From: Bartlomiej Zolnierkiewicz Date: Thu, 19 Jul 2007 23:11:57 +0000 (+0200) Subject: ide: ide_find_best_pio_mode() fixes (take 2) X-Git-Tag: v2.6.23-rc1~248^2~7 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e5fa4b2968ff0f32b5ecfa082fd6db50b731055e;p=linux-2.6 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 Signed-off-by: Bartlomiej Zolnierkiewicz --- diff --git a/drivers/ide/ide-timing.h b/drivers/ide/ide-timing.h index e6cb8593b5..9b5afebafb 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)