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Date: Mon, 15 Feb 2016 19:41:47 +0100 From: Rasmus Villemoes <linux@...musvillemoes.dk> To: Alex Deucher <alexander.deucher@....com>, Christian König <christian.koenig@....com>, David Airlie <airlied@...ux.ie> Cc: Rasmus Villemoes <linux@...musvillemoes.dk>, dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org Subject: [PATCH 3/3] drm/radeon: use post-decrement in error handling 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. Signed-off-by: Rasmus Villemoes <linux@...musvillemoes.dk> --- drivers/gpu/drm/radeon/radeon_ttm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/radeon/radeon_ttm.c b/drivers/gpu/drm/radeon/radeon_ttm.c index e34307459e50..e06ac546a90f 100644 --- a/drivers/gpu/drm/radeon/radeon_ttm.c +++ b/drivers/gpu/drm/radeon/radeon_ttm.c @@ -758,7 +758,7 @@ 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; -- 2.1.4
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