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pdc202xx_old: don't call pdc202xx_reset() on IRQ timeout 

The driver's dma_lost_irq() and dma_clear() methods call pdc202xx_reset()
which resets both channels at once -- most probably by driving RESET- on them.
Not only such reset can severely disturb concurrent operations on another
channel, it is also a clear overkill (especially in the first case) and is
completely unexpected and thus not properly handled by the IDE core in this
context (in the second case the usual SRST reset would most probably ensue
anyway though); it also causes quite arbitrary 2-second delay. Hence, use the
standard ide_dma_lost_irq() method and don't install the optional dma_clear()
method at all -- the driver should do well without this age-old cruft...

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Sergei Shtylyov 2009-06-07 15:37:04 +02:00 committed by Bartlomiej Zolnierkiewicz
parent 72b9304f04
commit 1221e241e3
1 changed files with 1 additions and 8 deletions
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9
drivers/ide/pdc202xx_old.c
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@ -219,12 +219,6 @@ static void pdc202xx_reset(ide_drive_t *drive)
ide_set_max_pio(drive); ide_set_max_pio(drive);
} }
static void pdc202xx_dma_lost_irq(ide_drive_t *drive)
{
pdc202xx_reset(drive);
ide_dma_lost_irq(drive);
}
static int init_chipset_pdc202xx(struct pci_dev *dev) static int init_chipset_pdc202xx(struct pci_dev *dev)
{ {
unsigned long dmabase = pci_resource_start(dev, 4); unsigned long dmabase = pci_resource_start(dev, 4);
@ -295,9 +289,8 @@ static const struct ide_dma_ops pdc2026x_dma_ops = {
.dma_start = pdc202xx_dma_start, .dma_start = pdc202xx_dma_start,
.dma_end = pdc202xx_dma_end, .dma_end = pdc202xx_dma_end,
.dma_test_irq = ide_dma_test_irq, .dma_test_irq = ide_dma_test_irq,
.dma_lost_irq = pdc202xx_dma_lost_irq, .dma_lost_irq = ide_dma_lost_irq,
.dma_timer_expiry = ide_dma_sff_timer_expiry, .dma_timer_expiry = ide_dma_sff_timer_expiry,
.dma_clear = pdc202xx_reset,
.dma_sff_read_status = ide_dma_sff_read_status, .dma_sff_read_status = ide_dma_sff_read_status,
}; };