iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

scsi: NCR5380: Handle BUS FREE during reselection

Browse Source 
The X3T9.2 specification (draft) says, under "6.1.4.2 RESELECTION time-out
procedure", that a target may assert RST or go to BUS FREE phase if the
initiator does not respond within 200 us. Something like this has been
observed with AztecMonster II target. When it happens, all we can do is wait
for the target to try again.

Tested-by: Michael Schmitz <schmitzmic@gmail.com>
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Finn Thain 2018-09-27 11:17:11 +10:00 committed by Martin K. Petersen
parent 08267216b3
commit ca694afad7
1 changed files with 3 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/scsi/NCR5380.c
View File

@ -2047,6 +2047,9 @@ static void NCR5380_reselect(struct Scsi_Host *instance)
if (NCR5380_poll_politely(hostdata,
STATUS_REG, SR_REQ, SR_REQ, 2 * HZ) < 0) {
if ((NCR5380_read(STATUS_REG) & (SR_BSY | SR_SEL)) == 0)
/* BUS FREE phase */
return;
shost_printk(KERN_ERR, instance, "reselect: REQ timeout\n");
do_abort(instance);
return;