Commit 84a0ab72 authored by Rasmus Villemoes's avatar Rasmus Villemoes Committed by Jiri Slaby

drm/radeon: use post-decrement in error handling

commit bc3f5d8c upstream.

We need to use post-decrement to get the pci_map_page undone also for
i==0, and to avoid some very unpleasant behaviour if pci_map_page
failed already at i==0.
Reviewed-by: default avatarChristian König <christian.koenig@amd.com>
Signed-off-by: default avatarRasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: default avatarJiri Slaby <jslaby@suse.cz>
parent 71b8d0d3
......@@ -621,7 +621,7 @@ static int radeon_ttm_tt_populate(struct ttm_tt *ttm)
0, PAGE_SIZE,
PCI_DMA_BIDIRECTIONAL);
if (pci_dma_mapping_error(rdev->pdev, gtt->ttm.dma_address[i])) {
while (--i) {
while (i--) {
pci_unmap_page(rdev->pdev, gtt->ttm.dma_address[i],
PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
gtt->ttm.dma_address[i] = 0;
......
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