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| author | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2008-02-02 19:56:45 +0100 |
|---|---|---|
| committer | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2008-02-02 19:56:45 +0100 |
| commit | 57b552757314cf3f2253f07629f49016be6fa6c3 (patch) | |
| tree | 61088b5a722d0ee321e97bd785eb91f008bb5bb5 /drivers/ide/ide-probe.c | |
| parent | b187dfeed3be2fc879e904ed0b01d490d8866760 (diff) | |
| download | lwn-57b552757314cf3f2253f07629f49016be6fa6c3.tar.gz lwn-57b552757314cf3f2253f07629f49016be6fa6c3.zip | |
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: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Diffstat (limited to 'drivers/ide/ide-probe.c')
| -rw-r--r-- | drivers/ide/ide-probe.c | 35 |
1 files changed, 21 insertions, 14 deletions
diff --git a/drivers/ide/ide-probe.c b/drivers/ide/ide-probe.c index c8d533a1015e..9c07bdb68d1a 100644 --- a/drivers/ide/ide-probe.c +++ b/drivers/ide/ide-probe.c @@ -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) { |