Commit 23ebda2f authored by Sebastian Andrzej Siewior's avatar Sebastian Andrzej Siewior Committed by Tejun Heo

libata: remove ata_sff_data_xfer_noirq()

ata_sff_data_xfer_noirq() is invoked via the ->sff_data_xfer hook. The
latter is invoked by ata_pio_sector(), atapi_send_cdb() and
__atapi_pio_bytes() which in turn is invoked by ata_sff_hsm_move().
The latter function requires that the "ap->lock" lock is held which
needs to be taken with disabled interrupts.

There is no need have to have ata_sff_data_xfer_noirq() which invokes
ata_sff_data_xfer32() with disabled interrupts because at this point the
interrupts are already disabled.
Remove the function and its references to it and replace all callers
with ata_sff_data_xfer32().
Signed-off-by: default avatarSebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: default avatarTejun Heo <tj@kernel.org>
parent aece27a2
......@@ -118,8 +118,7 @@ PIO data read/write
All bmdma-style drivers must implement this hook. This is the low-level
operation that actually copies the data bytes during a PIO data
transfer. Typically the driver will choose one of
:c:func:`ata_sff_data_xfer_noirq`, :c:func:`ata_sff_data_xfer`, or
:c:func:`ata_sff_data_xfer32`.
:c:func:`ata_sff_data_xfer`, or :c:func:`ata_sff_data_xfer32`.
ATA command execute
~~~~~~~~~~~~~~~~~~~
......
......@@ -657,36 +657,6 @@ unsigned int ata_sff_data_xfer32(struct ata_queued_cmd *qc, unsigned char *buf,
}
EXPORT_SYMBOL_GPL(ata_sff_data_xfer32);
/**
* ata_sff_data_xfer_noirq - Transfer data by PIO
* @qc: queued command
* @buf: data buffer
* @buflen: buffer length
* @rw: read/write
*
* Transfer data from/to the device data register by PIO. Do the
* transfer with interrupts disabled.
*
* LOCKING:
* Inherited from caller.
*
* RETURNS:
* Bytes consumed.
*/
unsigned int ata_sff_data_xfer_noirq(struct ata_queued_cmd *qc, unsigned char *buf,
unsigned int buflen, int rw)
{
unsigned long flags;
unsigned int consumed;
local_irq_save(flags);
consumed = ata_sff_data_xfer32(qc, buf, buflen, rw);
local_irq_restore(flags);
return consumed;
}
EXPORT_SYMBOL_GPL(ata_sff_data_xfer_noirq);
/**
* ata_pio_sector - Transfer a sector of data.
* @qc: Command on going
......
......@@ -178,7 +178,7 @@ static struct scsi_host_template cmd640_sht = {
static struct ata_port_operations cmd640_port_ops = {
.inherits = &ata_sff_port_ops,
/* In theory xfer_noirq is not needed once we kill the prefetcher */
.sff_data_xfer = ata_sff_data_xfer_noirq,
.sff_data_xfer = ata_sff_data_xfer32,
.sff_irq_check = cmd640_sff_irq_check,
.qc_issue = cmd640_qc_issue,
.cable_detect = ata_cable_40wire,
......
......@@ -324,7 +324,7 @@ 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_xfer_noirq,
.sff_data_xfer = ata_sff_data_xfer32,
.bmdma_setup = pata_icside_bmdma_setup,
.bmdma_start = pata_icside_bmdma_start,
.bmdma_stop = pata_icside_bmdma_stop,
......
......@@ -102,7 +102,7 @@ static struct scsi_host_template pata_imx_sht = {
static struct ata_port_operations pata_imx_port_ops = {
.inherits = &ata_sff_port_ops,
.sff_data_xfer = ata_sff_data_xfer_noirq,
.sff_data_xfer = ata_sff_data_xfer32,
.cable_detect = ata_cable_unknown,
.set_piomode = pata_imx_set_piomode,
};
......
......@@ -246,12 +246,12 @@ static const struct ata_port_operations legacy_base_port_ops = {
static struct ata_port_operations simple_port_ops = {
.inherits = &legacy_base_port_ops,
.sff_data_xfer = ata_sff_data_xfer_noirq,
.sff_data_xfer = ata_sff_data_xfer32,
};
static struct ata_port_operations legacy_port_ops = {
.inherits = &legacy_base_port_ops,
.sff_data_xfer = ata_sff_data_xfer_noirq,
.sff_data_xfer = ata_sff_data_xfer32,
.set_mode = legacy_set_mode,
};
......@@ -341,7 +341,7 @@ static unsigned int pdc_data_xfer_vlb(struct ata_queued_cmd *qc,
}
local_irq_restore(flags);
} else
buflen = ata_sff_data_xfer_noirq(qc, buf, buflen, rw);
buflen = ata_sff_data_xfer32(qc, buf, buflen, rw);
return buflen;
}
......
......@@ -44,7 +44,7 @@ static struct scsi_host_template palmld_sht = {
static struct ata_port_operations palmld_port_ops = {
.inherits = &ata_sff_port_ops,
.sff_data_xfer = ata_sff_data_xfer_noirq,
.sff_data_xfer = ata_sff_data_xfer32,
.cable_detect = ata_cable_40wire,
};
......
......@@ -151,7 +151,7 @@ static struct scsi_host_template pcmcia_sht = {
static struct ata_port_operations pcmcia_port_ops = {
.inherits = &ata_sff_port_ops,
.sff_data_xfer = ata_sff_data_xfer_noirq,
.sff_data_xfer = ata_sff_data_xfer32,
.cable_detect = ata_cable_40wire,
.set_mode = pcmcia_set_mode,
};
......
......@@ -49,7 +49,7 @@ static struct scsi_host_template pata_platform_sht = {
static struct ata_port_operations pata_platform_port_ops = {
.inherits = &ata_sff_port_ops,
.sff_data_xfer = ata_sff_data_xfer_noirq,
.sff_data_xfer = ata_sff_data_xfer32,
.cable_detect = ata_cable_unknown,
.set_mode = pata_platform_set_mode,
};
......
......@@ -471,7 +471,7 @@ static struct ata_port_operations via_port_ops = {
static struct ata_port_operations via_port_ops_noirq = {
.inherits = &via_port_ops,
.sff_data_xfer = ata_sff_data_xfer_noirq,
.sff_data_xfer = ata_sff_data_xfer32,
};
/**
......
......@@ -1832,8 +1832,6 @@ extern unsigned int ata_sff_data_xfer(struct ata_queued_cmd *qc,
unsigned char *buf, unsigned int buflen, int rw);
extern unsigned int ata_sff_data_xfer32(struct ata_queued_cmd *qc,
unsigned char *buf, unsigned int buflen, int rw);
extern unsigned int ata_sff_data_xfer_noirq(struct ata_queued_cmd *qc,
unsigned char *buf, unsigned int buflen, int rw);
extern void ata_sff_irq_on(struct ata_port *ap);
extern void ata_sff_irq_clear(struct ata_port *ap);
extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
......
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