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authorTejun Heo <htejun@gmail.com>2007-10-26 16:12:41 +0900
committerJeff Garzik <jeff@garzik.org>2007-10-30 09:59:42 -0400
commitf90f0828e57e97cb1ff19520d252882cfc6fb3c0 (patch)
tree14e67383982020fa1eba40af22d202e5ec04a77b /drivers/ata/libata-eh.c
parentb666da35d900c26cbea1caa465649e2e0afa406c (diff)
libata: stop being overjealous about non-IO commands
libata EH always revalidated device and retried failed command after error except for ATAPI CCs. This is unnecessary and hinders with users issuing direct commands. This patch makes the following changes. * Make sata_sil24 not request ATA_EH_REVALIDATE on device errors. sil24 is the only driver which does this. All others let libata EH core code decide. * Don't request revalidation after device error of non-IO command. Revalidation doesn't really help anybody. As ATA_EH_REVALIDATE isn't set by default, there's no reason to clear it after sense data is read. Kill ATA_EH_REVALIDATE clearing code while at it. * Don't retry non-IO command after device error. Device has rejected the command. There's no point in retrying. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/ata/libata-eh.c')
-rw-r--r--drivers/ata/libata-eh.c16
1 files changed, 11 insertions, 5 deletions
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index fefea7470e5..3c6ad7d949c 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -1800,10 +1800,8 @@ static void ata_eh_link_autopsy(struct ata_link *link)
qc->err_mask &= ~AC_ERR_OTHER;
/* SENSE_VALID trumps dev/unknown error and revalidation */
- if (qc->flags & ATA_QCFLAG_SENSE_VALID) {
+ if (qc->flags & ATA_QCFLAG_SENSE_VALID)
qc->err_mask &= ~(AC_ERR_DEV | AC_ERR_OTHER);
- ehc->i.action &= ~ATA_EH_REVALIDATE;
- }
/* accumulate error info */
ehc->i.dev = qc->dev;
@@ -1816,7 +1814,8 @@ static void ata_eh_link_autopsy(struct ata_link *link)
if (ap->pflags & ATA_PFLAG_FROZEN ||
all_err_mask & (AC_ERR_HSM | AC_ERR_TIMEOUT))
ehc->i.action |= ATA_EH_SOFTRESET;
- else if (all_err_mask)
+ else if ((is_io && all_err_mask) ||
+ (!is_io && (all_err_mask & ~AC_ERR_DEV)))
ehc->i.action |= ATA_EH_REVALIDATE;
/* if we have offending qcs and the associated failed device */
@@ -2697,8 +2696,15 @@ void ata_eh_finish(struct ata_port *ap)
/* FIXME: Once EH migration is complete,
* generate sense data in this function,
* considering both err_mask and tf.
+ *
+ * There's no point in retrying invalid
+ * (detected by libata) and non-IO device
+ * errors (rejected by device). Finish them
+ * immediately.
*/
- if (qc->err_mask & AC_ERR_INVALID)
+ if ((qc->err_mask & AC_ERR_INVALID) ||
+ (!(qc->flags & ATA_QCFLAG_IO) &&
+ qc->err_mask == AC_ERR_DEV))
ata_eh_qc_complete(qc);
else
ata_eh_qc_retry(qc);