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Subject[PATCH 3/7] scsi: NCR5380: Handle PDMA failure reliably
Date
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: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Tested-by: Stan Johnson <userm57@yahoo.com>
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
---
drivers/scsi/NCR5380.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/scsi/NCR5380.c b/drivers/scsi/NCR5380.c
index 08e3ea8159b3..d9fa9cf2fd8b 100644
--- a/drivers/scsi/NCR5380.c
+++ b/drivers/scsi/NCR5380.c
@@ -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
--
2.21.0
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