From b9d9e61abb85ecf4e4aa55328b21eac17840a3fb Mon Sep 17 00:00:00 2001
From: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
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 <bzolnier@gmail.com>
---
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;