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@ispras.ru>
Reviewed-by: Moritz Fischer <mdf@kernel.org>
Signed-off-by: Alan Tull <atull@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 7 insertions, 1 deletions

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)