Commit ca694afa authored Sep 27, 2018 by Finn Thain Committed by Martin K. Petersen Sep 28, 2018

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 <schmitzmic@gmail.com>
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

parent 08267216

drivers/scsi/NCR5380.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -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;

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