redonkable/remarkable-linux
redonkable/remarkable-linux
1
0
Fork 0
Code Releases Activity

[PATCH] Check the irq number is within bounds

Browse source 
Most of the functions already check. Do the ones that didn't.

Signed-off-by: Matthew Wilcox <matthew@wil.cx>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Matthew Wilcox 2005-11-03 07:51:18 -07:00 committed by Linus Torvalds
parent 2d0ebb3603
commit c2b5a251b9
1 changed files with 15 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

15
kernel/irq/manage.c
View file

@ -36,6 +36,9 @@ void synchronize_irq(unsigned int irq)
{ {
struct irq_desc *desc = irq_desc + irq; struct irq_desc *desc = irq_desc + irq;
if (irq >= NR_IRQS)
return;
while (desc->status & IRQ_INPROGRESS) while (desc->status & IRQ_INPROGRESS)
cpu_relax(); cpu_relax();
} }
@ -60,6 +63,9 @@ void disable_irq_nosync(unsigned int irq)
irq_desc_t *desc = irq_desc + irq; irq_desc_t *desc = irq_desc + irq;
unsigned long flags; unsigned long flags;
if (irq >= NR_IRQS)
return;
spin_lock_irqsave(&desc->lock, flags); spin_lock_irqsave(&desc->lock, flags);
if (!desc->depth++) { if (!desc->depth++) {
desc->status |= IRQ_DISABLED; desc->status |= IRQ_DISABLED;
@ -86,6 +92,9 @@ void disable_irq(unsigned int irq)
{ {
irq_desc_t *desc = irq_desc + irq; irq_desc_t *desc = irq_desc + irq;
if (irq >= NR_IRQS)
return;
disable_irq_nosync(irq); disable_irq_nosync(irq);
if (desc->action) if (desc->action)
synchronize_irq(irq); synchronize_irq(irq);
@ -108,6 +117,9 @@ void enable_irq(unsigned int irq)
irq_desc_t *desc = irq_desc + irq; irq_desc_t *desc = irq_desc + irq;
unsigned long flags; unsigned long flags;
if (irq >= NR_IRQS)
return;
spin_lock_irqsave(&desc->lock, flags); spin_lock_irqsave(&desc->lock, flags);
switch (desc->depth) { switch (desc->depth) {
case 0: case 0:
@ -163,6 +175,9 @@ int setup_irq(unsigned int irq, struct irqaction * new)
unsigned long flags; unsigned long flags;
int shared = 0; int shared = 0;
if (irq >= NR_IRQS)
return -EINVAL;
if (desc->handler == &no_irq_type) if (desc->handler == &no_irq_type)
return -ENOSYS; return -ENOSYS;
/* /*