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 061a105afb8655df6dc33bf41ca87e232d5dbb55..27c3ee5df8defe04e1228f41b6b57beac6780aaa 100644 (file)
--- a/drivers/video/fbdev/mmp/hw/mmp_ctrl.c
+++ b/drivers/video/fbdev/mmp/hw/mmp_ctrl.c
@@ -518,7 +518,9 @@ 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);