linux-legacy-genesi

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Stefan Weinhuber 238659281d S390: dasd: support DIAG access for read-only devices

commit 22825ab7693fd29769518a0d25ba43c01a50092a upstream.

When a DASD device is used with the DIAG discipline, the DIAG
initialization will indicate success or error with a respective
return code. So far we have interpreted a return code of 4 as error,
but it actually means that the initialization was successful, but
the device is read-only. To allow read-only devices to be used with
DIAG we need to accept a return code of 4 as success.

Re-initialization of the DIAG access is also part of the DIAG error
recovery. If we find that the access mode of a device has been
changed from writable to read-only while the device was in use,
we print an error message.

Signed-off-by: Stefan Weinhuber <wein@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Stephen Powell <zlinuxman@wowway.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

2010-01-06 14:26:42 -08:00

dasd_3990_erp.c

[S390] dasd: message cleanup

2009-03-26 15:24:05 +01:00

dasd_alias.c

[S390] dasd: message cleanup

2009-03-26 15:24:05 +01:00

dasd_devmap.c

[S390] pm: dasd power management callbacks.

2009-06-16 10:31:10 +02:00

dasd_diag.c

S390: dasd: support DIAG access for read-only devices