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| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2006-08-31 21:27:50 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-09-01 11:39:09 -0700 |
| commit | ca72945d2d0981299035bd9d40a08ff06e74b5b8 (patch) | |
| tree | eb9f64c29bdebb17a686501dc54cb222072f0363 /arch | |
| parent | d565dd3b0824b67a8442df4de83cc44f7c726fc9 (diff) | |
| download | linux-ca72945d2d0981299035bd9d40a08ff06e74b5b8.tar.gz linux-ca72945d2d0981299035bd9d40a08ff06e74b5b8.tar.bz2 linux-ca72945d2d0981299035bd9d40a08ff06e74b5b8.zip | |
[PATCH] powerpc: Fix PowerMac IRQ handling bug
The port to genirq & the new powerpc interrupt model in 2.6.18 introduced a
bug in the legacy PowerMac PIC code (used on older machines) because of a
typo potentially causing hangs due to interrupt storms. This fixes it,
along with a performance issue causing us to do spurrious retriggers after
masking an interrupt.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/platforms/powermac/pic.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/powerpc/platforms/powermac/pic.c b/arch/powerpc/platforms/powermac/pic.c index 060789e31c67..39f7ddb554ea 100644 --- a/arch/powerpc/platforms/powermac/pic.c +++ b/arch/powerpc/platforms/powermac/pic.c @@ -87,8 +87,8 @@ static void __pmac_retrigger(unsigned int irq_nr) static void pmac_mask_and_ack_irq(unsigned int virq) { unsigned int src = irq_map[virq].hwirq; - unsigned long bit = 1UL << (virq & 0x1f); - int i = virq >> 5; + unsigned long bit = 1UL << (src & 0x1f); + int i = src >> 5; unsigned long flags; spin_lock_irqsave(&pmac_pic_lock, flags); @@ -175,7 +175,7 @@ static void pmac_mask_irq(unsigned int virq) spin_lock_irqsave(&pmac_pic_lock, flags); __clear_bit(src, ppc_cached_irq_mask); - __pmac_set_irq_mask(src, 0); + __pmac_set_irq_mask(src, 1); spin_unlock_irqrestore(&pmac_pic_lock, flags); } |