s390/dasd: check for device error pointer within state change interrupts
authorStefan Haberland <sth@linux.vnet.ibm.com>
Wed, 25 Jan 2017 13:47:32 +0000 (14:47 +0100)
committerMartin Schwidefsky <schwidefsky@de.ibm.com>
Tue, 31 Jan 2017 09:47:15 +0000 (10:47 +0100)
commit2202134e48a3b50320aeb9e3dd1186833e9d7e66
treed6e73bfe17509597353206f761d22f0b4b78ae17
parentdefc2a9b9899511445cfbaa2c3a6509964b71207
s390/dasd: check for device error pointer within state change interrupts

Check if the device pointer is valid. Just a sanity check since we already
are in the int handler of the device.

Signed-off-by: Stefan Haberland <sth@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
drivers/s390/block/dasd.c