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ide-cd: simplify request issuing path

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Call cdrom_start_packet_command() only from the ->do_request() routine.
As a nice side effect, this improves code readability a bit.

There should be no functionality change resulting from this patch.

Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Borislav Petkov 2008-07-16 20:33:46 +02:00 committed by Bartlomiej Zolnierkiewicz
parent 99384aeafe
commit b6ca440a8f
1 changed files with 21 additions and 18 deletions
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39
drivers/ide/ide-cd.c
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@ -753,14 +753,12 @@ static ide_startstop_t cdrom_start_seek_continuation(ide_drive_t *drive)
return cdrom_transfer_packet_command(drive, rq, &cdrom_seek_intr);
}
static ide_startstop_t cdrom_start_seek(ide_drive_t *drive)
static void cdrom_start_seek(ide_drive_t *drive)
{
struct cdrom_info *info = drive->driver_data;
info->dma = 0;
info->start_seek = jiffies;
return cdrom_start_packet_command(drive, 0,
cdrom_start_seek_continuation);
}
/*
@ -1135,8 +1133,7 @@ static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
if (write)
cd->devinfo.media_written = 1;
/* start sending the read/write request to the drive */
return cdrom_start_packet_command(drive, 32768, cdrom_start_rw_cont);
return ide_started;
}
static ide_startstop_t cdrom_do_newpc_cont(ide_drive_t *drive)
@ -1149,7 +1146,7 @@ static ide_startstop_t cdrom_do_newpc_cont(ide_drive_t *drive)
return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr);
}
static ide_startstop_t cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
{
struct cdrom_info *info = drive->driver_data;
@ -1188,10 +1185,6 @@ static ide_startstop_t cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
((unsigned long)current->stack & stack_mask)))
info->dma = 0;
}
/* start sending the command to the drive */
return cdrom_start_packet_command(drive, rq->data_len,
cdrom_do_newpc_cont);
}
/*
@ -1200,8 +1193,9 @@ static ide_startstop_t cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
sector_t block)
{
ide_startstop_t action;
struct cdrom_info *info = drive->driver_data;
ide_handler_t *fn;
int xferlen;
if (blk_fs_request(rq)) {
if (info->cd_flags & IDE_CD_FLAG_SEEKING) {
@ -1221,16 +1215,23 @@ static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
}
if (rq_data_dir(rq) == READ &&
IDE_LARGE_SEEK(info->last_block, block,
IDECD_SEEK_THRESHOLD) &&
drive->dsc_overlap)
action = cdrom_start_seek(drive);
else
action = cdrom_start_rw(drive, rq);
IDECD_SEEK_THRESHOLD) &&
drive->dsc_overlap) {
xferlen = 0;
fn = cdrom_start_seek_continuation;
cdrom_start_seek(drive);
} else {
xferlen = 32768;
fn = cdrom_start_rw_cont;
if (cdrom_start_rw(drive, rq) == ide_stopped)
return ide_stopped;
}
info->last_block = block;
return action;
} else if (blk_sense_request(rq) || blk_pc_request(rq) ||
rq->cmd_type == REQ_TYPE_ATA_PC) {
return cdrom_do_block_pc(drive, rq);
xferlen = rq->data_len;
fn = cdrom_do_newpc_cont;
cdrom_do_block_pc(drive, rq);
} else if (blk_special_request(rq)) {
/* right now this can only be a reset... */
cdrom_end_request(drive, 1);
@ -1240,6 +1241,8 @@ static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
cdrom_end_request(drive, 0);
return ide_stopped;
}
return cdrom_start_packet_command(drive, xferlen, fn);
}