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@xxxxxxxxx>
---
This is an alternative version of the original patch
which safely copied the outgoing tf.flags to result_tf.flags.
Both work. Pick one.
--- upstream/drivers/ata/libata-eh.c 2008-04-18 09:31:15.000000000 -0400
+++ linux/drivers/ata/libata-eh.c 2008-04-23 16:25:38.000000000 -0400
@@ -1402,6 +1402,7 @@
/* 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;
}
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