From: Tejun Heo <htejun@gmail.com>
Date: Sun, 12 Mar 2006 16:57:01 +0000 (+0900)
Subject: [PATCH] libata: fix class handling in ata_bus_probe()
X-Git-Tag: firefly_0821_release~37605^2~6
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=2044470cccec1bfe6bb819027975df302ff43bf8;p=firefly-linux-kernel-4.4.55.git

[PATCH] libata: fix class handling in ata_bus_probe()

ata_bus_probe() didn't set classes[] properly for port disabled case
of ->phy_reset() compatibility path.  This patch moves classes[]
initialization and normalization out of ->probe_reset block such that
it applies to both ->probe_reset and ->phy_reset paths.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---

diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c
index 42d43b55fb8f..c17df3f22fd1 100644
--- a/drivers/scsi/libata-core.c
+++ b/drivers/scsi/libata-core.c
@@ -1344,32 +1344,30 @@ static int ata_bus_probe(struct ata_port *ap)
 
 	ata_port_probe(ap);
 
-	/* reset */
-	if (ap->ops->probe_reset) {
-		for (i = 0; i < ATA_MAX_DEVICES; i++)
-			classes[i] = ATA_DEV_UNKNOWN;
+	/* reset and determine device classes */
+	for (i = 0; i < ATA_MAX_DEVICES; i++)
+		classes[i] = ATA_DEV_UNKNOWN;
 
+	if (ap->ops->probe_reset) {
 		rc = ap->ops->probe_reset(ap, classes);
 		if (rc) {
 			printk("ata%u: reset failed (errno=%d)\n", ap->id, rc);
 			return rc;
 		}
-
-		for (i = 0; i < ATA_MAX_DEVICES; i++)
-			if (classes[i] == ATA_DEV_UNKNOWN)
-				classes[i] = ATA_DEV_NONE;
 	} else {
 		ap->ops->phy_reset(ap);
 
-		for (i = 0; i < ATA_MAX_DEVICES; i++) {
-			if (!(ap->flags & ATA_FLAG_PORT_DISABLED))
+		if (!(ap->flags & ATA_FLAG_PORT_DISABLED))
+			for (i = 0; i < ATA_MAX_DEVICES; i++)
 				classes[i] = ap->device[i].class;
-			else
-				ap->device[i].class = ATA_DEV_UNKNOWN;
-		}
+
 		ata_port_probe(ap);
 	}
 
+	for (i = 0; i < ATA_MAX_DEVICES; i++)
+		if (classes[i] == ATA_DEV_UNKNOWN)
+			classes[i] = ATA_DEV_NONE;
+
 	/* read IDENTIFY page and configure devices */
 	for (i = 0; i < ATA_MAX_DEVICES; i++) {
 		struct ata_device *dev = &ap->device[i];