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authorLinus Torvalds <torvalds@linux-foundation.org>2011-03-25 20:50:12 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-03-25 20:50:12 -0700
commit24c6d02fe8c34bc958aa4c464efc1cc10d43e29d (patch)
tree65ead181d36f9113ca72fc2709e79bb560cfde22 /drivers
parent0dd61be7ec1be1b6820af978f901b9ae2c244dc6 (diff)
parenta0fa2206f550066d6948d43c5401e973e5f7d320 (diff)
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: Input: tsc2005 - fix locking issue Input: tsc2005 - use relative jiffies to schedule the watchdog Input: tsc2005 - driver should depend on GENERIC_HARDIRQS
Diffstat (limited to 'drivers')
-rw-r--r--drivers/input/touchscreen/Kconfig2
-rw-r--r--drivers/input/touchscreen/tsc2005.c18
2 files changed, 14 insertions, 6 deletions
diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index 112ec55f2939..434fd800cd24 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -641,7 +641,7 @@ config TOUCHSCREEN_TOUCHIT213
config TOUCHSCREEN_TSC2005
tristate "TSC2005 based touchscreens"
- depends on SPI_MASTER
+ depends on SPI_MASTER && GENERIC_HARDIRQS
help
Say Y here if you have a TSC2005 based touchscreen.
diff --git a/drivers/input/touchscreen/tsc2005.c b/drivers/input/touchscreen/tsc2005.c
index 87420616efa4..cbf0ff322676 100644
--- a/drivers/input/touchscreen/tsc2005.c
+++ b/drivers/input/touchscreen/tsc2005.c
@@ -358,7 +358,7 @@ static void __tsc2005_enable(struct tsc2005 *ts)
if (ts->esd_timeout && ts->set_reset) {
ts->last_valid_interrupt = jiffies;
schedule_delayed_work(&ts->esd_work,
- round_jiffies(jiffies +
+ round_jiffies_relative(
msecs_to_jiffies(ts->esd_timeout)));
}
@@ -477,7 +477,14 @@ static void tsc2005_esd_work(struct work_struct *work)
int error;
u16 r;
- mutex_lock(&ts->mutex);
+ if (!mutex_trylock(&ts->mutex)) {
+ /*
+ * If the mutex is taken, it means that disable or enable is in
+ * progress. In that case just reschedule the work. If the work
+ * is not needed, it will be canceled by disable.
+ */
+ goto reschedule;
+ }
if (time_is_after_jiffies(ts->last_valid_interrupt +
msecs_to_jiffies(ts->esd_timeout)))
@@ -510,11 +517,12 @@ static void tsc2005_esd_work(struct work_struct *work)
tsc2005_start_scan(ts);
out:
+ mutex_unlock(&ts->mutex);
+reschedule:
/* re-arm the watchdog */
schedule_delayed_work(&ts->esd_work,
- round_jiffies(jiffies +
+ round_jiffies_relative(
msecs_to_jiffies(ts->esd_timeout)));
- mutex_unlock(&ts->mutex);
}
static int tsc2005_open(struct input_dev *input)
@@ -663,7 +671,7 @@ static int __devinit tsc2005_probe(struct spi_device *spi)
goto err_remove_sysfs;
}
- set_irq_wake(spi->irq, 1);
+ irq_set_irq_wake(spi->irq, 1);
return 0;
err_remove_sysfs: