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scsi: NCR5380: Handle PDMA failure reliably 

A PDMA error is handled in the core driver by setting the device's 'borken'
flag and aborting the command. Unfortunately, do_abort() is not
dependable. Perform a SCSI bus reset instead, to make sure that the command
fails and gets retried.

Cc: Michael Schmitz <schmitzmic@gmail.com>
Cc: stable@vger.kernel.org # v4.20+
Fixes: 1da177e4c3 ("Linux-2.6.12-rc2")
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Tested-by: Stan Johnson <userm57@yahoo.com>
Tested-by: Michael Schmitz <schmitzmic@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Finn Thain 2019-06-09 11:19:11 +10:00 committed by Martin K. Petersen
parent 57f3132651
commit f9dfed1c78
1 changed files with 2 additions and 4 deletions
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6
drivers/scsi/NCR5380.c
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@ -1761,10 +1761,8 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance)
scmd_printk(KERN_INFO, cmd,
"switching to slow handshake\n");
cmd->device->borken = 1;
sink = 1;
do_abort(instance);
cmd->result = DID_ERROR << 16;
/* XXX - need to source or sink data here, as appropriate */
do_reset(instance);
bus_reset_cleanup(instance);
}
} else {
/* Transfer a small chunk so that the