net: rswitch: Fix error detection

In rswitch_probe the error detection after the call to devm_clk_get is
very wrong. It checks the value of ret which is uninitialised at that
point. Instead it should be using the macros for including errors into
pointers.

This issue was found by Smatch.

Signed-off-by: Andrew Goodbody <andrew.goodbody@linaro.org>
Reviewed-by: Marek Vasut <marek.vasut+renesas@mailbox.org>

diff --git a/drivers/net/rswitch.c b/drivers/net/rswitch.c
index 62d3f39..f27587a 100644 (file)
--- a/drivers/net/rswitch.c
+++ b/drivers/net/rswitch.c
@@ -1110,8 +1110,10 @@ static int rswitch_probe(struct udevice *dev)
                return -EINVAL;
 
        priv->rsw_clk = devm_clk_get(dev, NULL);
-       if (ret)
+       if (IS_ERR(priv->rsw_clk)) {
+               ret = PTR_ERR(priv->rsw_clk);
                goto err_map;
+       }
 
        ret = clk_prepare_enable(priv->rsw_clk);
        if (ret)