diff options
| author | Tomi Valkeinen <tomi.valkeinen@ti.com> | 2016-01-05 12:43:14 +0300 |
|---|---|---|
| committer | Tomi Valkeinen <tomi.valkeinen@ti.com> | 2016-03-03 18:36:41 +0300 |
| commit | 579ef2541b9d3734979628ba81f8822902d2e508 (patch) | |
| tree | e16b7f2ea09a5972e56567ca9253640b5fb845ed /drivers/gpu/drm/omapdrm/omap_gem.c | |
| parent | 5bcbab176655f9a8fd6179986648cc45864a1604 (diff) | |
| download | linux-579ef2541b9d3734979628ba81f8822902d2e508.tar.xz | |
drm/omap: use dma_mapping_error in omap_gem_attach_pages
omap_gem_attach_pages() calls dma_map_page() but does not check the
possible error with dma_mapping_error(). If DMA-API debugging is
enabled, the debug layer will give a warning if dma_mapping_error() has
not been used.
This patch adds proper error handling to omap_gem_attach_pages().
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Diffstat (limited to 'drivers/gpu/drm/omapdrm/omap_gem.c')
| -rw-r--r-- | drivers/gpu/drm/omapdrm/omap_gem.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/gpu/drm/omapdrm/omap_gem.c b/drivers/gpu/drm/omapdrm/omap_gem.c index 8495a1a4b617..cb541d6b3c2b 100644 --- a/drivers/gpu/drm/omapdrm/omap_gem.c +++ b/drivers/gpu/drm/omapdrm/omap_gem.c @@ -264,6 +264,19 @@ static int omap_gem_attach_pages(struct drm_gem_object *obj) for (i = 0; i < npages; i++) { addrs[i] = dma_map_page(dev->dev, pages[i], 0, PAGE_SIZE, DMA_BIDIRECTIONAL); + + if (dma_mapping_error(dev->dev, addrs[i])) { + dev_warn(dev->dev, + "%s: failed to map page\n", __func__); + + for (i = i - 1; i >= 0; --i) { + dma_unmap_page(dev->dev, addrs[i], + PAGE_SIZE, DMA_BIDIRECTIONAL); + } + + ret = -ENOMEM; + goto free_addrs; + } } } else { addrs = kzalloc(npages * sizeof(*addrs), GFP_KERNEL); @@ -278,6 +291,8 @@ static int omap_gem_attach_pages(struct drm_gem_object *obj) return 0; +free_addrs: + kfree(addrs); free_pages: drm_gem_put_pages(obj, pages, true, false); |