From: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Date: Thu, 10 Sep 2015 11:18:13 +0000 (+0530)
Subject: spi: spidev: fix possible NULL dereference
X-Git-Tag: omap-for-v4.3/fixes-rc5~96^2^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=dd85ebf681ef0ee1fc985c353dd45e8b53b5dc1e;p=pandora-kernel.git

spi: spidev: fix possible NULL dereference

During the last close we are freeing spidev if spidev->spi is NULL, but
just before checking if spidev->spi is NULL we are dereferencing it.
Lets add a check there to avoid the NULL dereference.

Fixes: 9169051617df ("spi: spidev: Don't mangle max_speed_hz in underlying spi device")
Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Reviewed-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Tested-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
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