fbdev: ep93xx-fb: fix return value check in ep93xxfb_probe

AnnYugawa · hdeller · commit 9d5651ad2ae7 · 2023-07-20T07:52:55.000+02:00
function clk_prepare_enable may fail in ep93xxfb_probe, therefore,
add a return value check to clk_prepare_enable and handle the
error.

Signed-off-by: Yuanjun Gong &lt;ruc_gongyuanjun@163.com&gt;
Signed-off-by: Helge Deller &lt;deller@gmx.de&gt;
diff --git a/drivers/video/fbdev/ep93xx-fb.c b/drivers/video/fbdev/ep93xx-fb.c
@@ -548,7 +548,9 @@ static int ep93xxfb_probe(struct platform_device *pdev)
 	}
 
 	ep93xxfb_set_par(info);
-	clk_prepare_enable(fbi->clk);
+	err = clk_prepare_enable(fbi->clk);
+	if (err)
+		goto failed_check;
 
 	err = register_framebuffer(info);
 	if (err)

Original file line number	Diff line number	Diff line change
`@@ -548,7 +548,9 @@ static int ep93xxfb_probe(struct platform_device *pdev)`
`548`	`548`	`}`
`549`	`549`
`550`	`550`	`ep93xxfb_set_par(info);`
`551`		`- clk_prepare_enable(fbi->clk);`
	`551`	`+ err = clk_prepare_enable(fbi->clk);`
	`552`	`+ if (err)`
	`553`	`+ goto failed_check;`
`552`	`554`
`553`	`555`	`err = register_framebuffer(info);`
`554`	`556`	`if (err)`