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drm/radeon: Fix pci_map_page() error checking

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0 is a valid DMA address from pci_map_page(), use pci_dma_mapping_error()
instead to check for errors

[airlied: fix warning + two other places with errors.]

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Benjamin Herrenschmidt 2010-08-10 14:48:58 +10:00 committed by Dave Airlie
parent 1a72d65d62
commit a30f6fb7ce
3 changed files with 4 additions and 3 deletions
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2
drivers/gpu/drm/ati_pcigart.c
View file

@ -152,7 +152,7 @@ int drm_ati_pcigart_init(struct drm_device *dev, struct drm_ati_pcigart_info *ga
/* we need to support large memory configurations */
entry->busaddr[i] = pci_map_page(dev->pdev, entry->pagelist[i],
0, PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
if (entry->busaddr[i] == 0) {
if (pci_dma_mapping_error(dev->pdev, entry->busaddr[i])) {
DRM_ERROR("unable to map PCIGART pages!\n");
drm_ati_pcigart_cleanup(dev, gart_info);
address = NULL;

2
drivers/gpu/drm/radeon/r600_cp.c
View file

@ -200,7 +200,7 @@ int r600_page_table_init(struct drm_device *dev)
entry->pagelist[i], 0,
PAGE_SIZE,
PCI_DMA_BIDIRECTIONAL);
if (entry->busaddr[i] == 0) {
if (pci_dma_mapping_error(dev->pdev, entry->busaddr[i])) {
DRM_ERROR("unable to map PCIGART pages!\n");
r600_page_table_cleanup(dev, gart_info);
goto done;

3
drivers/gpu/drm/radeon/radeon_device.c
View file

@ -347,7 +347,8 @@ int radeon_dummy_page_init(struct radeon_device *rdev)
return -ENOMEM;
rdev->dummy_page.addr = pci_map_page(rdev->pdev, rdev->dummy_page.page,
0, PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
if (!rdev->dummy_page.addr) {
if (pci_dma_mapping_error(rdev->pdev, rdev->dummy_page.addr)) {
dev_err(&rdev->pdev->dev, "Failed to DMA MAP the dummy page\n");
__free_page(rdev->dummy_page.page);
rdev->dummy_page.page = NULL;
return -ENOMEM;