diff options
Diffstat (limited to 'drivers/gpu/drm/gma500/mid_bios.c')
| -rw-r--r-- | drivers/gpu/drm/gma500/mid_bios.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/gpu/drm/gma500/mid_bios.c b/drivers/gpu/drm/gma500/mid_bios.c index 128e6bb37568..55fee10eefff 100644 --- a/drivers/gpu/drm/gma500/mid_bios.c +++ b/drivers/gpu/drm/gma500/mid_bios.c @@ -45,6 +45,12 @@ static void mid_get_fuse_settings(struct drm_device *dev) #define FB_SKU_100 0 #define FB_SKU_100L 1 #define FB_SKU_83 2 + if (pci_root == NULL) { + WARN_ON(1); + return; + } + + pci_write_config_dword(pci_root, 0xD0, FB_REG06); pci_read_config_dword(pci_root, 0xD4, &fuse_value); @@ -101,6 +107,10 @@ static void mid_get_pci_revID(struct drm_psb_private *dev_priv) uint32_t platform_rev_id = 0; struct pci_dev *pci_gfx_root = pci_get_bus_and_slot(0, PCI_DEVFN(2, 0)); + if (pci_gfx_root == NULL) { + WARN_ON(1); + return; + } pci_read_config_dword(pci_gfx_root, 0x08, &platform_rev_id); dev_priv->platform_rev_id = (uint8_t) platform_rev_id; pci_dev_put(pci_gfx_root); @@ -138,6 +148,10 @@ static void mid_get_vbt_data(struct drm_psb_private *dev_priv) /* get the virtual address of the vbt */ vbt_virtual = ioremap(addr, sizeof(*vbt)); + if (vbt_virtual == NULL) { + vbt->size = 0; + return; + } memcpy(vbt, vbt_virtual, sizeof(*vbt)); iounmap(vbt_virtual); /* Free virtual address space */ |