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| author | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2008-01-26 20:13:12 +0100 |
|---|---|---|
| committer | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2008-01-26 20:13:12 +0100 |
| commit | 18a056feccabdfa9764016a615121b194828bc72 (patch) | |
| tree | 498c07b229e9a6965613484041b30db61f6ef132 /drivers/ide | |
| parent | 852738f39258deafb3d89c187cb1a4050820d555 (diff) | |
| download | blackbird-op-linux-18a056feccabdfa9764016a615121b194828bc72.tar.gz blackbird-op-linux-18a056feccabdfa9764016a615121b194828bc72.zip | |
ide: don't enable local IRQs for PIO-in in driver_cmd_intr() (take 2)
Don't enable local IRQs for PIO-in protocol in driver_cmd_intr().
While at it:
* Remove redundant rq->cmd_type check.
* Read status register after enabling local IRQs for no-data protocol.
v2:
* Re-add DRQ=1 check lost in v1 (noticed by Sergei).
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Diffstat (limited to 'drivers/ide')
| -rw-r--r-- | drivers/ide/ide-io.c | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/drivers/ide/ide-io.c b/drivers/ide/ide-io.c index 8c9890414eb2..dc6af24a97d9 100644 --- a/drivers/ide/ide-io.c +++ b/drivers/ide/ide-io.c @@ -638,19 +638,22 @@ static ide_startstop_t drive_cmd_intr (ide_drive_t *drive) { struct request *rq = HWGROUP(drive)->rq; ide_hwif_t *hwif = HWIF(drive); - u8 *args = (u8 *) rq->buffer; - u8 stat = hwif->INB(IDE_STATUS_REG); + u8 *args = (u8 *)rq->buffer, pio_in = (args && args[3]) ? 1 : 0, stat; - local_irq_enable_in_hardirq(); - if (rq->cmd_type == REQ_TYPE_ATA_CMD && - (stat & DRQ_STAT) && args && args[3]) { + if (pio_in) { u8 io_32bit = drive->io_32bit; + stat = hwif->INB(IDE_STATUS_REG); + if ((stat & DRQ_STAT) == 0) + goto out; drive->io_32bit = 0; hwif->ata_input_data(drive, &args[4], args[3] * SECTOR_WORDS); drive->io_32bit = io_32bit; stat = wait_drive_not_busy(drive); + } else { + local_irq_enable_in_hardirq(); + stat = hwif->INB(IDE_STATUS_REG); } - +out: if (!OK_STAT(stat, READY_STAT, BAD_STAT)) return ide_error(drive, "drive_cmd", stat); /* calls ide_end_drive_cmd */ |
