Messages in this thread Patch in this message | | | From | Bryan Wu <> | Subject | [PATCH 1/1] input: AD7877 driver fixup | Date | Thu, 30 Oct 2008 17:46:50 +0800 |
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From: Michael Hennerich <michael.hennerich@analog.com>
- Test flag with spinlock hold
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org> --- drivers/input/touchscreen/ad7877.c | 20 ++++++++++++-------- 1 files changed, 12 insertions(+), 8 deletions(-)
diff --git a/drivers/input/touchscreen/ad7877.c b/drivers/input/touchscreen/ad7877.c index aaf88c9..6615bcd 100644 --- a/drivers/input/touchscreen/ad7877.c +++ b/drivers/input/touchscreen/ad7877.c @@ -388,10 +388,11 @@ static irqreturn_t ad7877_irq(int irq, void *handle) * doesn't get issued twice while in work. */ - if (ts->pending) - return IRQ_HANDLED; - spin_lock_irqsave(&ts->lock, flags); + if (ts->pending) { + spin_unlock_irqrestore(&ts->lock, flags); + return IRQ_HANDLED; + } ts->pending = 1; spin_unlock_irqrestore(&ts->lock, flags); @@ -420,10 +421,12 @@ static void ad7877_disable(struct ad7877 *ts) { unsigned long flags; - if (ts->disabled) + spin_lock_irqsave(&ts->lock, flags); + if (ts->disabled) { + spin_unlock_irqrestore(&ts->lock, flags); return; + } - spin_lock_irqsave(&ts->lock, flags); ts->disabled = 1; disable_irq(ts->spi->irq); spin_unlock_irqrestore(&ts->lock, flags); @@ -443,10 +446,11 @@ static void ad7877_enable(struct ad7877 *ts) { unsigned long flags; - if (!ts->disabled) - return; - spin_lock_irqsave(&ts->lock, flags); + if (ts->disabled) { + spin_unlock_irqrestore(&ts->lock, flags); + return; + } ts->disabled = 0; enable_irq(ts->spi->irq); spin_unlock_irqrestore(&ts->lock, flags); -- 1.5.6
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