The only reason for ata_do_eh() to exist is that the two caller sites,
ata_std_error_handler() and ata_sff_error_handler() may pass to it a
NULL hardreset operation so that the built-in (generic) hardreset
operation for a driver is ignored if the adapter SCR access is not
available.
However, ata_std_error_handler() and ata_sff_error_handler()
modifications of the hardreset port operation can easily be combined as
they are mutually exclusive. That is, a driver using
sata_std_hardreset() as its hardreset operation cannot use
sata_sff_hardreset() and vice-versa.
With this observation, ata_do_eh() can be removed and its code moved to
ata_std_error_handler(). The condition used to ignore the builtin
hardreset port operations is modified to be the one that was used in
ata_sff_error_handler(). This requires defining a stub for the function
sata_sff_hardreset() to avoid compilation errors when CONFIG_ATA_SFF is
not enabled.
This change simplifies ata_sff_error_handler() as this function now only
needs to call ata_std_error_handler().
No functional changes.
Signed-off-by: Damien Le Moal <dlemoal@xxxxxxxxxx>
---
drivers/ata/libata-eh.c | 46 ++++++++++++----------------------------
drivers/ata/libata-sff.c | 10 +--------
include/linux/libata.h | 11 +++++++---
3 files changed, 22 insertions(+), 45 deletions(-)
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 436536112043..68581adc6f87 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -4067,59 +4067,39 @@ void ata_eh_finish(struct ata_port *ap)
}
/**
- * ata_do_eh - do standard error handling
+ * ata_std_error_handler - standard error handler
* @ap: host port to handle error for
*
- * @prereset: prereset method (can be NULL)
- * @softreset: softreset method (can be NULL)
- * @hardreset: hardreset method (can be NULL)
- * @postreset: postreset method (can be NULL)
- *
* Perform standard error handling sequence.
*
* LOCKING:
* Kernel thread context (may sleep).
*/
-void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
- ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
- ata_postreset_fn_t postreset)
+void ata_std_error_handler(struct ata_port *ap)
{
- struct ata_device *dev;
+ struct ata_port_operations *ops = ap->ops;
+ ata_reset_fn_t hardreset = ops->hardreset;
int rc;
+ /* Ignore built-in hardresets if SCR access is not available */
+ if ((hardreset == sata_std_hardreset ||
+ hardreset == sata_sff_hardreset) && !sata_scr_valid(&ap->link))
+ hardreset = NULL;
+
ata_eh_autopsy(ap);
ata_eh_report(ap);
- rc = ata_eh_recover(ap, prereset, softreset, hardreset, postreset,
- NULL);
+ rc = ata_eh_recover(ap, ops->prereset, ops->softreset,
+ hardreset, ops->postreset, NULL);
if (rc) {
+ struct ata_device *dev;
+
ata_for_each_dev(dev, &ap->link, ALL)
ata_dev_disable(dev);
}
ata_eh_finish(ap);
}
-
-/**
- * ata_std_error_handler - standard error handler
- * @ap: host port to handle error for
- *
- * Standard error handler
- *
- * LOCKING:
- * Kernel thread context (may sleep).
- */
-void ata_std_error_handler(struct ata_port *ap)
-{
- struct ata_port_operations *ops = ap->ops;
- ata_reset_fn_t hardreset = ops->hardreset;
-
- /* ignore built-in hardreset if SCR access is not available */
- if (hardreset == sata_std_hardreset && !sata_scr_valid(&ap->link))
- hardreset = NULL;
-
- ata_do_eh(ap, ops->prereset, ops->softreset, hardreset, ops->postreset);
-}
EXPORT_SYMBOL_GPL(ata_std_error_handler);
#ifdef CONFIG_PM
diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c
index 5a46c066abc3..e61f00779e40 100644
--- a/drivers/ata/libata-sff.c
+++ b/drivers/ata/libata-sff.c
@@ -2054,8 +2054,6 @@ EXPORT_SYMBOL_GPL(ata_sff_drain_fifo);
*/
void ata_sff_error_handler(struct ata_port *ap)
{
- ata_reset_fn_t softreset = ap->ops->softreset;
- ata_reset_fn_t hardreset = ap->ops->hardreset;
struct ata_queued_cmd *qc;
unsigned long flags;
@@ -2077,13 +2075,7 @@ void ata_sff_error_handler(struct ata_port *ap)
spin_unlock_irqrestore(ap->lock, flags);
- /* ignore built-in hardresets if SCR access is not available */
- if ((hardreset == sata_std_hardreset ||
- hardreset == sata_sff_hardreset) && !sata_scr_valid(&ap->link))
- hardreset = NULL;
-
- ata_do_eh(ap, ap->ops->prereset, softreset, hardreset,
- ap->ops->postreset);
+ ata_std_error_handler(ap);
}
EXPORT_SYMBOL_GPL(ata_sff_error_handler);
diff --git a/include/linux/libata.h b/include/linux/libata.h
index d092747be588..0bfdec20496f 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -1412,9 +1412,6 @@ extern void ata_eh_thaw_port(struct ata_port *ap);
extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
-extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
- ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
- ata_postreset_fn_t postreset);
extern void ata_std_error_handler(struct ata_port *ap);
extern void ata_std_sched_eh(struct ata_port *ap);
extern void ata_std_end_eh(struct ata_port *ap);
@@ -2152,6 +2149,14 @@ static inline u8 ata_wait_idle(struct ata_port *ap)
return status;
}
+#else /* CONFIG_ATA_SFF */
+
+static inline int sata_sff_hardreset(struct ata_link *link, unsigned int *class,
+ unsigned long deadline)
+{
+ return -EOPNOTSUPP;
+}
+
#endif /* CONFIG_ATA_SFF */
#endif /* __LINUX_LIBATA_H__ */
--
2.50.0