From: Christoph Hellwig <hch@lst.de>
Date: Mon, 22 May 2017 10:40:52 +0200
Subject: drm/exynos: don't use DMA_ERROR_CODE
Git-commit: e0c7a510aea75db4927d810fb0a84233641b53c3
Patch-mainline: v4.13-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166
DMA_ERROR_CODE already isn't a valid API to user for drivers and will
go away soon. exynos_drm_fb_dma_addr uses it a an error return when
the passed in index is invalid, but the callers never check for it
but instead pass the address straight to the hardware.
Add a WARN_ON instead and just return 0.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/gpu/drm/exynos/exynos_drm_fb.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/gpu/drm/exynos/exynos_drm_fb.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_fb.c
@@ -181,8 +181,8 @@ dma_addr_t exynos_drm_fb_dma_addr(struct
{
struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb);
- if (index >= MAX_FB_BUFFER)
- return DMA_ERROR_CODE;
+ if (WARN_ON_ONCE(index >= MAX_FB_BUFFER))
+ return 0;
return exynos_fb->dma_addr[index];
}