Commit 63b1623e authored by Bartlomiej Zolnierkiewicz's avatar Bartlomiej Zolnierkiewicz
Browse files

alim15x3: add "wdc_udma" module parameter 



Add "wdc_udma" module parameter for allowing UDMA transfers
on M1543C-E chipset for WDC disks.

Signed-off-by: default avatarBartlomiej Zolnierkiewicz <bzolnier@gmail.com>
parent 2bf111d9

drivers/ide/pci/alim15x3.c

+13 −2
Original line number Diff line number Diff line
@@ -38,6 +38,16 @@ 


#include <asm/io.h>



/*

 * Allow UDMA on M1543C-E chipset for WDC disks that ignore CRC checking

 * (this is DANGEROUS and could result in data corruption).

 */

static int wdc_udma;



module_param(wdc_udma, bool, 0);

MODULE_PARM_DESC(wdc_udma,

		 "allow UDMA on M1543C-E chipset for WDC disks (DANGEROUS)");



/*

 *	ALi devices are not plug in. Otherwise these static values would

 *	need to go. They ought to go away anyway
@@ -116,7 +126,7 @@ static void ali_set_pio_mode(ide_drive_t *drive, const u8 pio) 
 *	The actual rules for the ALi are:

 *		No UDMA on revisions <= 0x20

 *		Disk only for revisions < 0xC2

 *		Not WDC drives for revisions < 0xC2

 *		Not WDC drives on M1543C-E (?)

 *

 *	FIXME: WDC ifdef needs to die

 */
@@ -127,7 +137,8 @@ static u8 ali_udma_filter(ide_drive_t *drive) 
		if (drive->media != ide_disk)

			return 0;

#ifndef CONFIG_WDC_ALI15X3

		if (chip_is_1543c_e && strstr(drive->id->model, "WDC "))

		if (chip_is_1543c_e && strstr(drive->id->model, "WDC ") &&

		    wdc_udma == 0)

			return 0;

#endif

	}