libata: fix reporting of drained bytes when clearing DRQ

When we drain data from a device to clear DRQ during error recovery,
the number of bytes reported as drained is too low by a factor of 2
because the count is actually reporting the number of words drained,
not bytes. Fix this.

Signed-off-by: Robert Hancock <hancockrwd@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c
index efa8773bef5a1add816a5a96a27553a005983248..741065c9da6700245a2ddb70f19908e3589f85c1 100644 (file)
--- a/drivers/ata/libata-sff.c
+++ b/drivers/ata/libata-sff.c
@@ -2275,7 +2275,7 @@ void ata_sff_drain_fifo(struct ata_queued_cmd *qc)
        ap = qc->ap;
        /* Drain up to 64K of data before we give up this recovery method */
        for (count = 0; (ap->ops->sff_check_status(ap) & ATA_DRQ)
-                                               && count < 32768; count++)
+                                               && count < 65536; count += 2)
                ioread16(ap->ioaddr.data_addr);
 
        /* Can become DEBUG later */