提交 4fb4615b 编写于 作者: T Tejun Heo 提交者: Jeff Garzik

libata: no need to speed down if already at PIO0

After reset, transfer mode is always PIO0 regardless of
dev->xfer_mask.  Check dev->pio_mode before trying to slow down after
configuration failure.  This prevents bogus speed down before device
is actually configured.
Signed-off-by: NTejun Heo <htejun@gmail.com>
Acked-by: NAlan Cox <alan@redhat.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>
上级 cdeab114
...@@ -2437,7 +2437,7 @@ static int ata_eh_handle_dev_fail(struct ata_device *dev, int err) ...@@ -2437,7 +2437,7 @@ static int ata_eh_handle_dev_fail(struct ata_device *dev, int err)
/* give it just one more chance */ /* give it just one more chance */
ehc->tries[dev->devno] = min(ehc->tries[dev->devno], 1); ehc->tries[dev->devno] = min(ehc->tries[dev->devno], 1);
case -EIO: case -EIO:
if (ehc->tries[dev->devno] == 1) { if (ehc->tries[dev->devno] == 1 && dev->pio_mode > XFER_PIO_0) {
/* This is the last chance, better to slow /* This is the last chance, better to slow
* down than lose it. * down than lose it.
*/ */
......
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