Hi Tomi,
Thank you for the patch.
On Friday 26 February 2016 11:35:58 Tomi Valkeinen wrote:
> 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>
Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
> ---
> 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;
> }
> }
--
Regards,
Laurent Pinchart
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