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| author |   Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2008-07-15 21:22:03 +0200 |
|---|---|---|
| committer | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2008-07-15 21:22:03 +0200 |
| commit | 55d82bfa6763d6761670d740ab3bac2f1c042d87 (patch) | |
| tree | dd5e13c6c4801a4853ee0ce5f11469ab05ba6c31 /drivers/scsi | |
| parent | ide-scsi: add more debugging to idescsi_pc_intr() (diff) | |
| download | linux-dev-55d82bfa6763d6761670d740ab3bac2f1c042d87.tar.xz linux-dev-55d82bfa6763d6761670d740ab3bac2f1c042d87.zip | |
ide-{floppy,scsi}: read Status Register before stopping DMA engine
Read Status Register before stopping DMA engine to match ide-tape
device driver - it should be safe and shouldn't affect anything.
This is a preparation for adding generic ide_pc_intr() helper.
Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Diffstat (limited to 'drivers/scsi')
| -rw-r--r-- | drivers/scsi/ide-scsi.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/scsi/ide-scsi.c b/drivers/scsi/ide-scsi.c index ec9a5de2e75e..ada733ca6725 100644 --- a/drivers/scsi/ide-scsi.c +++ b/drivers/scsi/ide-scsi.c @@ -370,6 +370,10 @@ static ide_startstop_t idescsi_pc_intr (ide_drive_t *drive) pc->callback(drive); return ide_stopped; } + + /* Clear the interrupt */ + stat = ide_read_status(drive); + if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) { if (hwif->dma_ops->dma_end(drive)) pc->flags |= PC_FLAG_DMA_ERROR; @@ -378,9 +382,6 @@ static ide_startstop_t idescsi_pc_intr (ide_drive_t *drive) debug_log("%s: DMA finished\n", drive->name); } - /* Clear the interrupt */ - stat = ide_read_status(drive); - if ((stat & DRQ_STAT) == 0) { /* No more interrupts */ debug_log("Packet command completed, %d bytes transferred\n", |