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ide-atapi: accomodate transfer length calculation for ide-cd

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... by factoring it out of ide_cd_do_request() into a helper, as suggested by
Bart.

There should be no functionality change resulting from this patch.

Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
[bart: BLK_DEV_IDECD needs to select IDE_ATAPI now]
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Borislav Petkov
2009-01-02 16:12:52 +01:00
committed by Bartlomiej Zolnierkiewicz
parent 4f02ff06b4
commit 392de1d53d
4 changed files with 19 additions and 3 deletions
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15
drivers/ide/ide-atapi.c
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@@ -252,6 +252,18 @@ int ide_scsi_expiry(ide_drive_t *drive)
}
EXPORT_SYMBOL_GPL(ide_scsi_expiry);
int ide_cd_get_xferlen(struct request *rq)
{
if (blk_fs_request(rq))
return 32768;
else if (blk_sense_request(rq) || blk_pc_request(rq) ||
rq->cmd_type == REQ_TYPE_ATA_PC)
return rq->data_len;
else
return 0;
}
EXPORT_SYMBOL_GPL(ide_cd_get_xferlen);
/*
* This is the usual interrupt handler which will be called during a packet
* command. We will transfer some of the data (as requested by the drive)
@@ -551,7 +563,7 @@ ide_startstop_t ide_issue_pc(ide_drive_t *drive, unsigned int timeout,
struct ide_atapi_pc *pc = drive->pc;
ide_hwif_t *hwif = drive->hwif;
u32 tf_flags;
u16 bcount = 0;
u16 bcount;
u8 scsi = !!(drive->dev_flags & IDE_DFLAG_SCSI);
/* We haven't transferred any data yet */
@@ -560,6 +572,7 @@ ide_startstop_t ide_issue_pc(ide_drive_t *drive, unsigned int timeout,
if (dev_is_idecd(drive)) {
tf_flags = IDE_TFLAG_OUT_NSECT | IDE_TFLAG_OUT_LBAL;
bcount = ide_cd_get_xferlen(hwif->hwgroup->rq);
} else if (scsi) {
tf_flags = 0;
bcount = min(pc->req_xfer, 63 * 1024);