libata: implement ATA_QCFLAG_RETRY

Currently whether a command should be retried after failure is
determined inside ata_eh_finish().  Add ATA_QCFLAG_RETRY and move the
logic into ata_eh_autopsy().  This makes things clearer and helps
extending retry determination logic.

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

1 files changed, 1 insertions, 0 deletions

diff --git a/include/linux/libata.h b/include/linux/libata.h
index 61a7f8d06971..b25ea6ab1be9 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -224,6 +224,7 @@ enum {
         ATA_QCFLAG_RESULT_TF    = (1 << 4), /* result TF requested */
         ATA_QCFLAG_CLEAR_EXCL   = (1 << 5), /* clear excl_link on completion */
         ATA_QCFLAG_QUIET        = (1 << 6), /* don't report device error */
+        ATA_QCFLAG_RETRY        = (1 << 7), /* retry after failure */
 
         ATA_QCFLAG_FAILED       = (1 << 16), /* cmd failed and is owned by EH */
         ATA_QCFLAG_SENSE_VALID  = (1 << 17), /* sense data valid */