1 files changed, 7 insertions, 1 deletions

diff --git a/drivers/ide/pci/cs5530.c b/drivers/ide/pci/cs5530.c
index acaf71fd4c09..e5949b1d3fb0 100644
--- a/drivers/ide/pci/cs5530.c
+++ b/drivers/ide/pci/cs5530.c
@@ -1,5 +1,5 @@
 /*
- * linux/drivers/ide/pci/cs5530.c               Version 0.73    Mar 10 2007
+ * linux/drivers/ide/pci/cs5530.c               Version 0.74    Jul 28 2007
  *
  * Copyright (C) 2000                   Andre Hedrick <andre@linux-ide.org>
  * Copyright (C) 2000                   Mark Lord <mlord@pobox.com>
@@ -207,6 +207,9 @@ static unsigned int __devinit init_chipset_cs5530 (struct pci_dev *dev, const ch
         struct pci_dev *master_0 = NULL, *cs5530_0 = NULL;
         unsigned long flags;
 
+        if (pci_resource_start(dev, 4) == 0)
+                return -EFAULT;
+
         dev = NULL;
         while ((dev = pci_get_device(PCI_VENDOR_ID_CYRIX, PCI_ANY_ID, dev)) != NULL) {
                 switch (dev->device) {
@@ -325,6 +328,9 @@ static void __devinit init_hwif_cs5530 (ide_hwif_t *hwif)
                         /* needs autotuning later */
         }
 
+        if (hwif->dma_base == 0)
+                return;
+
         hwif->atapi_dma = 1;
         hwif->ultra_mask = 0x07;
         hwif->mwdma_mask = 0x07;