From: Crestez Dan Leonard <leonard.crestez@intel.com>
Date: Tue, 3 May 2016 12:27:09 +0000 (+0300)
Subject: iio: Fix error handling in iio_trigger_attach_poll_func
X-Git-Tag: v3.2.82~45
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7e1e5ca41ceb8b67714fd9fb3c8819f48e920112;p=pandora-kernel.git

iio: Fix error handling in iio_trigger_attach_poll_func

commit 99543823357966ac938d9a310947e731b67338e6 upstream.

When attaching a pollfunc iio_trigger_attach_poll_func will allocate a
virtual irq and call the driver's set_trigger_state function. Fix error
handling to undo previous steps if any fails.

In particular this fixes handling errors from a driver's
set_trigger_state function. When using triggered buffers a failure to
enable the trigger used to make the buffer unusable.

Signed-off-by: Crestez Dan Leonard <leonard.crestez@intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
[bwh: Backported to 3.2: adjust filename]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

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