From: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
To: linux-ide@vger.kernel.org
Subject: [PATCH 1/13] serverworks: cleanup ->set_dma_mode method
Date: Tue, 13 Nov 2007 00:01:16 +0100 [thread overview]
Message-ID: <200711130001.16287.bzolnier@gmail.com> (raw)
IDE core guarantees that ->set_dma_mode will be called only
for DMA modes set in SWDMA/MWDMA/UDMA masks.
There should be no functionality changes caused by this patch.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
---
drivers/ide/pci/serverworks.c | 25 ++++++-------------------
1 file changed, 6 insertions(+), 19 deletions(-)
Index: b/drivers/ide/pci/serverworks.c
===================================================================
--- a/drivers/ide/pci/serverworks.c
+++ b/drivers/ide/pci/serverworks.c
@@ -164,25 +164,12 @@ static void svwks_set_dma_mode(ide_drive
ultra_timing &= ~(0x0F << (4*unit));
ultra_enable &= ~(0x01 << drive->dn);
- switch(speed) {
- case XFER_MW_DMA_2:
- case XFER_MW_DMA_1:
- case XFER_MW_DMA_0:
- dma_timing |= dma_modes[speed - XFER_MW_DMA_0];
- break;
-
- case XFER_UDMA_5:
- case XFER_UDMA_4:
- case XFER_UDMA_3:
- case XFER_UDMA_2:
- case XFER_UDMA_1:
- case XFER_UDMA_0:
- dma_timing |= dma_modes[2];
- ultra_timing |= ((udma_modes[speed - XFER_UDMA_0]) << (4*unit));
- ultra_enable |= (0x01 << drive->dn);
- default:
- break;
- }
+ if (speed >= XFER_UDMA_0) {
+ dma_timing |= dma_modes[2];
+ ultra_timing |= (udma_modes[speed - XFER_UDMA_0] << (4 * unit));
+ ultra_enable |= (0x01 << drive->dn);
+ } else if (speed >= XFER_MW_DMA_0)
+ dma_timing |= dma_modes[speed - XFER_MW_DMA_0];
pci_write_config_byte(dev, drive_pci2[drive->dn], dma_timing);
pci_write_config_byte(dev, (0x56|hwif->channel), ultra_timing);
next reply other threads:[~2007-11-12 22:58 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-11-12 23:01 Bartlomiej Zolnierkiewicz [this message]
2007-11-13 11:32 ` [PATCH 1/13] serverworks: cleanup ->set_dma_mode method Sergei Shtylyov
2007-11-13 21:26 ` Bartlomiej Zolnierkiewicz
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