From: Tejun Heo <htejun@gmail.com>
Date: Wed, 23 Apr 2008 03:14:05 +0000 (+0900)
Subject: sata_nv: make hardreset return -EAGAIN on success
X-Git-Tag: v2.6.26-rc1~1060^2~14
X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=a0b9f4bc1ec2ea25e47e7958e544fef0d122e012;p=linux-2.6-omap-h63xx.git

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 109b0749572..858f70610ed 100644
--- a/drivers/ata/sata_nv.c
+++ b/drivers/ata/sata_nv.c
@@ -1591,13 +1591,16 @@ static void nv_mcp55_thaw(struct ata_port *ap)
 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)