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Commit 6dd87233 authored by Bartlomiej Zolnierkiewicz's avatar Bartlomiej Zolnierkiewicz
Browse files

ide: fix registers loading order for IDE_NSECTOR_REG in execute_drive_cmd() 



Move loading of IDE_NSECTOR_REG from ide_cmd() to execute_drive_cmd()
(load the IDE_NSECTOR_REG just after IDE_FEATURE_REG).

This also allows us to drop 'nsect' argument from ide_cmd() and simplify
execute_drive_cmd() code for REQ_TYPE_ATA_CMD case a bit.

It shouldn't affect anything (just a usual paranoia to separate changes
which change the way in which hardware is accessed from code cleanups).

Signed-off-by: default avatarBartlomiej Zolnierkiewicz <bzolnier@gmail.com>
parent 46f26c36

drivers/ide/ide-io.c

+8 −11
Original line number Diff line number Diff line
@@ -624,21 +624,18 @@ ide_startstop_t ide_abort(ide_drive_t *drive, const char *msg) 
 *	ide_cmd		-	issue a simple drive command

 *	@drive: drive the command is for

 *	@cmd: command byte

 *	@nsect: sector byte

 *	@handler: handler for the command completion

 *

 *	Issue a simple drive command with interrupts.

 *	The drive must be selected beforehand.

 */



static void ide_cmd (ide_drive_t *drive, u8 cmd, u8 nsect,

		ide_handler_t *handler)

static void ide_cmd(ide_drive_t *drive, u8 cmd, ide_handler_t *handler)

{

	ide_hwif_t *hwif = HWIF(drive);

	if (IDE_CONTROL_REG)

		hwif->OUTB(drive->ctl,IDE_CONTROL_REG);	/* clear nIEN */

	SELECT_MASK(drive,0);

	hwif->OUTB(nsect,IDE_NSECTOR_REG);

	ide_execute_command(drive, cmd, handler, WAIT_CMD, NULL);

}
@@ -913,11 +910,12 @@ static ide_startstop_t execute_drive_cmd (ide_drive_t *drive, 
 		printk("sel=0x%02x\n", args[6]);

#endif

 		hwif->OUTB(args[1], IDE_FEATURE_REG);

		hwif->OUTB(args[2], IDE_NSECTOR_REG);

 		hwif->OUTB(args[3], IDE_SECTOR_REG);

 		hwif->OUTB(args[4], IDE_LCYL_REG);

 		hwif->OUTB(args[5], IDE_HCYL_REG);

 		hwif->OUTB((args[6] & 0xEF)|drive->select.all, IDE_SELECT_REG);

 		ide_cmd(drive, args[0], args[2], &drive_cmd_intr);

		ide_cmd(drive, args[0], &drive_cmd_intr);

 		return ide_started;

 	} else if (rq->cmd_type == REQ_TYPE_ATA_CMD) {

 		u8 *args = rq->buffer;
@@ -931,16 +929,15 @@ static ide_startstop_t execute_drive_cmd (ide_drive_t *drive, 
 		printk("fr=0x%02x ", args[2]);

 		printk("xx=0x%02x\n", args[3]);

#endif

 		if (args[0] == WIN_SMART) {

		hwif->OUTB(args[2], IDE_FEATURE_REG);

 		if (args[0] == WIN_SMART) {

			hwif->OUTB(args[3],IDE_NSECTOR_REG);

 			hwif->OUTB(args[1],IDE_SECTOR_REG);

			hwif->OUTB(0x4f, IDE_LCYL_REG);

			hwif->OUTB(0xc2, IDE_HCYL_REG);

 			ide_cmd(drive, args[0], args[3], &drive_cmd_intr);

 			return ide_started;

 		}

 		hwif->OUTB(args[2],IDE_FEATURE_REG);

 		ide_cmd(drive, args[0], args[1], &drive_cmd_intr);

		} else

			hwif->OUTB(args[1], IDE_NSECTOR_REG);

		ide_cmd(drive, args[0], &drive_cmd_intr);

 		return ide_started;

 	}