From b9d9e61abb85ecf4e4aa55328b21eac17840a3fb Mon Sep 17 00:00:00 2001 From: Bartlomiej Zolnierkiewicz Date: Sat, 13 Oct 2007 17:47:52 +0200 Subject: [PATCH] sgiioc4: add missing ->dma_base check 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/sgiioc4.c | 16 ++++++++++------ 1 file changed, 10 insertions(+), 6 deletions(-) diff --git a/drivers/ide/pci/sgiioc4.c b/drivers/ide/pci/sgiioc4.c index 26352626c0e8..85ffaaa39b1b 100644 --- a/drivers/ide/pci/sgiioc4.c +++ b/drivers/ide/pci/sgiioc4.c @@ -587,8 +587,6 @@ static void __devinit ide_init_sgiioc4(ide_hwif_t * hwif) { hwif->mmio = 1; - hwif->atapi_dma = 1; - hwif->mwdma_mask = 0x04; hwif->pio_mask = 0x00; hwif->set_pio_mode = NULL; /* Sets timing for PIO mode */ hwif->set_dma_mode = &sgiioc4_set_dma_mode; @@ -602,6 +600,14 @@ ide_init_sgiioc4(ide_hwif_t * hwif) hwif->quirkproc = NULL; hwif->busproc = NULL; + hwif->INB = &sgiioc4_INB; + + if (hwif->dma_base == 0) + return; + + hwif->atapi_dma = 1; + hwif->mwdma_mask = 0x04; + hwif->dma_setup = &sgiioc4_ide_dma_setup; hwif->dma_start = &sgiioc4_ide_dma_start; hwif->ide_dma_end = &sgiioc4_ide_dma_end; @@ -613,8 +619,6 @@ ide_init_sgiioc4(ide_hwif_t * hwif) hwif->dma_host_off = &sgiioc4_dma_host_off; hwif->dma_lost_irq = &sgiioc4_dma_lost_irq; hwif->dma_timeout = &ide_dma_timeout; - - hwif->INB = &sgiioc4_INB; } static int __devinit @@ -684,8 +688,6 @@ sgiioc4_ide_setup_pci_device(struct pci_dev *dev) /* Initializing chipset IRQ Registers */ writel(0x03, (void __iomem *)(irqport + IOC4_INTR_SET * 4)); - ide_init_sgiioc4(hwif); - hwif->autodma = 0; if (dma_base && ide_dma_sgiioc4(hwif, dma_base) == 0) { @@ -695,6 +697,8 @@ sgiioc4_ide_setup_pci_device(struct pci_dev *dev) printk(KERN_INFO "%s: %s Bus-Master DMA disabled\n", hwif->name, DRV_NAME); + ide_init_sgiioc4(hwif); + if (probe_hwif_init(hwif)) return -EIO; -- 2.30.2