s390/cio: use device_lock during cmb activation

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Hold the device_lock during [de]activation of the channel measurement
block to synchronize concurrent usage of these functions.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Reviewed-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

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Sebastian Ott 2015-09-15 13:11:42 +02:00 • committed by Martin Schwidefsky

parent 279b8f9a0f

commit 1bc6664bdf

3 changed files with 39 additions and 13 deletions

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1

arch/s390/include/asm/cmb.h

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51

drivers/s390/cio/cmf.c

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2

drivers/s390/cio/device.c

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