From 90eb808e0fd3cbda8a8b085238930c533f603642 Mon Sep 17 00:00:00 2001 From: Borislav Petkov Date: Wed, 16 Jul 2008 20:33:46 +0200 Subject: [PATCH] ide-cd: move request prep from cdrom_start_rw_cont to rq issue path ... by factoring out the rq preparation code into a separate function called in the request routine. As a nice side effect, this minimizes the IRQ handler execution time. There should be no functionality change resulting from this patch. [bart: s/HWGROUP()/drive->hwif->hwgroup/ and remove extra newline] Signed-off-by: Borislav Petkov Signed-off-by: Bartlomiej Zolnierkiewicz --- drivers/ide/ide-cd.c | 28 +++++++++++++++++++--------- 1 file changed, 19 insertions(+), 9 deletions(-) diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c index 275d5ba120..9e593cebc0 100644 --- a/drivers/ide/ide-cd.c +++ b/drivers/ide/ide-cd.c @@ -666,16 +666,9 @@ static int ide_cd_check_transfer_size(ide_drive_t *drive, int len) static ide_startstop_t cdrom_newpc_intr(ide_drive_t *); -/* - * Routine to send a read/write packet command to the drive. This is usually - * called directly from cdrom_start_{read,write}(). However, for drq_interrupt - * devices, it is called from an interrupt when the drive is ready to accept - * the command. - */ -static ide_startstop_t cdrom_start_rw_cont(ide_drive_t *drive) +static ide_startstop_t ide_cd_prepare_rw_request(ide_drive_t *drive, + struct request *rq) { - struct request *rq = HWGROUP(drive)->rq; - if (rq_data_dir(rq) == READ) { unsigned short sectors_per_frame = queue_hardsect_size(drive->queue) >> SECTOR_BITS; @@ -712,6 +705,19 @@ static ide_startstop_t cdrom_start_rw_cont(ide_drive_t *drive) /* set up the command */ rq->timeout = ATAPI_WAIT_PC; + return ide_started; +} + +/* + * Routine to send a read/write packet command to the drive. This is usually + * called directly from cdrom_start_{read,write}(). However, for drq_interrupt + * devices, it is called from an interrupt when the drive is ready to accept + * the command. + */ +static ide_startstop_t cdrom_start_rw_cont(ide_drive_t *drive) +{ + struct request *rq = drive->hwif->hwgroup->rq; + /* send the command to the drive and return */ return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr); } @@ -1224,8 +1230,12 @@ static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq, } else { xferlen = 32768; fn = cdrom_start_rw_cont; + if (cdrom_start_rw(drive, rq) == ide_stopped) return ide_stopped; + + if (ide_cd_prepare_rw_request(drive, rq) == ide_stopped) + return ide_stopped; } info->last_block = block; } else if (blk_sense_request(rq) || blk_pc_request(rq) || -- 2.39.5