[PATCH 6/6] ide-atapi: teach ide atapi about drive->waiting_for_dma

Borislav Petkov
2008-12-04T06:45:47Z

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>
---
drivers/ide/ide-atapi.c | 7 +++++++
1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/drivers/ide/ide-atapi.c b/drivers/ide/ide-atapi.c
index bb867a0..a43bed3 100644
--- a/drivers/ide/ide-atapi.c
+++ b/drivers/ide/ide-atapi.c
@@ -543,6 +543,11 @@ 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)
@@ -639,6 +644,8 @@ 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, expiry);
return ide_started;
--
1.6.0.4