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@xxxxxx>
---
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;
}
}
--
2.5.0
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