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>
diff --git a/drivers/ide/ppc/pmac.c b/drivers/ide/ppc/pmac.c
index b43457e..cfbe569 100644
--- a/drivers/ide/ppc/pmac.c
+++ b/drivers/ide/ppc/pmac.c
@@ -916,14 +916,15 @@
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 @@
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 @@
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;