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iio: trigger: implement devm_iio_trigger_alloc/devm_iio_triger_free

Forráskód böngészése 
Add a resource managed devm_iio_trigger_alloc()/devm_iio_triger_free()
to automatically clean up triggers allocated by IIO drivers, thus
leading to simplified IIO drivers code.

Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
Signed-off-by: Kyunmin Park <kyungmin.park@samsung.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Jacek Anaszewski
2013-08-16 14:11:00 +01:00
committed by Jonathan Cameron
szülő 1696f36482
commit d536321df3
3 fájl változott, egészen pontosan 99 új sor hozzáadva és 4 régi sor törölve
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72
drivers/iio/industrialio-trigger.c
Fájl megtekintése

@@ -424,9 +424,8 @@ static void iio_trig_subirqunmask(struct irq_data *d)
trig->subirqs[d->irq - trig->subirq_base].enabled = true;
}
struct iio_trigger *iio_trigger_alloc(const char *fmt, ...)
static struct iio_trigger *viio_trigger_alloc(const char *fmt, va_list vargs)
{
va_list vargs;
struct iio_trigger *trig;
trig = kzalloc(sizeof *trig, GFP_KERNEL);
if (trig) {
@@ -444,9 +443,8 @@ struct iio_trigger *iio_trigger_alloc(const char *fmt, ...)
kfree(trig);
return NULL;
}
va_start(vargs, fmt);
trig->name = kvasprintf(GFP_KERNEL, fmt, vargs);
va_end(vargs);
if (trig->name == NULL) {
irq_free_descs(trig->subirq_base,
CONFIG_IIO_CONSUMERS_PER_TRIGGER);
@@ -467,6 +465,19 @@ struct iio_trigger *iio_trigger_alloc(const char *fmt, ...)
}
get_device(&trig->dev);
}
return trig;
}
struct iio_trigger *iio_trigger_alloc(const char *fmt, ...)
{
struct iio_trigger *trig;
va_list vargs;
va_start(vargs, fmt);
trig = viio_trigger_alloc(fmt, vargs);
va_end(vargs);
return trig;
}
EXPORT_SYMBOL(iio_trigger_alloc);
@@ -478,6 +489,59 @@ void iio_trigger_free(struct iio_trigger *trig)
}
EXPORT_SYMBOL(iio_trigger_free);
static void devm_iio_trigger_release(struct device *dev, void *res)
{
iio_trigger_free(*(struct iio_trigger **)res);
}
static int devm_iio_trigger_match(struct device *dev, void *res, void *data)
{
struct iio_trigger **r = res;
if (!r || !*r) {
WARN_ON(!r || !*r);
return 0;
}
return *r == data;
}
struct iio_trigger *devm_iio_trigger_alloc(struct device *dev,
const char *fmt, ...)
{
struct iio_trigger **ptr, *trig;
va_list vargs;
ptr = devres_alloc(devm_iio_trigger_release, sizeof(*ptr),
GFP_KERNEL);
if (!ptr)
return NULL;
/* use raw alloc_dr for kmalloc caller tracing */
va_start(vargs, fmt);
trig = viio_trigger_alloc(fmt, vargs);
va_end(vargs);
if (trig) {
*ptr = trig;
devres_add(dev, ptr);
} else {
devres_free(ptr);
}
return trig;
}
EXPORT_SYMBOL_GPL(devm_iio_trigger_alloc);
void devm_iio_trigger_free(struct device *dev, struct iio_trigger *iio_trig)
{
int rc;
rc = devres_release(dev, devm_iio_trigger_release,
devm_iio_trigger_match, iio_trig);
WARN_ON(rc);
}
EXPORT_SYMBOL_GPL(devm_iio_trigger_free);
void iio_device_register_trigger_consumer(struct iio_dev *indio_dev)
{
indio_dev->groups[indio_dev->groupcounter++] =