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ide-atapi: teach ide atapi about drive->waiting_for_dma

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In addition, we wait for DRQ to be asserted by repeatedly polling
device status no matter what DRQ type each device implements.

Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Borislav Petkov 2009-01-02 16:12:53 +01:00 committed by Bartlomiej Zolnierkiewicz
parent 392de1d53d
commit 5f25843fa7
1 changed files with 7 additions and 0 deletions
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7
drivers/ide/ide-atapi.c
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@ -511,6 +511,11 @@ static ide_startstop_t ide_transfer_pc(ide_drive_t *drive)
return startstop;
}
if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) {
if (drive->dma)
drive->waiting_for_dma = 1;
}
ireason = ide_read_ireason(drive);
if (drive->media == ide_tape &&
(drive->dev_flags & IDE_DFLAG_SCSI) == 0)
@ -605,6 +610,8 @@ ide_startstop_t ide_issue_pc(ide_drive_t *drive, unsigned int timeout,
/* Issue the packet command */
if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) {
if (drive->dma)
drive->waiting_for_dma = 0;
ide_execute_command(drive, ATA_CMD_PACKET, ide_transfer_pc,
timeout, NULL);
return ide_started;