ide-cd: move request prep from cdrom_start_seek_continuation 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 newlines]

Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

1 files changed, 10 insertions, 2 deletions

diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
index 66d82c1b16eb..275d5ba12027 100644
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -738,9 +738,8 @@ static ide_startstop_t cdrom_seek_intr(ide_drive_t *drive)
         return ide_stopped;
 }
 
-static ide_startstop_t cdrom_start_seek_continuation(ide_drive_t *drive)
+static void ide_cd_prepare_seek_request(ide_drive_t *drive, struct request *rq)
 {
-        struct request *rq = HWGROUP(drive)->rq;
         sector_t frame = rq->sector;
 
         sector_div(frame, queue_hardsect_size(drive->queue) >> SECTOR_BITS);
@@ -750,6 +749,12 @@ static ide_startstop_t cdrom_start_seek_continuation(ide_drive_t *drive)
         put_unaligned(cpu_to_be32(frame), (unsigned int *) &rq->cmd[2]);
 
         rq->timeout = ATAPI_WAIT_PC;
+}
+
+static ide_startstop_t cdrom_start_seek_continuation(ide_drive_t *drive)
+{
+        struct request *rq = drive->hwif->hwgroup->rq;
+
         return cdrom_transfer_packet_command(drive, rq, &cdrom_seek_intr);
 }
 
@@ -1211,8 +1216,11 @@ static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
                     drive->dsc_overlap) {
                         xferlen = 0;
                         fn = cdrom_start_seek_continuation;
+
                         info->dma = 0;
                         info->start_seek = jiffies;
+
+                        ide_cd_prepare_seek_request(drive, rq);
                 } else {
                         xferlen = 32768;
                         fn = cdrom_start_rw_cont;