Gitweb: http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=90eb80...
Commit: 90eb808e0fd3cbda8a8b085238930c533f603642
Parent: e529c6087a845e64a6a36a2d17b8754b20bc7c0d
Author: Borislav Petkov <petkovbb@googlemail.com>
AuthorDate: Wed Jul 16 20:33:46 2008 +0200
Committer: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
CommitDate: Wed Jul 16 20:33:46 2008 +0200
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 <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
---
drivers/ide/ide-cd.c | 28 +++++++++++++++++++---------
1 files changed, 19 insertions(+), 9 deletions(-)
diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
index 275d5ba..9e593ce 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) ||
--
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