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Commit 57b55275 authored by Bartlomiej Zolnierkiewicz's avatar Bartlomiej Zolnierkiewicz
Browse files

ide-probe: remove needless Status register reads 



* Cache value read from the Status register in 'stat' variable in do_probe()
  and enable_nest(), then remove remove needless Status register reads.

While at it:

* Add proper KERN_* levels to printk() calls.

Signed-off-by: default avatarBartlomiej Zolnierkiewicz <bzolnier@gmail.com>
parent b187dfee

drivers/ide/ide-probe.c

+21 −14
Original line number Diff line number Diff line
@@ -423,8 +423,9 @@ static int ide_busy_sleep(ide_hwif_t *hwif) 


static int do_probe (ide_drive_t *drive, u8 cmd)

{

	int rc;

	ide_hwif_t *hwif = HWIF(drive);

	int rc;

	u8 stat;



	if (drive->present) {

		/* avoid waiting for inappropriate probes */
@@ -461,15 +462,17 @@ static int do_probe (ide_drive_t *drive, u8 cmd) 
			/* failed: try again */

			rc = try_to_identify(drive,cmd);

		}

		if (hwif->INB(IDE_STATUS_REG) == (BUSY_STAT|READY_STAT))



		stat = hwif->INB(IDE_STATUS_REG);



		if (stat == (BUSY_STAT | READY_STAT))

			return 4;



		if ((rc == 1 && cmd == WIN_PIDENTIFY) &&

			((drive->autotune == IDE_TUNE_DEFAULT) ||

			(drive->autotune == IDE_TUNE_AUTO))) {

			printk("%s: no response (status = 0x%02x), "

				"resetting drive\n", drive->name,

				hwif->INB(IDE_STATUS_REG));

			printk(KERN_ERR "%s: no response (status = 0x%02x), "

					"resetting drive\n", drive->name, stat);

			msleep(50);

			hwif->OUTB(drive->select.all, IDE_SELECT_REG);

			msleep(50);
@@ -477,11 +480,13 @@ static int do_probe (ide_drive_t *drive, u8 cmd) 
			(void)ide_busy_sleep(hwif);

			rc = try_to_identify(drive, cmd);

		}



		/* ensure drive IRQ is clear */

		stat = hwif->INB(IDE_STATUS_REG);



		if (rc == 1)

			printk("%s: no response (status = 0x%02x)\n",

				drive->name, hwif->INB(IDE_STATUS_REG));

		/* ensure drive irq is clear */

		(void) hwif->INB(IDE_STATUS_REG);

			printk(KERN_ERR "%s: no response (status = 0x%02x)\n",

					drive->name, stat);

	} else {

		/* not present or maybe ATAPI */

		rc = 3;
@@ -502,6 +507,7 @@ static int do_probe (ide_drive_t *drive, u8 cmd) 
static void enable_nest (ide_drive_t *drive)

{

	ide_hwif_t *hwif = HWIF(drive);

	u8 stat;



	printk("%s: enabling %s -- ", hwif->name, drive->id->model);

	SELECT_DRIVE(drive);
@@ -515,11 +521,12 @@ static void enable_nest (ide_drive_t *drive) 


	msleep(50);



	if (!OK_STAT((hwif->INB(IDE_STATUS_REG)), 0, BAD_STAT)) {

		printk("failed (status = 0x%02x)\n", hwif->INB(IDE_STATUS_REG));

	} else {

		printk("success\n");

	}

	stat = hwif->INB(IDE_STATUS_REG);



	if (!OK_STAT(stat, 0, BAD_STAT))

		printk(KERN_CONT "failed (status = 0x%02x)\n", stat);

	else

		printk(KERN_CONT "success\n");



	/* if !(success||timed-out) */

	if (do_probe(drive, WIN_IDENTIFY) >= 2) {