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[PATCH] fix deadlock in drivers/pci/msi.c

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The lock validator caught another one: drivers/pci/msi.c is accessing
&irq_desc[i].lock with interrupts enabled (!).

The fix is to disable interrupts properly.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Ingo Molnar 2006-01-26 01:42:11 +01:00 committed by Linus Torvalds
parent 4021cb279a
commit f6bc2666ed
1 changed files with 4 additions and 2 deletions
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6
drivers/pci/msi.c
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@ -416,7 +416,9 @@ static void attach_msi_entry(struct msi_desc *entry, int vector)
static void irq_handler_init(int cap_id, int pos, int mask)
{
spin_lock(&irq_desc[pos].lock);
unsigned long flags;
spin_lock_irqsave(&irq_desc[pos].lock, flags);
if (cap_id == PCI_CAP_ID_MSIX)
irq_desc[pos].handler = &msix_irq_type;
else {
@ -425,7 +427,7 @@ static void irq_handler_init(int cap_id, int pos, int mask)
else
irq_desc[pos].handler = &msi_irq_w_maskbit_type;
}
spin_unlock(&irq_desc[pos].lock);
spin_unlock_irqrestore(&irq_desc[pos].lock, flags);
}
static void enable_msi_mode(struct pci_dev *dev, int pos, int type)