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pata_cmd64x: implement sff_irq_clear() method

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Convert the driver's two bmdma_stop() methods into sff_irq_clear() methods --
they shouldn't have been bothering with clearing interrupts from the very start;
the driver will now use the standard bmdma_stop() method implementation (where
appropriate).

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
Sergei Shtylyov 2012-03-11 22:27:01 +03:00 committed by Jeff Garzik
parent 8a686bc984
commit 419fd24613
1 changed files with 15 additions and 16 deletions
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31
drivers/ata/pata_cmd64x.c
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@ -33,7 +33,7 @@
#include <linux/libata.h>
#define DRV_NAME "pata_cmd64x"
#define DRV_VERSION "0.2.16"
#define DRV_VERSION "0.2.17"
/*
* CMD64x specific registers definition.
@ -230,41 +230,39 @@ static void cmd64x_set_dmamode(struct ata_port *ap, struct ata_device *adev)
}
/**
* cmd64x_bmdma_stop - DMA stop callback
* @qc: Command in progress
* cmd64x_sff_irq_clear - clear IDE interrupt
* @ap: ATA interface
*
* DMA has completed.
* Clear IDE interrupt in CFR/ARTTIM23 and DMA status registers.
*/
static void cmd64x_bmdma_stop(struct ata_queued_cmd *qc)
static void cmd64x_sff_irq_clear(struct ata_port *ap)
{
struct ata_port *ap = qc->ap;
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
int irq_reg = ap->port_no ? ARTTIM23 : CFR;
u8 irq_stat;
ata_bmdma_stop(qc);
ata_bmdma_irq_clear(ap);
/* Reading the register should be enough to clear the interrupt */
pci_read_config_byte(pdev, irq_reg, &irq_stat);
}
/**
* cmd648_bmdma_stop - DMA stop callback
* @qc: Command in progress
* cmd648_sff_irq_clear - clear IDE interrupt
* @ap: ATA interface
*
* DMA has completed.
* Clear IDE interrupt in MRDMODE and DMA status registers.
*/
static void cmd648_bmdma_stop(struct ata_queued_cmd *qc)
static void cmd648_sff_irq_clear(struct ata_port *ap)
{
struct ata_port *ap = qc->ap;
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
unsigned long base = pci_resource_start(pdev, 4);
int irq_mask = ap->port_no ? MRDMODE_INTR_CH1 : MRDMODE_INTR_CH0;
u8 mrdmode;
ata_bmdma_stop(qc);
ata_bmdma_irq_clear(ap);
/* Clear this port's interrupt bit (leaving the other port alone) */
mrdmode = inb(base + 1);
@ -296,25 +294,26 @@ static const struct ata_port_operations cmd64x_base_ops = {
static struct ata_port_operations cmd64x_port_ops = {
.inherits = &cmd64x_base_ops,
.bmdma_stop = cmd64x_bmdma_stop,
.sff_irq_clear = cmd64x_sff_irq_clear,
.cable_detect = ata_cable_40wire,
};
static struct ata_port_operations cmd646r1_port_ops = {
.inherits = &cmd64x_base_ops,
.sff_irq_clear = cmd64x_sff_irq_clear,
.bmdma_stop = cmd646r1_bmdma_stop,
.cable_detect = ata_cable_40wire,
};
static struct ata_port_operations cmd646r3_port_ops = {
.inherits = &cmd64x_base_ops,
.bmdma_stop = cmd648_bmdma_stop,
.sff_irq_clear = cmd648_sff_irq_clear,
.cable_detect = ata_cable_40wire,
};
static struct ata_port_operations cmd648_port_ops = {
.inherits = &cmd64x_base_ops,
.bmdma_stop = cmd648_bmdma_stop,
.sff_irq_clear = cmd648_sff_irq_clear,
.cable_detect = cmd648_cable_detect,
};