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author	Alexander Shishkin <alexander.shishkin@linux.intel.com>
	Mon, 7 Mar 2016 15:04:45 +0000 (17:04 +0200)
committer	Alexander Shishkin <alexander.shishkin@linux.intel.com>
	Fri, 8 Apr 2016 13:11:58 +0000 (16:11 +0300)
commit	f18a9531f6da9aba2920a3a5f166dba5a20592a0
tree	4e88611c1a4817d6d7a6dc81ef57e79527d18e08	tree \| snapshot (tar.gz zip)
parent	e8644e4c2aa5c52c357f63af9cc17ef5dce38396	commit \| diff

intel_th: Fix activating a subdevice without a driver

If output subdevice driver is not loaded, activating it will try to
call its ->activate method and crash. Fix this by explicitly checking
for the driver.

Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Reviewed-by: Laurent Fert <laurent.fert@intel.com>

drivers/hwtracing/intel_th/core.c		diff \| blob \| blame \| history
drivers/hwtracing/intel_th/intel_th.h		diff \| blob \| blame \| history

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