sata_nv: make hardreset return -EAGAIN on success
sata_nv hardreset can't classify but was left out while unifying
follow-up SRST request mechanism[1]. This caused detection failures
on those controllers. Fix it.
Reported and bisected by Roland Dreier, Petr Vandrovec and Marc
Dionne. Thanks guys.
[1] 305d2a1ab137d11d573319c315748a87060fe82d
Signed-off-by: Tejun Heo <htejun@gmail.com>
Cc: Roland Dreier <rdreier@cisco.com>
Cc: Petr Vandrovec <vandrove@vc.cvut.cz>
Cc: Marc Dionne <marc.c.dionne@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
diff --git a/drivers/ata/sata_nv.c b/drivers/ata/sata_nv.c
index 109b074..858f706 100644
--- a/drivers/ata/sata_nv.c
+++ b/drivers/ata/sata_nv.c
@@ -1591,13 +1591,16 @@
static int nv_hardreset(struct ata_link *link, unsigned int *class,
unsigned long deadline)
{
- unsigned int dummy;
+ int rc;
/* SATA hardreset fails to retrieve proper device signature on
- * some controllers. Don't classify on hardreset. For more
- * info, see http://bugzilla.kernel.org/show_bug.cgi?id=3352
+ * some controllers. Request follow up SRST. For more info,
+ * see http://bugzilla.kernel.org/show_bug.cgi?id=3352
*/
- return sata_sff_hardreset(link, &dummy, deadline);
+ rc = sata_sff_hardreset(link, class, deadline);
+ if (rc)
+ return rc;
+ return -EAGAIN;
}
static void nv_adma_error_handler(struct ata_port *ap)
