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pcmcia: cdev lock_kernel() pushdown

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Signed-off-by: Jonathan Corbet <corbet@lwn.net>
This commit is contained in:
Jonathan Corbet 2008-05-15 09:25:03 -06:00
parent 0911810755
commit 0bec0bba7a
1 changed files with 18 additions and 7 deletions
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25
drivers/pcmcia/pcmcia_ioctl.c
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@ -27,6 +27,7 @@
#include <linux/proc_fs.h>
#include <linux/poll.h>
#include <linux/pci.h>
#include <linux/smp_lock.h>
#include <linux/workqueue.h>
#define IN_CARD_SERVICES
@ -397,20 +398,27 @@ static int ds_open(struct inode *inode, struct file *file)
struct pcmcia_socket *s;
user_info_t *user;
static int warning_printed = 0;
int ret = 0;
ds_dbg(0, "ds_open(socket %d)\n", i);
lock_kernel();
s = pcmcia_get_socket_by_nr(i);
if (!s)
return -ENODEV;
if (!s) {
ret = -ENODEV;
goto out;
}
s = pcmcia_get_socket(s);
if (!s)
return -ENODEV;
if (!s) {
ret = -ENODEV;
goto out;
}
if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
if (s->pcmcia_state.busy) {
pcmcia_put_socket(s);
return -EBUSY;
ret = -EBUSY;
goto out;
}
else
s->pcmcia_state.busy = 1;
@ -419,7 +427,8 @@ static int ds_open(struct inode *inode, struct file *file)
user = kmalloc(sizeof(user_info_t), GFP_KERNEL);
if (!user) {
pcmcia_put_socket(s);
return -ENOMEM;
ret = -ENOMEM;
goto out;
}
user->event_tail = user->event_head = 0;
user->next = s->user;
@ -441,7 +450,9 @@ static int ds_open(struct inode *inode, struct file *file)
if (s->pcmcia_state.present)
queue_event(user, CS_EVENT_CARD_INSERTION);
return 0;
out:
unlock_kernel();
return ret;
} /* ds_open */
/*====================================================================*/