Commit 6586b372 authored Jun 30, 2014 by Ujwal Patel

msm: mdss: return error -E2BIG when per pipe bandwidth check fails



In current implementation, it is possible that user-space tries to
configure pipe beyond its bandwidth (BW) limits. When driver detects this
condition, in few use-cases it can return -EINVAL which is not the proper
representation of the error and can lead to incorrect behavior from
user-space process. Correct this by always returning -E2BIG error
whenever per pipe BW check fails.

Change-Id: I90f429ad0bafd5bb5ec6da66d75d44ec48c0f299
Signed-off-by: Ujwal Patel <ujwalp@codeaurora.org>

parent dfc6b80d

drivers/video/msm/mdss/mdss_mdp_overlay.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -434,7 +434,7 @@ static int __mdp_pipe_tune_perf(struct mdss_mdp_pipe *pipe,
		!pipe->scale.enable_pxl_ext)
		pipe->vert_deci++;
		else
		return -EPERM;
		return -E2BIG;
		}

		return 0;