Gitweb: http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=b4ab72...
Commit: b4ab726c92f8a2c1635958212e8933309de0a37a
Parent: c9f56a801a3a9d76119868a687bc220d29055625
Author: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
AuthorDate: Fri Feb 1 23:09:26 2008 +0100
Committer: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
CommitDate: Fri Feb 1 23:09:26 2008 +0100
ide-cd: add ide_cd_drain_data() helper
Add ide_cd_drain_data() and use it in cdrom_{buffer_sectors,read_intr}()
(as a nice side-effect this cuts 0.5kB of code from ide-cd.o).
There should be no functionality changes caused by this patch.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
---
drivers/ide/ide-cd.c | 28 +++++++++++++++-------------
1 files changed, 15 insertions(+), 13 deletions(-)
diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
index 6c31ce1..f0191f0 100644
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -626,6 +626,16 @@ static void ide_cd_pad_transfer(ide_drive_t *drive, xfer_func_t *xf, int len)
}
}
+static void ide_cd_drain_data(ide_drive_t *drive, int nsects)
+{
+ while (nsects > 0) {
+ static char dum[SECTOR_SIZE];
+
+ drive->hwif->atapi_input_bytes(drive, dum, sizeof(dum));
+ nsects--;
+ }
+}
+
/*
* Buffer up to SECTORS_TO_TRANSFER sectors from the drive in our sector
* buffer. Once the first sector is added, any subsequent sectors are
@@ -664,11 +674,7 @@ static void cdrom_buffer_sectors (ide_drive_t *drive, unsigned long sector,
}
/* Throw away any remaining data. */
- while (sectors_to_transfer > 0) {
- static char dum[SECTOR_SIZE];
- HWIF(drive)->atapi_input_bytes(drive, dum, sizeof (dum));
- --sectors_to_transfer;
- }
+ ide_cd_drain_data(drive, sectors_to_transfer);
}
/*
@@ -791,14 +797,10 @@ static ide_startstop_t cdrom_read_intr (ide_drive_t *drive)
any of the leading sectors. */
nskip = min_t(int, rq->current_nr_sectors - bio_cur_sectors(rq->bio), sectors_to_transfer);
- while (nskip > 0) {
- /* We need to throw away a sector. */
- static char dum[SECTOR_SIZE];
- HWIF(drive)->atapi_input_bytes(drive, dum, sizeof (dum));
-
- --rq->current_nr_sectors;
- --nskip;
- --sectors_to_transfer;
+ if (nskip > 0) {
+ ide_cd_drain_data(drive, nskip);
+ rq->current_nr_sectors -= nskip;
+ sectors_to_transfer -= nskip;
}
/* Now loop while we still have data to read from the drive. */
-
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