linux-kernel - [PATCH] fpga: socfpga-a10: disable clk on error in socfpga_a10_fpga

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Date:   Fri,  1 Dec 2017 23:26:24 +0300
From:   Alexey Khoroshilov <khoroshilov@...ras.ru>
To:     Alan Tull <atull@...nel.org>, Moritz Fischer <mdf@...nel.org>
Cc:     Alexey Khoroshilov <khoroshilov@...ras.ru>,
        linux-fpga@...r.kernel.org, linux-kernel@...r.kernel.org,
        ldv-project@...uxtesting.org
Subject: [PATCH] fpga: socfpga-a10: disable clk on error in socfpga_a10_fpga_probe()

If fpga_mgr_register() fails, a clock is left undisabled.

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Alexey Khoroshilov <khoroshilov@...ras.ru>
---
 drivers/fpga/socfpga-a10.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/fpga/socfpga-a10.c b/drivers/fpga/socfpga-a10.c
index f8770af0f6b5..a46e343a5b72 100644
--- a/drivers/fpga/socfpga-a10.c
+++ b/drivers/fpga/socfpga-a10.c
@@ -519,8 +519,14 @@ static int socfpga_a10_fpga_probe(struct platform_device *pdev)
 		return -EBUSY;
 	}
 
-	return fpga_mgr_register(dev, "SoCFPGA Arria10 FPGA Manager",
+	ret = fpga_mgr_register(dev, "SoCFPGA Arria10 FPGA Manager",
 				 &socfpga_a10_fpga_mgr_ops, priv);
+	if (ret) {
+		clk_disable_unprepare(priv->clk);
+		return ret;
+	}
+
+	return 0;
 }
 
 static int socfpga_a10_fpga_remove(struct platform_device *pdev)
-- 
2.7.4