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ata: libata: Remove ata_noop_qc_prep()

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The function ata_noop_qc_prep(), as its name implies, does nothing and
simply returns AC_ERR_OK. For drivers that do not need any special
preparations of queued commands, we can avoid having to define struct
ata_port qc_prep operation by simply testing if that operation is
defined or not in ata_qc_issue(). Make this change and remove
ata_noop_qc_prep().

Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: John Garry <john.g.garry@oracle.com>
Reviewed-by: Sergey Shtylyov <s.shtylyov@omp.ru>
This commit is contained in:
Damien Le Moal 2024-07-30 14:38:07 +09:00
parent 73eb824914
commit b40824500e
8 changed files with 7 additions and 20 deletions
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18
drivers/ata/libata-core.c
View File

@ -4696,12 +4696,6 @@ int ata_std_qc_defer(struct ata_queued_cmd *qc)
}
EXPORT_SYMBOL_GPL(ata_std_qc_defer);
enum ata_completion_errors ata_noop_qc_prep(struct ata_queued_cmd *qc)
{
return AC_ERR_OK;
}
EXPORT_SYMBOL_GPL(ata_noop_qc_prep);
/**
* ata_sg_init - Associate command with scatter-gather table.
* @qc: Command to be associated
@ -5088,10 +5082,13 @@ void ata_qc_issue(struct ata_queued_cmd *qc)
return;
}
trace_ata_qc_prep(qc);
qc->err_mask |= ap->ops->qc_prep(qc);
if (unlikely(qc->err_mask))
goto err;
if (ap->ops->qc_prep) {
trace_ata_qc_prep(qc);
qc->err_mask |= ap->ops->qc_prep(qc);
if (unlikely(qc->err_mask))
goto err;
}
trace_ata_qc_issue(qc);
qc->err_mask |= ap->ops->qc_issue(qc);
if (unlikely(qc->err_mask))
@ -6724,7 +6721,6 @@ static void ata_dummy_error_handler(struct ata_port *ap)
}
struct ata_port_operations ata_dummy_port_ops = {
.qc_prep = ata_noop_qc_prep,
.qc_issue = ata_dummy_qc_issue,
.error_handler = ata_dummy_error_handler,
.sched_eh = ata_std_sched_eh,

1
drivers/ata/libata-sff.c
View File

@ -26,7 +26,6 @@ static struct workqueue_struct *ata_sff_wq;
const struct ata_port_operations ata_sff_port_ops = {
.inherits = &ata_base_port_ops,
.qc_prep = ata_noop_qc_prep,
.qc_issue = ata_sff_qc_issue,
.qc_fill_rtf = ata_sff_qc_fill_rtf,

2
drivers/ata/pata_ep93xx.c
View File

@ -884,8 +884,6 @@ static const struct scsi_host_template ep93xx_pata_sht = {
static struct ata_port_operations ep93xx_pata_port_ops = {
.inherits = &ata_bmdma_port_ops,
.qc_prep = ata_noop_qc_prep,
.softreset = ep93xx_pata_softreset,
.hardreset = ATA_OP_NULL,

2
drivers/ata/pata_icside.c
View File

@ -328,8 +328,6 @@ static void pata_icside_postreset(struct ata_link *link, unsigned int *classes)
static struct ata_port_operations pata_icside_port_ops = {
.inherits = &ata_bmdma_port_ops,
/* no need to build any PRD tables for DMA */
.qc_prep = ata_noop_qc_prep,
.sff_data_xfer = ata_sff_data_xfer32,
.bmdma_setup = pata_icside_bmdma_setup,
.bmdma_start = pata_icside_bmdma_start,

1
drivers/ata/pata_mpc52xx.c
View File

@ -620,7 +620,6 @@ static struct ata_port_operations mpc52xx_ata_port_ops = {
.bmdma_start = mpc52xx_bmdma_start,
.bmdma_stop = mpc52xx_bmdma_stop,
.bmdma_status = mpc52xx_bmdma_status,
.qc_prep = ata_noop_qc_prep,
};
static int mpc52xx_ata_init_one(struct device *dev,

1
drivers/ata/pata_octeon_cf.c
View File

@ -789,7 +789,6 @@ static unsigned int octeon_cf_qc_issue(struct ata_queued_cmd *qc)
static struct ata_port_operations octeon_cf_ops = {
.inherits = &ata_sff_port_ops,
.check_atapi_dma = octeon_cf_check_atapi_dma,
.qc_prep = ata_noop_qc_prep,
.qc_issue = octeon_cf_qc_issue,
.sff_dev_select = octeon_cf_dev_select,
.sff_irq_on = octeon_cf_ata_port_noaction,

1
drivers/scsi/libsas/sas_ata.c
View File

@ -564,7 +564,6 @@ static struct ata_port_operations sas_sata_ops = {
.error_handler = ata_std_error_handler,
.post_internal_cmd = sas_ata_post_internal,
.qc_defer = ata_std_qc_defer,
.qc_prep = ata_noop_qc_prep,
.qc_issue = sas_ata_qc_issue,
.qc_fill_rtf = sas_ata_qc_fill_rtf,
.set_dmamode = sas_ata_set_dmamode,

1
include/linux/libata.h
View File

@ -1168,7 +1168,6 @@ extern int ata_xfer_mode2shift(u8 xfer_mode);
extern const char *ata_mode_string(unsigned int xfer_mask);
extern unsigned int ata_id_xfermask(const u16 *id);
extern int ata_std_qc_defer(struct ata_queued_cmd *qc);
extern enum ata_completion_errors ata_noop_qc_prep(struct ata_queued_cmd *qc);
extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
unsigned int n_elem);
extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);