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| author | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2007-07-20 01:11:57 +0200 |
|---|---|---|
| committer | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2007-07-20 01:11:57 +0200 |
| commit | e5fa4b2968ff0f32b5ecfa082fd6db50b731055e (patch) | |
| tree | 096ecacb0c3b93c79f5a39899490acacbb2e11d7 /drivers/ide/ide-timing.h | |
| parent | 7dd00083b1160b560fa2a0a486799b57baa5d035 (diff) | |
| download | lwn-e5fa4b2968ff0f32b5ecfa082fd6db50b731055e.tar.gz lwn-e5fa4b2968ff0f32b5ecfa082fd6db50b731055e.zip | |
ide: ide_find_best_pio_mode() fixes (take 2)
* Check IORDY bit for PIO modes > 2.
* Some devices claim maximum PIO mode > 2 in id->tPIO, they were punished too
severly for this by being limited to PIO_SLOW. Limit them to PIO2 instead.
v2:
* Fix PIO number being returned incorrectly instead of PIO mode
(Noticed by Sergei).
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Diffstat (limited to 'drivers/ide/ide-timing.h')
| -rw-r--r-- | drivers/ide/ide-timing.h | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/drivers/ide/ide-timing.h b/drivers/ide/ide-timing.h index e6cb8593b5ba..9b5afebafbf4 100644 --- a/drivers/ide/ide-timing.h +++ b/drivers/ide/ide-timing.h @@ -111,16 +111,14 @@ static short ide_find_best_pio_mode(ide_drive_t *drive) struct hd_driveid *id = drive->id; short best = 0; - if (id->field_valid & 2) { /* EIDE PIO modes */ - + /* EIDE PIO modes */ + if ((id->field_valid & 2) && (id->capability & 8)) { if ((best = (drive->id->eide_pio_modes & 4) ? XFER_PIO_5 : (drive->id->eide_pio_modes & 2) ? XFER_PIO_4 : (drive->id->eide_pio_modes & 1) ? XFER_PIO_3 : 0)) return best; } - - return (drive->id->tPIO == 2) ? XFER_PIO_2 : - (drive->id->tPIO == 1) ? XFER_PIO_1 : - (drive->id->tPIO == 0) ? XFER_PIO_0 : XFER_PIO_SLOW; + + return XFER_PIO_0 + min_t(u8, id->tPIO, 2); } static void ide_timing_quantize(struct ide_timing *t, struct ide_timing *q, int T, int UT) |