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authorBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2007-10-13 17:47:53 +0200
committerBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2007-10-13 17:47:53 +0200
commit88ae4d8c3829fe3d7be9b1e3ed79a37814752d61 (patch)
treec9fa9df54ea0e62d719a269c16e9e5023801e60f
parentdfb2311226539e0496c0a7c65ceebaaff2120a0b (diff)
downloadlinux-88ae4d8c3829fe3d7be9b1e3ed79a37814752d61.tar.gz
sc1200: fix ->dma_base equal zero handling
Set hwif->atapi_dma/{ultra,mwdma}_mask and drive->autodma after checking that ->dma_base exists. If ->dma_base is not set (== PCI BAR4 cannot be reserved) then DMA hooks shouldn't be initialized or bad things will happen. OTOH hwif->set_{pio,dma}_mode hooks should be set even if hwif->dma_base == 0. Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
-rw-r--r--drivers/ide/pci/sc1200.c24
1 files changed, 14 insertions, 10 deletions
diff --git a/drivers/ide/pci/sc1200.c b/drivers/ide/pci/sc1200.c
index 76f0868054a..ee0e3f554d9 100644
--- a/drivers/ide/pci/sc1200.c
+++ b/drivers/ide/pci/sc1200.c
@@ -378,16 +378,20 @@ static void __devinit init_hwif_sc1200 (ide_hwif_t *hwif)
if (hwif->mate)
hwif->serialized = hwif->mate->serialized = 1;
hwif->autodma = 0;
- if (hwif->dma_base) {
- hwif->udma_filter = sc1200_udma_filter;
- hwif->ide_dma_check = &sc1200_config_dma;
- hwif->ide_dma_end = &sc1200_ide_dma_end;
- if (!noautodma)
- hwif->autodma = 1;
-
- hwif->set_pio_mode = &sc1200_set_pio_mode;
- hwif->set_dma_mode = &sc1200_set_dma_mode;
- }
+
+ hwif->set_pio_mode = &sc1200_set_pio_mode;
+ hwif->set_dma_mode = &sc1200_set_dma_mode;
+
+ if (hwif->dma_base == 0)
+ return;
+
+ hwif->udma_filter = sc1200_udma_filter;
+ hwif->ide_dma_check = &sc1200_config_dma;
+ hwif->ide_dma_end = &sc1200_ide_dma_end;
+
+ if (!noautodma)
+ hwif->autodma = 1;
+
hwif->atapi_dma = 1;
hwif->ultra_mask = 0x07;
hwif->mwdma_mask = 0x07;