ide-cd: mark REQ_TYPE_ATA_PC write requests with REQ_RW flag

On Thursday 06 March 2008, walt wrote:

> For me, this commit causes the problem it's intended to fix:
> 
> commit 9f10d9ee0ac6d79d7bc8b9a158bf4a29322d84d3
> Author: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
> Date:   Tue Feb 26 21:50:35 2008 +0100
> 
>      ide-cd: fix 'ireason' handling for REQ_TYPE_ATA_PC requests
> 
>      This fixes some hangs caused by not finishing the transfer before ending
>      the request and also makes use of 'ireason == 1' quirk for spurious IRQs.
> 
> When I mount a CD there is a long delay, and I see this error message:
> 
> hdc: ide_cd_check_ireason: wrong transfer direction!
> cdrom: failed setting lba address space
> hdc: status error: status=0x58 { DriveReady SeekComplete DataRequest }
> ide: failed opcode was: unknown
> hdc: drive not ready for command
> <repeated many times>
> 
> When I revert this commit everything works properly again, including
> CD burning.

It turned out that REQ_TYPE_ATA_PC write requests were not marked as such
(the previous commit assumed them to be).

Reported-by: walt <w41ter@gmail.com>
Tested-by: walt <w41ter@gmail.com>
Reviewed-by: Borislav Petkov <petkovbb@googlemail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

drivers/ide/ide-cd_ioctl.c

@@ -457,6 +457,10 @@ int ide_cdrom_packet(struct cdrom_device_info *cdi,
 	   layer. the packet must be complete, as we do not
 	   touch it at all. */
 	ide_cd_init_rq(drive, &req);
+
+	if (cgc->data_direction == CGC_DATA_WRITE)
+		req.cmd_flags |= REQ_RW;
+
 	memcpy(req.cmd, cgc->cmd, CDROM_PACKET_SIZE);
 	if (cgc->sense)
 		memset(cgc->sense, 0, sizeof(struct request_sense));