libata-eh set tf flags in NCQ EH result_tf

Fix mis-reporting of NCQ errors by ensuring that result_tf->flags
is properly initialized in libata-eh.  This allows ata_gen_ata_sense()
to report the failed block number correctly to SCSI after a media error
during NCQ.

This patch may also be a candidate for backporting to earlier kernels.
Without this fix, SCSI will fail I/O on the entire request rather
than just the bad sector.  That can be bad for a request that was
merged from many independent read reads from different tasks.

Signed-off-by: Mark Lord <mlord@pobox.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index d94359a24d419cbe36ee09bb155d9a32ef8d81fa..61dcd0026c64c301c8ce43a0ec89e5eebaf755f8 100644 (file)
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -1402,6 +1402,7 @@ static void ata_eh_analyze_ncq_error(struct ata_link *link)
        /* we've got the perpetrator, condemn it */
        qc = __ata_qc_from_tag(ap, tag);
        memcpy(&qc->result_tf, &tf, sizeof(tf));
+       qc->result_tf.flags = ATA_TFLAG_ISADDR | ATA_TFLAG_LBA | ATA_TFLAG_LBA48;
        qc->err_mask |= AC_ERR_DEV | AC_ERR_NCQ;
        ehc->i.err_mask &= ~AC_ERR_DEV;
 }