2 files changed, 9 insertions, 2 deletions

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index d006e5c4768c..564c03c4ebb3 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -5404,8 +5404,8 @@ void ata_dev_init(struct ata_device *dev)
         dev->horkage = 0;
         spin_unlock_irqrestore(ap->lock, flags);
 
-        memset((void *)dev + ATA_DEVICE_CLEAR_OFFSET, 0,
-               sizeof(*dev) - ATA_DEVICE_CLEAR_OFFSET);
+        memset((void *)dev + ATA_DEVICE_CLEAR_BEGIN, 0,
+               ATA_DEVICE_CLEAR_END - ATA_DEVICE_CLEAR_BEGIN);
         dev->pio_mask = UINT_MAX;
         dev->mwdma_mask = UINT_MAX;
         dev->udma_mask = UINT_MAX;
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index aafe82bf5e2e..90092c1aae53 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -1194,6 +1194,11 @@ void ata_dev_disable(struct ata_device *dev)
         ata_acpi_on_disable(dev);
         ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO0 | ATA_DNXFER_QUIET);
         dev->class++;
+
+        /* From now till the next successful probe, ering is used to
+         * track probe failures.  Clear accumulated device error info.
+         */
+        ata_ering_clear(&dev->ering);
 }
 
 /**
@@ -2765,6 +2770,8 @@ static int ata_eh_revalidate_and_attach(struct ata_link *link,
                                                      readid_flags, dev->id);
                         switch (rc) {
                         case 0:
+                                /* clear error info accumulated during probe */
+                                ata_ering_clear(&dev->ering);
                                 new_mask |= 1 << dev->devno;
                                 break;
                         case -ENOENT: