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PNP: remove null pointer checks

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Remove some null pointer checks.  Null pointers in these areas indicate
programming errors, and I think it's better to oops immediately rather
than return an error that is easily ignored.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Acked-by: Adam Belay <abelay@novell.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Bjorn Helgaas 2007-08-15 10:32:13 -06:00 committed by Len Brown
parent 4f0217e302
commit b173491339
5 changed files with 2 additions and 60 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

7
drivers/pnp/core.c
View file

@ -52,9 +52,6 @@ int pnp_register_protocol(struct pnp_protocol *protocol)
int nodenum;
struct list_head *pos;
if (!protocol)
return -EINVAL;
INIT_LIST_HEAD(&protocol->devices);
INIT_LIST_HEAD(&protocol->cards);
nodenum = 0;
@ -94,8 +91,6 @@ static void pnp_free_ids(struct pnp_dev *dev)
struct pnp_id *id;
struct pnp_id *next;
if (!dev)
return;
id = dev->id;
while (id) {
next = id->next;
@ -143,7 +138,7 @@ int __pnp_add_device(struct pnp_dev *dev)
*/
int pnp_add_device(struct pnp_dev *dev)
{
if (!dev || !dev->protocol || dev->card)
if (dev->card)
return -EINVAL;
dev->dev.parent = &dev->protocol->dev;
sprintf(dev->dev.bus_id, "%02x:%02x", dev->protocol->number,

4
drivers/pnp/driver.c
View file

@ -232,10 +232,6 @@ int pnp_add_id(struct pnp_id *id, struct pnp_dev *dev)
{
struct pnp_id *ptr;
if (!id)
return -EINVAL;
if (!dev)
return -EINVAL;
id->next = NULL;
ptr = dev->id;
while (ptr && ptr->next)

2
drivers/pnp/isapnp/core.c
View file

@ -1040,7 +1040,7 @@ static int isapnp_set_resources(struct pnp_dev *dev,
static int isapnp_disable_resources(struct pnp_dev *dev)
{
if (!dev || !dev->active)
if (!dev->active)
return -EINVAL;
isapnp_cfg_begin(dev->card->number, dev->number);
isapnp_deactivate(dev->number);

23
drivers/pnp/manager.c
View file

@ -21,9 +21,6 @@ static int pnp_assign_port(struct pnp_dev *dev, struct pnp_port *rule, int idx)
resource_size_t *start, *end;
unsigned long *flags;
if (!dev || !rule)
return -EINVAL;
if (idx >= PNP_MAX_PORT) {
pnp_err
("More than 4 ports is incompatible with pnp specifications.");
@ -66,9 +63,6 @@ static int pnp_assign_mem(struct pnp_dev *dev, struct pnp_mem *rule, int idx)
resource_size_t *start, *end;
unsigned long *flags;
if (!dev || !rule)
return -EINVAL;
if (idx >= PNP_MAX_MEM) {
pnp_err
("More than 8 mems is incompatible with pnp specifications.");
@ -127,9 +121,6 @@ static int pnp_assign_irq(struct pnp_dev *dev, struct pnp_irq *rule, int idx)
5, 10, 11, 12, 9, 14, 15, 7, 3, 4, 13, 0, 1, 6, 8, 2
};
if (!dev || !rule)
return -EINVAL;
if (idx >= PNP_MAX_IRQ) {
pnp_err
("More than 2 irqs is incompatible with pnp specifications.");
@ -181,9 +172,6 @@ static int pnp_assign_dma(struct pnp_dev *dev, struct pnp_dma *rule, int idx)
1, 3, 5, 6, 7, 0, 2, 4
};
if (!dev || !rule)
return -EINVAL;
if (idx >= PNP_MAX_DMA) {
pnp_err
("More than 2 dmas is incompatible with pnp specifications.");
@ -410,8 +398,6 @@ int pnp_manual_config_dev(struct pnp_dev *dev, struct pnp_resource_table *res,
int i;
struct pnp_resource_table *bak;
if (!dev || !res)
return -EINVAL;
if (!pnp_can_configure(dev))
return -ENODEV;
bak = pnp_alloc(sizeof(struct pnp_resource_table));
@ -460,9 +446,6 @@ int pnp_auto_config_dev(struct pnp_dev *dev)
struct pnp_option *dep;
int i = 1;
if (!dev)
return -EINVAL;
if (!pnp_can_configure(dev)) {
pnp_dbg("Device %s does not support resource configuration.",
dev->dev.bus_id);
@ -541,8 +524,6 @@ int pnp_activate_dev(struct pnp_dev *dev)
{
int error;
if (!dev)
return -EINVAL;
if (dev->active)
return 0; /* the device is already active */
@ -568,8 +549,6 @@ int pnp_disable_dev(struct pnp_dev *dev)
{
int error;
if (!dev)
return -EINVAL;
if (!dev->active)
return 0; /* the device is already disabled */
@ -596,8 +575,6 @@ int pnp_disable_dev(struct pnp_dev *dev)
void pnp_resource_change(struct resource *resource, resource_size_t start,
resource_size_t size)
{
if (resource == NULL)
return;
resource->flags &= ~(IORESOURCE_AUTO | IORESOURCE_UNSET);
resource->start = start;
resource->end = start + size - 1;

26
drivers/pnp/resource.c
View file

@ -47,9 +47,6 @@ struct pnp_option *pnp_register_independent_option(struct pnp_dev *dev)
{
struct pnp_option *option;
if (!dev)
return NULL;
option = pnp_build_option(PNP_RES_PRIORITY_PREFERRED);
/* this should never happen but if it does we'll try to continue */
@ -64,9 +61,6 @@ struct pnp_option *pnp_register_dependent_option(struct pnp_dev *dev,
{
struct pnp_option *option;
if (!dev)
return NULL;
option = pnp_build_option(priority);
if (dev->dependent) {
@ -83,11 +77,6 @@ int pnp_register_irq_resource(struct pnp_option *option, struct pnp_irq *data)
{
struct pnp_irq *ptr;
if (!option)
return -EINVAL;
if (!data)
return -EINVAL;
ptr = option->irq;
while (ptr && ptr->next)
ptr = ptr->next;
@ -112,11 +101,6 @@ int pnp_register_dma_resource(struct pnp_option *option, struct pnp_dma *data)
{
struct pnp_dma *ptr;
if (!option)
return -EINVAL;
if (!data)
return -EINVAL;
ptr = option->dma;
while (ptr && ptr->next)
ptr = ptr->next;
@ -132,11 +116,6 @@ int pnp_register_port_resource(struct pnp_option *option, struct pnp_port *data)
{
struct pnp_port *ptr;
if (!option)
return -EINVAL;
if (!data)
return -EINVAL;
ptr = option->port;
while (ptr && ptr->next)
ptr = ptr->next;
@ -152,11 +131,6 @@ int pnp_register_mem_resource(struct pnp_option *option, struct pnp_mem *data)
{
struct pnp_mem *ptr;
if (!option)
return -EINVAL;
if (!data)
return -EINVAL;
ptr = option->mem;
while (ptr && ptr->next)
ptr = ptr->next;