From 930dc19c0b7278c26c85f05f92cb417f2bd28aa3 Mon Sep 17 00:00:00 2001 From: Laurent Pinchart Date: Fri, 21 Apr 2017 00:33:57 +0300 Subject: [PATCH] drm: omapdrm: DMA-unmap pages for all buffer types when freeing buffers Both coherent (uncached) and non-coherent (cached) buffers can have their pages mapped to the device through the DMA mapping API. Make sure to unmap any mapped page when freeing a buffer, regardless of its type. Signed-off-by: Laurent Pinchart Signed-off-by: Tomi Valkeinen --- drivers/gpu/drm/omapdrm/omap_gem.c | 17 ++++++----------- 1 file changed, 6 insertions(+), 11 deletions(-) diff --git a/drivers/gpu/drm/omapdrm/omap_gem.c b/drivers/gpu/drm/omapdrm/omap_gem.c index eb02a139..94aef52 100644 --- a/drivers/gpu/drm/omapdrm/omap_gem.c +++ b/drivers/gpu/drm/omapdrm/omap_gem.c @@ -316,18 +316,13 @@ static int get_pages(struct drm_gem_object *obj, struct page ***pages) static void omap_gem_detach_pages(struct drm_gem_object *obj) { struct omap_gem_object *omap_obj = to_omap_bo(obj); + unsigned int npages = obj->size >> PAGE_SHIFT; + unsigned int i; - /* for non-cached buffers, ensure the new pages are clean because - * DSS, GPU, etc. are not cache coherent: - */ - if (omap_obj->flags & (OMAP_BO_WC|OMAP_BO_UNCACHED)) { - int i, npages = obj->size >> PAGE_SHIFT; - for (i = 0; i < npages; i++) { - if (omap_obj->dma_addrs[i]) - dma_unmap_page(obj->dev->dev, - omap_obj->dma_addrs[i], - PAGE_SIZE, DMA_BIDIRECTIONAL); - } + for (i = 0; i < npages; i++) { + if (omap_obj->dma_addrs[i]) + dma_unmap_page(obj->dev->dev, omap_obj->dma_addrs[i], + PAGE_SIZE, DMA_BIDIRECTIONAL); } kfree(omap_obj->dma_addrs); -- 2.7.4