
|
||||
return -EFAULT;
|
||||
|
||||
if (!goodnode(op.op_nodeid,data))
|
||||
return -EINVAL;
|
||||
|
||||
error = copyin_string(op.op_name, op.op_namelen, &str);
|
||||
if (error)
|
||||
return error;
|
||||
|
||||
len = prom_getproplen(op.op_nodeid,str);
|
||||
|
||||
if (len > op.op_buflen) {
|
||||
kfree(str);
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
op.op_buflen = len;
|
||||
|
||||
if (len <= 0) {
|
||||
kfree(str);
|
||||
/* Verified by the above copy_from_user */
|
||||
if (__copy_to_user(argp, &op,
|
||||
sizeof(op)))
|
||||
return -EFAULT;
|
||||
return 0;
|
||||
}
|
||||
|
||||
tmp = kmalloc(len + 1, GFP_KERNEL);
|
||||
if (!tmp) {
|
||||
kfree(str);
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
cnt = prom_getproperty(op.op_nodeid, str, tmp, len);
|
||||
if (cnt <= 0) {
|
||||
error = -EINVAL;
|
||||
} else {
|
||||
tmp[len] = '\0';
|
||||
|
||||
if (__copy_to_user(argp, &op, sizeof(op)) != 0 ||
|
||||
copy_to_user(op.op_buf, tmp, len) != 0)
|
||||
error = -EFAULT;
|
||||
}
|
||||
|
||||
kfree(tmp);
|
||||
kfree(str);
|
||||
|
||||
return error;
|
||||
err = opiocget(argp, data);
|
||||
break;
|
||||
|
||||
case OPIOCNEXTPROP:
|
||||
if (copy_from_user(&op, argp, sizeof(op)))
|
||||
return -EFAULT;
|
||||
|
||||
if (!goodnode(op.op_nodeid,data))
|
||||
return -EINVAL;
|
||||
|
||||
error = copyin_string(op.op_name, op.op_namelen, &str);
|
||||
if (error)
|
||||
return error;
|
||||
|
||||
tmp = prom_nextprop(op.op_nodeid,str,buffer);
|
||||
|
||||
if (tmp) {
|
||||
len = strlen(tmp);
|
||||
if (len > op.op_buflen)
|
||||
len = op.op_buflen;
|
||||
else
|
||||
op.op_buflen = len;
|
||||
} else {
|
||||
len = op.op_buflen = 0;
|
||||
}
|
||||
|
||||
if (!access_ok(VERIFY_WRITE, argp, sizeof(op))) {
|
||||
kfree(str);
|
||||
return -EFAULT;
|
||||
}
|
||||
|
||||
if (!access_ok(VERIFY_WRITE, op.op_buf, len)) {
|
||||
kfree(str);
|
||||
return -EFAULT;
|
||||
}
|
||||
|
||||
error = __copy_to_user(argp, &op, sizeof(op));
|
||||
if (!error) error = __copy_to_user(op.op_buf, tmp, len);
|
||||
|
||||
kfree(str);
|
||||
|
||||
return error;
|
||||
err = opiocnextprop(argp, data);
|
||||
break;
|
||||
|
||||
case OPIOCSET:
|
||||
if (copy_from_user(&op, argp, sizeof(op)))
|
||||
return -EFAULT;
|
||||
|
||||
if (!goodnode(op.op_nodeid,data))
|
||||
return -EINVAL;
|
||||
|
||||
error = copyin_string(op.op_name, op.op_namelen, &str);
|
||||
if (error)
|
||||
return error;
|
||||
|
||||
error = copyin_string(op.op_buf, op.op_buflen, &tmp);
|
||||
if (error) {
|
||||
kfree(str);
|
||||
return error;
|
||||
}
|
||||
|
||||
len = prom_setprop(op.op_nodeid,str,tmp,op.op_buflen+1);
|
||||
|
||||
if (len != op.op_buflen)
|
||||
return -EINVAL;
|
||||
|
||||
kfree(str);
|
||||
kfree(tmp);
|
||||
|
||||
return 0;
|
||||
err = opiocset(argp, data);
|
||||
break;
|
||||
|
||||
case OPIOCGETOPTNODE:
|
||||
if (copy_to_user(argp, &options_node, sizeof(int)))
|
||||
BUILD_BUG_ON(sizeof(phandle) != sizeof(int));
|
||||
|
||||
if (copy_to_user(argp, &options_node->node, sizeof(phandle)))
|
||||
return -EFAULT;
|
||||
|
||||
return 0;
|
||||
|
||||
case OPIOCGETNEXT:
|
||||
case OPIOCGETCHILD:
|
||||
if (copy_from_user(&node, argp, sizeof(int)))
|
||||
return -EFAULT;
|
||||
|
||||
if (cmd == OPIOCGETNEXT)
|
||||
node = __prom_getsibling(node);
|
||||
else
|
||||
node = __prom_getchild(node);
|
||||
|
||||
if (__copy_to_user(argp, &node, sizeof(int)))
|
||||
return -EFAULT;
|
||||
|
||||
return 0;
|
||||
err = opiocgetnext(cmd, argp);
|
||||
break;
|
||||
|
||||
default:
|
||||
if (cnt++ < 10)
|
||||
printk(KERN_INFO "openprom_bsd_ioctl: cmd 0x%X\n", cmd);
|
||||
return -EINVAL;
|
||||
|
||||
}
|
||||
};
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
|
||||
|
|
@ -511,7 +590,6 @@ static int openprom_ioctl(struct inode * inode, struct file * file,
|
|||
unsigned int cmd, unsigned long arg)
|
||||
{
|
||||
DATA *data = (DATA *) file->private_data;
|
||||
static int cnt;
|
||||
|
||||
switch (cmd) {
|
||||
case OPROMGETOPT:
|
||||
|
|
@ -563,10 +641,8 @@ static int openprom_ioctl(struct inode * inode, struct file * file,
|
|||
return openprom_bsd_ioctl(inode,file,cmd,arg);
|
||||
|
||||
default:
|
||||
if (cnt++ < 10)
|
||||
printk("openprom_ioctl: cmd 0x%X, arg 0x%lX\n", cmd, arg);
|
||||
return -EINVAL;
|
||||
}
|
||||
};
|
||||
}
|
||||
|
||||
static long openprom_compat_ioctl(struct file *file, unsigned int cmd,
|
||||
|
|
@ -594,9 +670,7 @@ static long openprom_compat_ioctl(struct file *file, unsigned int cmd,
|
|||
case OPROMSETCUR:
|
||||
case OPROMPCI2NODE:
|
||||
case OPROMPATH2NODE:
|
||||
lock_kernel();
|
||||
rval = openprom_ioctl(file->f_dentry->d_inode, file, cmd, arg);
|
||||
lock_kernel();
|
||||
break;
|
||||
}
|
||||
|
||||
|
|
@ -607,13 +681,13 @@ static int openprom_open(struct inode * inode, struct file * file)
|
|||
{
|
||||
DATA *data;
|
||||
|
||||
data = (DATA *) kmalloc(sizeof(DATA), GFP_KERNEL);
|
||||
data = kmalloc(sizeof(DATA), GFP_KERNEL);
|
||||
if (!data)
|
||||
return -ENOMEM;
|
||||
|
||||
data->current_node = prom_root_node;
|
||||
data->lastnode = prom_root_node;
|
||||
file->private_data = (void *)data;
|
||||
data->current_node = of_find_node_by_path("/");
|
||||
data->lastnode = data->current_node;
|
||||
file->private_data = (void *) data;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -634,24 +708,30 @@ static struct file_operations openprom_fops = {
|
|||
};
|
||||
|
||||
static struct miscdevice openprom_dev = {
|
||||
SUN_OPENPROM_MINOR, "openprom", &openprom_fops
|
||||
.minor = SUN_OPENPROM_MINOR,
|
||||
.name = "openprom",
|
||||
.fops = &openprom_fops,
|
||||
};
|
||||
|
||||
static int __init openprom_init(void)
|
||||
{
|
||||
int error;
|
||||
struct device_node *dp;
|
||||
int err;
|
||||
|
||||
error = misc_register(&openprom_dev);
|
||||
if (error) {
|
||||
printk(KERN_ERR "openprom: unable to get misc minor\n");
|
||||
return error;
|
||||
err = misc_register(&openprom_dev);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
dp = of_find_node_by_path("/");
|
||||
dp = dp->child;
|
||||
while (dp) {
|
||||
if (!strcmp(dp->name, "options"))
|
||||
break;
|
||||
dp = dp->sibling;
|
||||
}
|
||||
options_node = dp;
|
||||
|
||||
options_node = prom_getchild(prom_root_node);
|
||||
options_node = prom_searchsiblings(options_node,"options");
|
||||
|
||||
if (options_node == 0 || options_node == -1) {
|
||||
printk(KERN_ERR "openprom: unable to find options node\n");
|
||||
if (!options_node) {
|
||||
misc_deregister(&openprom_dev);
|
||||
return -EIO;
|
||||
}
|
||||
|
|
@ -666,4 +746,3 @@ static void __exit openprom_cleanup(void)
|
|||
|
||||
module_init(openprom_init);
|
||||
module_exit(openprom_cleanup);
|
||||
MODULE_LICENSE("GPL");
|
||||
|
|
|
|||
Loading…
Reference in a new issue