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| author | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2007-10-13 17:47:48 +0200 |
|---|---|---|
| committer | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2007-10-13 17:47:48 +0200 |
| commit | 085798b12ffebd69c13c8ce05fabc8ed5ac43e63 (patch) | |
| tree | da615a9f8ca863354e47b31453a4e9380af7d525 /drivers/ide/ppc | |
| parent | ide-pmac: don't check kauai_lookup_timing() return value (diff) | |
| download | linux-085798b12ffebd69c13c8ce05fabc8ed5ac43e63.tar.xz linux-085798b12ffebd69c13c8ce05fabc8ed5ac43e63.zip | |
ide-pmac: pmac_ide_tune_chipset() fixes
* Don't check check for pmif == NULL (it should never be NULL if we got here).
* Make a local copy of the timings and set the pmif->timings[] only after
setting the transfer mode on the device (otherwise SELECT_DRIVE() call in
pmac_ide_do_setfeature() will program new timings before the transfer mode
is set on the device - this was pointed out by Sergei). This change makes
pmac_ide_tune_chipset() behavior match this of pmac_ide_{m,u}dma_enable().
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Diffstat (limited to 'drivers/ide/ppc')
| -rw-r--r-- | drivers/ide/ppc/pmac.c | 27 |
1 files changed, 16 insertions, 11 deletions
diff --git a/drivers/ide/ppc/pmac.c b/drivers/ide/ppc/pmac.c index b43457e34311..cfbe5690ca88 100644 --- a/drivers/ide/ppc/pmac.c +++ b/drivers/ide/ppc/pmac.c @@ -916,14 +916,15 @@ static int pmac_ide_tune_chipset(ide_drive_t *drive, const u8 speed) int unit = (drive->select.b.unit & 0x01); int ret = 0; pmac_ide_hwif_t* pmif = (pmac_ide_hwif_t *)HWIF(drive)->hwif_data; - u32 *timings, *timings2; + u32 *timings, *timings2, tl[2]; - if (pmif == NULL) - return 1; - timings = &pmif->timings[unit]; timings2 = &pmif->timings[unit+2]; - + + /* Copy timings to local image */ + tl[0] = *timings; + tl[1] = *timings2; + switch(speed) { #ifdef CONFIG_BLK_DEV_IDEDMA_PMAC case XFER_UDMA_6: @@ -934,19 +935,19 @@ static int pmac_ide_tune_chipset(ide_drive_t *drive, const u8 speed) case XFER_UDMA_1: case XFER_UDMA_0: if (pmif->kind == controller_kl_ata4) - ret = set_timings_udma_ata4(timings, speed); + ret = set_timings_udma_ata4(&tl[0], speed); else if (pmif->kind == controller_un_ata6 || pmif->kind == controller_k2_ata6) - ret = set_timings_udma_ata6(timings, timings2, speed); + ret = set_timings_udma_ata6(&tl[0], &tl[1], speed); else if (pmif->kind == controller_sh_ata6) - ret = set_timings_udma_shasta(timings, timings2, speed); + ret = set_timings_udma_shasta(&tl[0], &tl[1], speed); else - ret = 1; + ret = 1; break; case XFER_MW_DMA_2: case XFER_MW_DMA_1: case XFER_MW_DMA_0: - ret = set_timings_mdma(drive, pmif->kind, timings, timings2, speed, 0); + ret = set_timings_mdma(drive, pmif->kind, &tl[0], &tl[1], speed, 0); break; case XFER_SW_DMA_2: case XFER_SW_DMA_1: @@ -962,7 +963,11 @@ static int pmac_ide_tune_chipset(ide_drive_t *drive, const u8 speed) ret = pmac_ide_do_setfeature(drive, speed); if (ret) return ret; - + + /* Apply timings to controller */ + *timings = tl[0]; + *timings2 = tl[1]; + pmac_ide_do_update_timings(drive); return 0; |