diff options
Diffstat (limited to 'drivers/ide/ide-io.c')
| -rw-r--r-- | drivers/ide/ide-io.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/ide/ide-io.c b/drivers/ide/ide-io.c index 574855456d45..bbad32f3ca2c 100644 --- a/drivers/ide/ide-io.c +++ b/drivers/ide/ide-io.c @@ -1561,6 +1561,17 @@ irqreturn_t ide_intr (int irq, void *dev_id, struct pt_regs *regs) 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 (drive->unmask) local_irq_enable(); /* service this interrupt, may set handler for next interrupt */ |