[PATCH] libata: fix ->phy_reset class code handling in ata_bus_probe()

ata_bus_probe() doesn't clear dev->class after ->phy_reset().  This
can result in falsely enabled devices if probing fails.  Clear
dev->class to ATA_DEV_UNKNOWN after fetching it.

Signed-off-by: Tejun Heo <htejun@gmail.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c
index 85a004290072..1669dae53ce3 100644
--- a/drivers/scsi/libata-core.c
+++ b/drivers/scsi/libata-core.c
@@ -1397,9 +1397,11 @@ static int ata_bus_probe(struct ata_port *ap)
         } else {
                 ap->ops->phy_reset(ap);
 
-                if (!(ap->flags & ATA_FLAG_DISABLED))
-                        for (i = 0; i < ATA_MAX_DEVICES; i++)
+                for (i = 0; i < ATA_MAX_DEVICES; i++) {
+                        if (!(ap->flags & ATA_FLAG_DISABLED))
                                 classes[i] = ap->device[i].class;
+                        ap->device[i].class = ATA_DEV_UNKNOWN;
+                }
 
                 ata_port_probe(ap);
         }