[PATCH AUTOSEL for 4.9 06/56] drm/sun4i: Fix a return value in case of error

[alexander . levin]

From: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>

[ Upstream commit 0f0861e31e3c59ca4bc1ec59d99260cfca79740e ]

If 'sun4i_backend_drm_format_to_layer()' does not return 0, then 'val' is
left unmodified.
As it is not initialized either, the return value can be anything.

It is likely that returning the error code was expected here.

As the only caller of 'sun4i_backend_update_layer_formats()' does not check
the return value, this fix is purely theorical.

Signed-off-by: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>
Signed-off-by: Maxime Ripard <maxime.ripard@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx>
---
 drivers/gpu/drm/sun4i/sun4i_backend.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/sun4i/sun4i_backend.c b/drivers/gpu/drm/sun4i/sun4i_backend.c
index 6e6c59a661b6..223944a3ba18 100644
--- a/drivers/gpu/drm/sun4i/sun4i_backend.c
+++ b/drivers/gpu/drm/sun4i/sun4i_backend.c
@@ -172,7 +172,7 @@ int sun4i_backend_update_layer_formats(struct sun4i_backend *backend,
 	ret = sun4i_backend_drm_format_to_layer(plane, fb->pixel_format, &val);
 	if (ret) {
 		DRM_DEBUG_DRIVER("Invalid format\n");
-		return val;
+		return ret;
 	}
 
 	regmap_update_bits(backend->regs, SUN4I_BACKEND_ATTCTL_REG1(layer),
-- 
2.11.0