Implement EH helper function ata_eh_finish_qcs(). This function is
called after all EH actions are complete and finishes all the failed
qcs. Depending on error status, a qc may be retried or completed.
This function is also responsible for loading qc->tf with resulting TF
values.
Signed-off-by: Tejun Heo <htejun@xxxxxxxxx>
---
drivers/scsi/libata-core.c | 1 +
drivers/scsi/libata-eh.c | 45 ++++++++++++++++++++++++++++++++++++++++++++
include/linux/libata.h | 2 ++
3 files changed, 48 insertions(+), 0 deletions(-)
a47d957e6a718253b6ce1b6131da2dcbbbb52641
diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c
index cb174cf..7605313 100644
--- a/drivers/scsi/libata-core.c
+++ b/drivers/scsi/libata-core.c
@@ -5346,3 +5346,4 @@ EXPORT_SYMBOL_GPL(ata_eh_determine_qc);
EXPORT_SYMBOL_GPL(ata_eh_autopsy);
EXPORT_SYMBOL_GPL(ata_eh_report);
EXPORT_SYMBOL_GPL(ata_eh_revive);
+EXPORT_SYMBOL_GPL(ata_eh_finish_qcs);
diff --git a/drivers/scsi/libata-eh.c b/drivers/scsi/libata-eh.c
index 1d25d55..0d8a9cb 100644
--- a/drivers/scsi/libata-eh.c
+++ b/drivers/scsi/libata-eh.c
@@ -1124,3 +1124,48 @@ int ata_eh_revive(struct ata_port *ap, u
return rc;
}
+
+/**
+ * ata_eh_finish_qcs - complete or retry commands
+ * @ap: host port to finish qc's for
+ * @qc: the failed qc (can be NULL)
+ * @tf: taskfile register of the failed qc
+ *
+ * Retry or complete failed qc's.
+ *
+ * LOCKING:
+ * None.
+ */
+void ata_eh_finish_qcs(struct ata_port *ap, struct ata_queued_cmd *qc,
+ struct ata_taskfile *tf)
+{
+ struct ata_taskfile tmp_tf;
+
+ if (qc) {
+ /* prevent infinite retry loop */
+ if (!qc->err_mask && !(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
+ printk(KERN_WARNING "ata%u: dev %u qc has no error "
+ "flag set after EH, forcing AC_ERR_OTHER\n",
+ ap->id, qc->dev->devno);
+ qc->err_mask |= AC_ERR_OTHER;
+ }
+
+ /* FIXME: qc->tf will be used by completion callbacks
+ * to generate SCSI sense data. This is to share
+ * sense generation code with old-EH drivers. Once EH
+ * migration is complete, generate sense data in this
+ * function, considering both err_mask and tf.
+ */
+ tmp_tf = *tf;
+ tmp_tf.flags = qc->tf.flags;
+ tmp_tf.protocol = qc->tf.protocol;
+ tmp_tf.ctl = qc->tf.ctl;
+ qc->tf = tmp_tf;
+
+ if (qc->err_mask & AC_ERR_INVALID ||
+ qc->flags & ATA_QCFLAG_SENSE_VALID)
+ ata_eh_qc_complete(qc);
+ else
+ ata_eh_qc_retry(qc);
+ }
+}
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 22472f6..7f626d2 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -700,6 +700,8 @@ extern void ata_eh_report(struct ata_por
extern int ata_eh_revive(struct ata_port *ap, unsigned int action,
ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
ata_postreset_fn_t postreset);
+extern void ata_eh_finish_qcs(struct ata_port *ap, struct ata_queued_cmd *qc,
+ struct ata_taskfile *tf);
static inline int
--
1.2.4
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