From ca694afad707cb3ae2fdef3b28454444d9ac726e Mon Sep 17 00:00:00 2001 From: Finn Thain Date: Thu, 27 Sep 2018 11:17:11 +1000 Subject: [PATCH] scsi: NCR5380: Handle BUS FREE during reselection 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 Signed-off-by: Finn Thain Signed-off-by: Martin K. Petersen --- drivers/scsi/NCR5380.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/scsi/NCR5380.c b/drivers/scsi/NCR5380.c index 419033643015..b9a3eb0647e4 100644 --- a/drivers/scsi/NCR5380.c +++ b/drivers/scsi/NCR5380.c @@ -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;