diff options
| author | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2007-10-16 22:29:56 +0200 |
|---|---|---|
| committer | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2007-10-16 22:29:56 +0200 |
| commit | d83fca58d3229f3b23a92a72c3428da8faf09940 (patch) | |
| tree | 1016793cbc220d2045c6fd6a104bdb337264527c /drivers/ide/pci | |
| parent | it8213/piix/slc90e66: "de-couple" PIO and UDMA modes (diff) | |
| download | linux-d83fca58d3229f3b23a92a72c3428da8faf09940.tar.xz linux-d83fca58d3229f3b23a92a72c3428da8faf09940.zip | |
sis5513: clear prefetch and postwrite for ATAPI devices
Clear prefetch and postwrite for ATAPI devices instead of depending on BIOS.
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Diffstat (limited to 'drivers/ide/pci')
| -rw-r--r-- | drivers/ide/pci/sis5513.c | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/drivers/ide/pci/sis5513.c b/drivers/ide/pci/sis5513.c index 45666b45231a..f9117a83fcf0 100644 --- a/drivers/ide/pci/sis5513.c +++ b/drivers/ide/pci/sis5513.c @@ -1,5 +1,5 @@ /* - * linux/drivers/ide/pci/sis5513.c Version 0.29 Aug 1, 2007 + * linux/drivers/ide/pci/sis5513.c Version 0.30 Aug 9, 2007 * * Copyright (C) 1999-2000 Andre Hedrick <andre@linux-ide.org> * Copyright (C) 2002 Lionel Bouton <Lionel.Bouton@inet6.fr>, Maintainer @@ -522,20 +522,19 @@ static void sis_program_timings(ide_drive_t *drive, const u8 mode) sis_ata133_program_timings(drive, mode); } -/* Enables per-drive prefetch and postwrite */ static void config_drive_art_rwp (ide_drive_t *drive) { ide_hwif_t *hwif = HWIF(drive); struct pci_dev *dev = hwif->pci_dev; - u8 reg4bh = 0; - u8 rw_prefetch = (0x11 << drive->dn); + u8 rw_prefetch = 0; - if (drive->media != ide_disk) - return; pci_read_config_byte(dev, 0x4b, ®4bh); - if ((reg4bh & rw_prefetch) != rw_prefetch) + if (drive->media == ide_disk) + rw_prefetch = 0x11 << drive->dn; + + if ((reg4bh & (0x11 << drive->dn)) != rw_prefetch) pci_write_config_byte(dev, 0x4b, reg4bh|rw_prefetch); } |