diff options
| author | Alison Schofield <amsfield22@gmail.com> | 2017-01-19 19:47:38 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-11-15 15:53:14 +0100 |
| commit | 19d0541bd2c22a1413017465069f4aa4cae00b43 (patch) | |
| tree | fbf5f5855566e54e10b68a48c98fd41bd0a87422 /drivers/staging/iio | |
| parent | 6bcd1787b587fcfd857ca0938cdc09d4776d9520 (diff) | |
iio: trigger: free trigger resource correctly
[ Upstream commit 10e840dfb0b7fc345082dd9e5fff3c1c02e7690e ]
These stand-alone trigger drivers were using iio_trigger_put()
where they should have been using iio_trigger_free(). The
iio_trigger_put() adds a module_put which is bad since they
never did a module_get.
In the sysfs driver, module_get/put's are used as triggers are
added & removed. This extra module_put() occurs on an error path
in the probe routine (probably rare).
In the bfin-timer & interrupt trigger drivers, the module resources
are not explicitly managed, so it's doing a put on something that
was never get'd. It occurs on the probe error path and on the
remove path (not so rare).
Tested with the sysfs trigger driver.
The bfin & interrupt drivers were build tested & inspected only.
Signed-off-by: Alison Schofield <amsfield22@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/iio')
| -rw-r--r-- | drivers/staging/iio/trigger/iio-trig-bfin-timer.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/staging/iio/trigger/iio-trig-bfin-timer.c b/drivers/staging/iio/trigger/iio-trig-bfin-timer.c index 38dca69a06eb..ce500a509aa2 100644 --- a/drivers/staging/iio/trigger/iio-trig-bfin-timer.c +++ b/drivers/staging/iio/trigger/iio-trig-bfin-timer.c @@ -260,7 +260,7 @@ out_free_irq: out1: iio_trigger_unregister(st->trig); out: - iio_trigger_put(st->trig); + iio_trigger_free(st->trig); return ret; } @@ -273,7 +273,7 @@ static int iio_bfin_tmr_trigger_remove(struct platform_device *pdev) peripheral_free(st->t->pin); free_irq(st->irq, st); iio_trigger_unregister(st->trig); - iio_trigger_put(st->trig); + iio_trigger_free(st->trig); return 0; } |