From: Jon Mayo <jmayo@nvidia.com>
Date: Fri, 7 Jan 2011 03:05:38 +0000 (-0800)
Subject: [ARM] tegra: edid modes uninitialized on i2c fail
X-Git-Tag: firefly_0821_release~9833^2~30^2~5
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=10f846716e83f5c2f86f3fef6f4d37c0b74dc79c;p=firefly-linux-kernel-4.4.55.git

[ARM] tegra: edid modes uninitialized on i2c fail

fix unhandled i2c errors in tegra_edid_get_monspecs() that resulted in
truncated mode lists(stale data).

Change-Id: Iec7878f2a3071c5297d0569d4f1cce1c9ed48979
Reviewed-by: Jon Mayo <jmayo@nvidia.com>
Tested-by: Jon Mayo <jmayo@nvidia.com>
Reviewed-by: Peter Zu <pzu@nvidia.com>
Reviewed-by: Yu-Huan Hsu <yhsu@nvidia.com>
Signed-off-by: Jon Mayo <jmayo@nvidia.com>
---

diff --git a/drivers/video/tegra/dc/edid.c b/drivers/video/tegra/dc/edid.c
index 812a0087a96d..47f05e6ac31c 100644
--- a/drivers/video/tegra/dc/edid.c
+++ b/drivers/video/tegra/dc/edid.c
@@ -170,6 +170,8 @@ int tegra_edid_get_monspecs(struct tegra_edid *edid, struct fb_monspecs *specs)
 	int extension_blocks;
 
 	ret = tegra_edid_read_block(edid, 0, edid->data);
+	if (ret)
+		return ret;
 
 	memset(specs, 0x0, sizeof(struct fb_monspecs));
 	fb_edid_to_monspecs(edid->data, specs);