[S390] dasd: fix unsolicited interrupt recognition

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The dasd interrupt handler needs to distinguish solicited from
unsolicited interrupts, as unsolicited interrupts may require special
handling (e.g. summary unit checks) and solicited interrupts require
proper error recovery for the failed I/O request.
The interrupt handler needs to check several bit fields in the
interrupt response block (irb) to make this distinction.
So far our check of the status control bits has not been specific
enough, which may lead to a failed request getting just retried
instead of the necessary error recovery.

Signed-off-by: Stefan Weinhuber <wein@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

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Stefan Weinhuber 2010-10-25 16:10:47 +02:00 • committed by Martin Schwidefsky

parent 26cffecf84

commit a5a0061fb3

2 changed files with 40 additions and 41 deletions

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11

drivers/s390/block/dasd.c

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70

drivers/s390/block/dasd_eckd.c

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