linux-kernel - [PATCH] libata: -ENODEV during prereset isn't an error

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Message-ID: <4654105C.5030908@gmail.com>
Date:	Wed, 23 May 2007 11:58:52 +0200
From:	Tejun Heo <htejun@...il.com>
To:	Paul Mundt <lethal@...ux-sh.org>, Tejun Heo <htejun@...il.com>,
	Jeff Garzik <jgarzik@...ox.com>, linux-ide@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] libata: -ENODEV during prereset isn't an error

During prereset, -ENODEV return from ata_wait_ready() is not an error.
This causes unnecessary bug message on controllers which uses 0xff to
indicate empty port.  Fix it.

Signed-off-by: Tejun Heo <htejun@...il.com>
Cc: Paul Mundt <lethal@...ux-sh.org>
---

This one is for 2.6.22 too.  Thanks.

 libata-core.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index a6de57e..79f2175 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -3368,7 +3368,7 @@ int ata_std_prereset(struct ata_port *ap
 	 */
 	if (!(ap->flags & ATA_FLAG_SKIP_D2H_BSY) && !ata_port_offline(ap)) {
 		rc = ata_wait_ready(ap, deadline);
-		if (rc) {
+		if (rc && rc != -ENODEV) {
 			ata_port_printk(ap, KERN_WARNING, "device not ready "
 					"(errno=%d), forcing hardreset\n", rc);
 			ehc->i.action |= ATA_EH_HARDRESET;
-
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