linux-kernel - [PATCH AUTOSEL 5.7 373/388] drm/ast: fix missing break in switch statement for format->cpp[0] case 4

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Message-Id: <20200618010805.600873-373-sashal@kernel.org>
Date:   Wed, 17 Jun 2020 21:07:50 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Colin Ian King <colin.king@...onical.com>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Sasha Levin <sashal@...nel.org>,
        dri-devel@...ts.freedesktop.org
Subject: [PATCH AUTOSEL 5.7 373/388] drm/ast: fix missing break in switch statement for format->cpp[0] case 4

From: Colin Ian King <colin.king@...onical.com>

[ Upstream commit 291ddeb621e4a9f1ced8302a777fbd7fbda058c6 ]

Currently the switch statement for format->cpp[0] value 4 assigns
color_index which is never read again and then falls through to the
default case and returns. This looks like a missing break statement
bug. Fix this by adding a break statement.

Addresses-Coverity: ("Unused value")
Fixes: 259d14a76a27 ("drm/ast: Split ast_set_vbios_mode_info()")
Signed-off-by: Colin Ian King <colin.king@...onical.com>
Signed-off-by: Thomas Zimmermann <tzimmermann@...e.de>
Tested-by: Thomas Zimmermann <tzimmermann@...e.de>
Reviewed-by: Thomas Zimmermann <tzimmermann@...e.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20200610115804.1132338-1-colin.king@canonical.com
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/gpu/drm/ast/ast_mode.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/ast/ast_mode.c b/drivers/gpu/drm/ast/ast_mode.c
index cdd6c46d6557..479fc60b6c93 100644
--- a/drivers/gpu/drm/ast/ast_mode.c
+++ b/drivers/gpu/drm/ast/ast_mode.c
@@ -226,6 +226,7 @@ static void ast_set_vbios_color_reg(struct ast_private *ast,
 	case 3:
 	case 4:
 		color_index = TrueCModeIndex;
+		break;
 	default:
 		return;
 	}
-- 
2.25.1