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| author | Thomas Gleixner <tglx@linutronix.de> | 2012-03-07 02:18:54 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-03-07 04:46:39 +0400 |
| commit | 52abb700e16a9aa4cbc03f3d7f80206cbbc80680 (patch) | |
| tree | f396df08518ff22039d2c4da153cba029f01ecd2 /lib/string_helpers.c | |
| parent | ce8fea7aa4ad9e3b40999a08622ef27c77159659 (diff) | |
| download | linux-52abb700e16a9aa4cbc03f3d7f80206cbbc80680.tar.xz | |
genirq: Clear action->thread_mask if IRQ_ONESHOT is not set
Xommit ac5637611(genirq: Unmask oneshot irqs when thread was not woken)
fails to unmask when a !IRQ_ONESHOT threaded handler is handled by
handle_level_irq.
This happens because thread_mask is or'ed unconditionally in
irq_wake_thread(), but for !IRQ_ONESHOT interrupts never cleared. So
the check for !desc->thread_active fails and keeps the interrupt
disabled.
Keep the thread_mask zero for !IRQ_ONESHOT interrupts.
Document the thread_mask magic while at it.
Reported-and-tested-by: Sven Joachim <svenjoac@gmx.de>
Reported-and-tested-by: Stefan Lippers-Hollmann <s.l-h@gmx.de>
Cc: stable@vger.kernel.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib/string_helpers.c')
0 files changed, 0 insertions, 0 deletions