diff options
| author | Tony Lindgren <tony@atomide.com> | 2011-02-25 12:27:14 -0800 |
|---|---|---|
| committer | Tony Lindgren <tony@atomide.com> | 2011-02-25 12:27:14 -0800 |
| commit | 02fa9f0451ac639a687bfc145eefe58703ff220e (patch) | |
| tree | fe984acc78f22f6eb8fb98efaba8b1ac2f3ad8d9 /kernel/irq/migration.c | |
| parent | cbc9438075ca9dee3f39a2e7310f81c304b40359 (diff) | |
| parent | 51c404b2c514930e98e81e0b9294f19892a4f871 (diff) | |
Merge branch 'patches_for_2.6.38rc' of git://git.pwsan.com/linux-2.6 into devel-fixes
Diffstat (limited to 'kernel/irq/migration.c')
| -rw-r--r-- | kernel/irq/migration.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/kernel/irq/migration.c b/kernel/irq/migration.c index 1d254194048..441fd629ff0 100644 --- a/kernel/irq/migration.c +++ b/kernel/irq/migration.c @@ -56,6 +56,7 @@ void move_masked_irq(int irq) void move_native_irq(int irq) { struct irq_desc *desc = irq_to_desc(irq); + bool masked; if (likely(!(desc->status & IRQ_MOVE_PENDING))) return; @@ -63,8 +64,15 @@ void move_native_irq(int irq) if (unlikely(desc->status & IRQ_DISABLED)) return; - desc->irq_data.chip->irq_mask(&desc->irq_data); + /* + * Be careful vs. already masked interrupts. If this is a + * threaded interrupt with ONESHOT set, we can end up with an + * interrupt storm. + */ + masked = desc->status & IRQ_MASKED; + if (!masked) + desc->irq_data.chip->irq_mask(&desc->irq_data); move_masked_irq(irq); - desc->irq_data.chip->irq_unmask(&desc->irq_data); + if (!masked) + desc->irq_data.chip->irq_unmask(&desc->irq_data); } - |