From: Bartlomiej Zolnierkiewicz Date: Sat, 26 Jan 2008 19:13:12 +0000 (+0100) Subject: ide: don't enable local IRQs for PIO-in in driver_cmd_intr() (take 2) X-Git-Tag: v2.6.25-rc1~1227^2~5 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=18a056feccabdfa9764016a615121b194828bc72;p=linux-2.6 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 Signed-off-by: Bartlomiej Zolnierkiewicz --- diff --git a/drivers/ide/ide-io.c b/drivers/ide/ide-io.c index 8c9890414e..dc6af24a97 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 */