omap_gem_dma_sync() 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_dma_sync().
Signed-off-by: Tomi Valkeinen tomi.valkeinen@ti.com --- drivers/gpu/drm/omapdrm/omap_gem.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/omapdrm/omap_gem.c b/drivers/gpu/drm/omapdrm/omap_gem.c index cb541d6b3c2b..21989d3518f2 100644 --- a/drivers/gpu/drm/omapdrm/omap_gem.c +++ b/drivers/gpu/drm/omapdrm/omap_gem.c @@ -776,9 +776,20 @@ void omap_gem_dma_sync(struct drm_gem_object *obj,
for (i = 0; i < npages; i++) { if (!omap_obj->addrs[i]) { - omap_obj->addrs[i] = dma_map_page(dev->dev, pages[i], 0, + dma_addr_t addr; + + addr = dma_map_page(dev->dev, pages[i], 0, PAGE_SIZE, DMA_BIDIRECTIONAL); + + if (dma_mapping_error(dev->dev, addr)) { + dev_warn(dev->dev, + "%s: failed to map page\n", + __func__); + break; + } + dirty = true; + omap_obj->addrs[i] = addr; } }