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ata: libata: remove deprecated EH callbacks

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Now that 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@wdc.com>
Reviewed-by: John Garry <john.g.garry@oracle.com>
Reviewed-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Reviewed-by: Jason Yan <yanaijie@huawei.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
This commit is contained in:
Niklas Cassel 2023-07-31 16:34:21 +02:00 committed by Damien Le Moal
parent 89329c7384
commit 6b4f165e08
3 changed files with 7 additions and 24 deletions
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22
Documentation/driver-api/libata.rst
View File

@ -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

3
drivers/ata/pata_sl82c105.c
View File

@ -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.

6
include/linux/libata.h
View File

@ -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.