From 88ae4d8c3829fe3d7be9b1e3ed79a37814752d61 Mon Sep 17 00:00:00 2001 From: Bartlomiej Zolnierkiewicz Date: Sat, 13 Oct 2007 17:47:53 +0200 Subject: [PATCH] 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 --- drivers/ide/pci/sc1200.c | 24 ++++++++++++++---------- 1 file changed, 14 insertions(+), 10 deletions(-) diff --git a/drivers/ide/pci/sc1200.c b/drivers/ide/pci/sc1200.c index 76f0868054a1..ee0e3f554d9a 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; -- 2.20.1