s390/qdio: lock device while installing IRQ handler

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During setup, qdio takes control of the presented ccw device and replaces
the device's IRQ handler with its own. To avoid any interference with
conccurent activity on the device, this should be done while holding the
device's lock.

Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com>
Reviewed-by: Benjamin Block <bblock@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

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Julian Wiedmann 2018-03-21 17:17:14 +01:00 • committed by Martin Schwidefsky

parent 89286320a2

commit 7eee12b44e

1 changed files with 2 additions and 0 deletions

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drivers/s390/cio/qdio_setup.c

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