0 is a valid DMA address from pci_map_page(), use pci_dma_mapping_error()
instead to check for errors
Signed-off-by: Benjamin Herrenschmidt <b...@kernel.crashing.org>
---
drivers/gpu/drm/radeon/radeon_device.c | 3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/drivers/gpu/drm/radeon/radeon_device.c
b/drivers/gpu/drm/radeon/radeon_device.c
index 6c95dcf..83024e8 100644
--- a/drivers/gpu/drm/radeon/radeon_device.c
+++ b/drivers/gpu/drm/radeon/radeon_device.c
@@ -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, "Failed to DMA MAP the dummy page\n");
__free_page(rdev->dummy_page.page);
rdev->dummy_page.page = NULL;
return -ENOMEM;
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