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[04/44] drm/exynos: don't use DMA_ERROR_CODE

Message ID 20170616181059.19206-5-hch@lst.de
State Not Applicable, archived
Delegated to: David Miller
Headers show

Commit Message

Christoph Hellwig June 16, 2017, 6:10 p.m. UTC 
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>
---
 drivers/gpu/drm/exynos/exynos_drm_fb.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
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Patch

diff --git a/drivers/gpu/drm/exynos/exynos_drm_fb.c b/drivers/gpu/drm/exynos/exynos_drm_fb.c
index c77a5aced81a..d48fd7c918f8 100644
--- 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 drm_framebuffer *fb, int index)
 {
 	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];
 }