From: Niklas Cassel <niklas.cassel@xxxxxxx>
Now when all libata drivers have migrated to use the error_handler
callback, remove the deprecated phy_reset and eng_timeout callbacks.
Also remove references to non-existent functions sata_phy_reset and
ata_qc_timeout from Documentation/driver-api/libata.rst.
Signed-off-by: Niklas Cassel <niklas.cassel@xxxxxxx>
Reviewed-by: John Garry <john.g.garry@xxxxxxxxxx>
Reviewed-by: Sergey Shtylyov <s.shtylyov@xxxxxx>
Reviewed-by: Jason Yan <yanaijie@xxxxxxxxxx>
---
Documentation/driver-api/libata.rst | 22 ++++++----------------
drivers/ata/pata_sl82c105.c | 3 +--
include/linux/libata.h | 6 ------
3 files changed, 7 insertions(+), 24 deletions(-)
diff --git a/Documentation/driver-api/libata.rst b/Documentation/driver-api/libata.rst
index eecb8b81e185..5da27a749246 100644
--- a/Documentation/driver-api/libata.rst
+++ b/Documentation/driver-api/libata.rst
@@ -256,14 +256,6 @@ advanced drivers implement their own ``->qc_issue``.
Exception and probe handling (EH)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-::
-
- void (*eng_timeout) (struct ata_port *ap);
- void (*phy_reset) (struct ata_port *ap);
-
-
-Deprecated. Use ``->error_handler()`` instead.
-
::
void (*freeze) (struct ata_port *ap);
@@ -348,8 +340,7 @@ SATA phy read/write
u32 val);
-Read and write standard SATA phy registers. Currently only used if
-``->phy_reset`` hook called the :c:func:`sata_phy_reset` helper function.
+Read and write standard SATA phy registers.
sc_reg is one of SCR_STATUS, SCR_CONTROL, SCR_ERROR, or SCR_ACTIVE.
Init and shutdown
@@ -520,13 +511,12 @@ to return without deallocating the qc. This leads us to
:c:func:`ata_scsi_error` is the current ``transportt->eh_strategy_handler()``
for libata. As discussed above, this will be entered in two cases -
-timeout and ATAPI error completion. This function calls low level libata
-driver's :c:func:`eng_timeout` callback, the standard callback for which is
-:c:func:`ata_eng_timeout`. It checks if a qc is active and calls
-:c:func:`ata_qc_timeout` on the qc if so. Actual error handling occurs in
-:c:func:`ata_qc_timeout`.
+timeout and ATAPI error completion. This function will check if a qc is active
+and has not failed yet. Such a qc will be marked with AC_ERR_TIMEOUT such that
+EH will know to handle it later. Then it calls low level libata driver's
+:c:func:`error_handler` callback.
-If EH is invoked for timeout, :c:func:`ata_qc_timeout` stops BMDMA and
+When the :c:func:`error_handler` callback is invoked it stops BMDMA and
completes the qc. Note that as we're currently in EH, we cannot call
scsi_done. As described in SCSI EH doc, a recovered scmd should be
either retried with :c:func:`scsi_queue_insert` or finished with
diff --git a/drivers/ata/pata_sl82c105.c b/drivers/ata/pata_sl82c105.c
index 3b62ea482f1a..93882e976ede 100644
--- a/drivers/ata/pata_sl82c105.c
+++ b/drivers/ata/pata_sl82c105.c
@@ -180,8 +180,7 @@ static void sl82c105_bmdma_start(struct ata_queued_cmd *qc)
* document.
*
* This function is also called to turn off DMA when a timeout occurs
- * during DMA operation. In both cases we need to reset the engine,
- * so no actual eng_timeout handler is required.
+ * during DMA operation. In both cases we need to reset the engine.
*
* We assume bmdma_stop is always called if bmdma_start as called. If
* not then we may need to wrap qc_issue.
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 049159905a28..7a9cbc28472d 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -975,12 +975,6 @@ struct ata_port_operations {
ssize_t (*transmit_led_message)(struct ata_port *ap, u32 state,
ssize_t size);
- /*
- * Obsolete
- */
- void (*phy_reset)(struct ata_port *ap);
- void (*eng_timeout)(struct ata_port *ap);
-
/*
* ->inherits must be the last field and all the preceding
* fields must be pointers.
--
2.41.0
