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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>
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1 changed files with 1 additions and 8 deletions
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@ -219,12 +219,6 @@ static void pdc202xx_reset(ide_drive_t *drive)
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ide_set_max_pio(drive);
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}
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static void pdc202xx_dma_lost_irq(ide_drive_t *drive)
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{
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pdc202xx_reset(drive);
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ide_dma_lost_irq(drive);
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}
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static int init_chipset_pdc202xx(struct pci_dev *dev)
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{
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unsigned long dmabase = pci_resource_start(dev, 4);
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@ -295,9 +289,8 @@ static const struct ide_dma_ops pdc2026x_dma_ops = {
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.dma_start = pdc202xx_dma_start,
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.dma_end = pdc202xx_dma_end,
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.dma_test_irq = ide_dma_test_irq,
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.dma_lost_irq = pdc202xx_dma_lost_irq,
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.dma_lost_irq = ide_dma_lost_irq,
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.dma_timer_expiry = ide_dma_sff_timer_expiry,
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.dma_clear = pdc202xx_reset,
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.dma_sff_read_status = ide_dma_sff_read_status,
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};
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