s390/dasd: fix hanging device after clear subchannel

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commit 9ba333dc55 upstream.

When a device is in a status where CIO has killed all I/O by itself the
interrupt for a clear request may not contain an irb to determine the
clear function. Instead it contains an error pointer -EIO.
This was ignored by the DASD int_handler leading to a hanging device
waiting for a clear interrupt.

Handle -EIO error pointer correctly for requests that are clear pending and
treat the clear as successful.

Signed-off-by: Stefan Haberland <sth@linux.vnet.ibm.com>
Reviewed-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

...

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Stefan Haberland 2016-08-08 14:08:17 +02:00 • committed by Ben Hutchings

parent c4b341a9ef

commit d2a6f15625

1 changed files with 9 additions and 1 deletions

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drivers/s390/block/dasd.c

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