iio: buffer: check if a buffer has been set up when poll is called

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If no iio buffer has been set up and poll is called return 0.
Without this check there will be a null pointer dereference when
calling poll on a iio driver without an iio buffer.

Cc: stable@vger.kernel.org
Signed-off-by: Stefan Windfeldt-Prytz <stefan.windfeldt@axis.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

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Stefan Windfeldt-Prytz 2018-02-15 15:02:53 +01:00 • committed by Jonathan Cameron

parent f027e0b3a7

commit 4cd140bda6

1 changed files with 1 additions and 1 deletions

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drivers/iio/industrialio-buffer.c

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