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ide: ->ide_dma_clear_irq() -> ->clear_irq()

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* Rename ->ide_dma_clear_irq method to ->clear_irq
  and move it from ide_hwif_t to struct ide_port_ops.

* Move ->waiting_for_dma check inside ->clear_irq method.

* Move ->dma_base check inside ->clear_irq method.

piix.c:
* Add ich_port_ops and remove init_hwif_ich() wrapper.

There should be no functional changes caused by this patch.

Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2008-10-13 21:39:42 +02:00
parent a9ab09e260
commit bfa7d8e55f
3 changed files with 29 additions and 29 deletions
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15
drivers/ide/ide-io.c
View File

@ -1418,23 +1418,16 @@ irqreturn_t ide_intr (int irq, void *dev_id)
del_timer(&hwgroup->timer);
spin_unlock(&ide_lock);
/* Some controllers might set DMA INTR no matter DMA or PIO;
* bmdma status might need to be cleared even for
* PIO interrupts to prevent spurious/lost irq.
*/
if (hwif->ide_dma_clear_irq && !(drive->waiting_for_dma))
/* ide_dma_end() needs bmdma status for error checking.
* So, skip clearing bmdma status here and leave it
* to ide_dma_end() if this is dma interrupt.
*/
hwif->ide_dma_clear_irq(drive);
if (hwif->port_ops && hwif->port_ops->clear_irq)
hwif->port_ops->clear_irq(drive);
if (drive->dev_flags & IDE_DFLAG_UNMASK)
local_irq_enable_in_hardirq();
/* service this interrupt, may set handler for next interrupt */
startstop = handler(drive);
spin_lock_irq(&ide_lock);
spin_lock_irq(&ide_lock);
/*
* Note that handler() may have set things up for another
* interrupt to occur soon, but it cannot happen until

39
drivers/ide/pci/piix.c
View File

@ -215,17 +215,26 @@ static unsigned int init_chipset_ich(struct pci_dev *dev)
}
/**
* piix_dma_clear_irq - clear BMDMA status
* @drive: IDE drive to clear
* ich_clear_irq - clear BMDMA status
* @drive: IDE drive
*
* Called from ide_intr() for PIO interrupts
* to clear BMDMA status as needed by ICHx
* ICHx contollers set DMA INTR no matter DMA or PIO.
* BMDMA status might need to be cleared even for
* PIO interrupts to prevent spurious/lost IRQ.
*/
static void piix_dma_clear_irq(ide_drive_t *drive)
static void ich_clear_irq(ide_drive_t *drive)
{
ide_hwif_t *hwif = HWIF(drive);
u8 dma_stat;
/*
* ide_dma_end() needs BMDMA status for error checking.
* So, skip clearing BMDMA status here and leave it
* to ide_dma_end() if this is DMA interrupt.
*/
if (drive->waiting_for_dma || hwif->dma_base == 0)
return;
/* clear the INTR & ERROR bits */
dma_stat = inb(hwif->dma_base + ATA_DMA_STATUS);
/* Should we force the bit as well ? */
@ -293,21 +302,19 @@ static void __devinit init_hwif_piix(ide_hwif_t *hwif)
hwif->ultra_mask = hwif->mwdma_mask = hwif->swdma_mask = 0;
}
static void __devinit init_hwif_ich(ide_hwif_t *hwif)
{
init_hwif_piix(hwif);
/* ICHx need to clear the BMDMA status for all interrupts */
if (hwif->dma_base)
hwif->ide_dma_clear_irq = &piix_dma_clear_irq;
}
static const struct ide_port_ops piix_port_ops = {
.set_pio_mode = piix_set_pio_mode,
.set_dma_mode = piix_set_dma_mode,
.cable_detect = piix_cable_detect,
};
static const struct ide_port_ops ich_port_ops = {
.set_pio_mode = piix_set_pio_mode,
.set_dma_mode = piix_set_dma_mode,
.clear_irq = ich_clear_irq,
.cable_detect = piix_cable_detect,
};
#ifndef CONFIG_IA64
#define IDE_HFLAGS_PIIX IDE_HFLAG_LEGACY_IRQS
#else
@ -331,9 +338,9 @@ static const struct ide_port_ops piix_port_ops = {
{ \
.name = DRV_NAME, \
.init_chipset = init_chipset_ich, \
.init_hwif = init_hwif_ich, \
.init_hwif = init_hwif_piix, \
.enablebits = {{0x41,0x80,0x80}, {0x43,0x80,0x80}}, \
.port_ops = &piix_port_ops, \
.port_ops = &ich_port_ops, \
.host_flags = IDE_HFLAGS_PIIX, \
.pio_mask = ATA_PIO4, \
.swdma_mask = ATA_SWDMA2_ONLY, \

4
include/linux/ide.h
View File

@ -704,6 +704,7 @@ extern const struct ide_tp_ops default_tp_ops;
* @resetproc: routine to reset controller after a disk reset
* @maskproc: special host masking for drive selection
* @quirkproc: check host's drive quirk list
* @clear_irq: clear IRQ
*
* @mdma_filter: filter MDMA modes
* @udma_filter: filter UDMA modes
@ -720,6 +721,7 @@ struct ide_port_ops {
void (*resetproc)(ide_drive_t *);
void (*maskproc)(ide_drive_t *, int);
void (*quirkproc)(ide_drive_t *);
void (*clear_irq)(ide_drive_t *);
u8 (*mdma_filter)(ide_drive_t *);
u8 (*udma_filter)(ide_drive_t *);
@ -782,8 +784,6 @@ typedef struct hwif_s {
const struct ide_port_ops *port_ops;
const struct ide_dma_ops *dma_ops;
void (*ide_dma_clear_irq)(ide_drive_t *drive);
/* dma physical region descriptor table (cpu view) */
unsigned int *dmatable_cpu;
/* dma physical region descriptor table (dma view) */