From: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
To: linux-ide@vger.kernel.org
Subject: [PATCH 4/11] hpt34x: fix CONFIG_HPT34X_AUTODMA=n handling
Date: Sat, 4 Aug 2007 22:07:41 +0200 [thread overview]
Message-ID: <200708042207.41437.bzolnier@gmail.com> (raw)
Programming DMA mode may destroy current PIO mode setting so if
CONFIG_HPT34X_AUTODMA=n (the default case) make ide_tune_dma() fail
early by disabling all host DMA masks and re-tune PIO mode.
This fix doesn't help with the driver being broken but is needed
for some other changes.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
---
drivers/ide/pci/hpt34x.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
Index: b/drivers/ide/pci/hpt34x.c
===================================================================
--- a/drivers/ide/pci/hpt34x.c
+++ b/drivers/ide/pci/hpt34x.c
@@ -85,11 +85,7 @@ static int hpt34x_config_drive_xfer_rate
drive->init_speed = 0;
if (ide_tune_dma(drive))
-#ifndef CONFIG_HPT34X_AUTODMA
return -1;
-#else
- return 0;
-#endif
if (ide_use_fast_pio(drive))
ide_set_max_pio(drive);
@@ -157,9 +153,11 @@ static void __devinit init_hwif_hpt34x(i
if (!hwif->dma_base)
return;
+#ifdef CONFIG_HPT34X_AUTODMA
hwif->ultra_mask = 0x07;
hwif->mwdma_mask = 0x07;
hwif->swdma_mask = 0x07;
+#endif
hwif->ide_dma_check = &hpt34x_config_drive_xfer_rate;
if (!noautodma)
reply other threads:[~2007-08-04 20:16 UTC|newest]
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