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Commit d83fca58 authored by Bartlomiej Zolnierkiewicz's avatar Bartlomiej Zolnierkiewicz
Browse files

sis5513: clear prefetch and postwrite for ATAPI devices 



Clear prefetch and postwrite for ATAPI devices instead of depending on BIOS.

Acked-by: default avatarSergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: default avatarBartlomiej Zolnierkiewicz <bzolnier@gmail.com>
parent 1c54a93d

drivers/ide/pci/sis5513.c

+6 −7
Original line number Diff line number Diff line 
/*

 * 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, &reg4bh);



	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);

}