From: Yuanjun Gong <ruc_gongyuanjun@163.com>
Date: Thu, 27 Jul 2023 17:03:18 +0000 (+0800)
Subject: fbdev: mmp: fix value check in mmphw_probe()
X-Git-Tag: v4.14.324~40
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2695f7ed81af9f91a592265c972b025eda0e6728;p=thirdparty%2Fkernel%2Fstable.git

fbdev: mmp: fix value check in mmphw_probe()

commit 0872b2c0abc0e84ac82472959c8e14e35277549c upstream.

in mmphw_probe(), check the return value of clk_prepare_enable()
and return the error code if clk_prepare_enable() returns an
unexpected value.

Fixes: d63028c38905 ("video: mmp display controller support")
Signed-off-by: Yuanjun Gong <ruc_gongyuanjun@163.com>
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/video/fbdev/mmp/hw/mmp_ctrl.c b/drivers/video/fbdev/mmp/hw/mmp_ctrl.c
index b6f83d5df9fde..14b1e5a1dcce0 100644
--- a/drivers/video/fbdev/mmp/hw/mmp_ctrl.c
+++ b/drivers/video/fbdev/mmp/hw/mmp_ctrl.c
@@ -525,7 +525,9 @@ static int mmphw_probe(struct platform_device *pdev)
 		ret = -ENOENT;
 		goto failed;
 	}
-	clk_prepare_enable(ctrl->clk);
+	ret = clk_prepare_enable(ctrl->clk);
+	if (ret)
+		goto failed;
 
 	/* init global regs */
 	ctrl_set_default(ctrl);