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[S390] dasd: check sense type in device change handler 

When evaluating sense data in dasd_eckd_check_for_device_change, we
must always check for the type of sense data in byte 27, bit 0, to
make sure that the rest of the sense data is interpreted correctly.

Signed-off-by: Stefan Weinhuber <wein@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Stefan Weinhuber 2011-04-20 10:15:35 +02:00 committed by Martin Schwidefsky
parent e35c76cd47
commit c7a29e56f0
1 changed files with 3 additions and 2 deletions
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5
drivers/s390/block/dasd_eckd.c
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@ -2037,7 +2037,7 @@ static void dasd_eckd_check_for_device_change(struct dasd_device *device,
return;
/* summary unit check */
if ((sense[7] == 0x0D) &&
if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) &&
(scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) {
dasd_alias_handle_summary_unit_check(device, irb);
return;
@ -2053,7 +2053,8 @@ static void dasd_eckd_check_for_device_change(struct dasd_device *device,
/* loss of device reservation is handled via base devices only
* as alias devices may be used with several bases
*/
if (device->block && (sense[7] == 0x3F) &&
if (device->block && (sense[27] & DASD_SENSE_BIT_0) &&
(sense[7] == 0x3F) &&
(scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) &&
test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) {
if (device->features & DASD_FEATURE_FAILONSLCK)