From 392de1d53dd40e2eebee3a0a26aa647a3865ca78 Mon Sep 17 00:00:00 2001 From: Borislav Petkov Date: Fri, 2 Jan 2009 16:12:52 +0100 Subject: ide-atapi: accomodate transfer length calculation for ide-cd ... 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 [bart: BLK_DEV_IDECD needs to select IDE_ATAPI now] Signed-off-by: Bartlomiej Zolnierkiewicz --- drivers/ide/ide-atapi.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) (limited to 'drivers/ide/ide-atapi.c') diff --git a/drivers/ide/ide-atapi.c b/drivers/ide/ide-atapi.c index 74273fdc882..8884877bd2b 100644 --- a/drivers/ide/ide-atapi.c +++ b/drivers/ide/ide-atapi.c @@ -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); -- cgit v1.2.3-18-g5258