From dfb2311226539e0496c0a7c65ceebaaff2120a0b Mon Sep 17 00:00:00 2001 From: Bartlomiej Zolnierkiewicz Date: Sat, 13 Oct 2007 17:47:52 +0200 Subject: [PATCH] cs5520: fix ->dma_base equal zero handling Set hwif->ide_dma_{check,on} and hwif->autodma to 1 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. Signed-off-by: Bartlomiej Zolnierkiewicz --- drivers/ide/pci/cs5520.c | 19 +++++++++---------- 1 file changed, 9 insertions(+), 10 deletions(-) diff --git a/drivers/ide/pci/cs5520.c b/drivers/ide/pci/cs5520.c index cb2a10203dc4..fbce90048aec 100644 --- a/drivers/ide/pci/cs5520.c +++ b/drivers/ide/pci/cs5520.c @@ -142,25 +142,24 @@ static void __devinit init_hwif_cs5520(ide_hwif_t *hwif) { hwif->set_pio_mode = &cs5520_set_pio_mode; hwif->set_dma_mode = &cs5520_set_dma_mode; - hwif->ide_dma_check = &cs5520_config_drive_xfer_rate; - hwif->ide_dma_on = &cs5520_dma_on; - if(!noautodma) - hwif->autodma = 1; - - if(!hwif->dma_base) - { - hwif->drives[0].autotune = 1; - hwif->drives[1].autotune = 1; + if (hwif->dma_base == 0) { + hwif->drives[1].autotune = hwif->drives[0].autotune = 1; return; } + hwif->ide_dma_check = &cs5520_config_drive_xfer_rate; + hwif->ide_dma_on = &cs5520_dma_on; + /* ATAPI is harder so leave it for now */ hwif->atapi_dma = 0; hwif->ultra_mask = 0; hwif->swdma_mask = 0; hwif->mwdma_mask = 0; - + + if (!noautodma) + hwif->autodma = 1; + hwif->drives[0].autodma = hwif->autodma; hwif->drives[1].autodma = hwif->autodma; } -- 2.20.1