clk: sunxi: fix devm_ioremap_resource error detection code

devm_ioremap_resource returns an ERR_PTR value, not NULL, on failure.

A simplified version of the semantic match that finds this problem is as
follows:

// <smpl>
@@
expression e,e1;
statement S;
@@

*e = devm_ioremap_resource(...);
if (!e1) S

// </smpl>

Signed-off-by: Himangi Saraogi <himangi774@gmail.com>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Acked-by Boris BREZILLON <boris.brezillon@free-electrons.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>

diff --git a/drivers/clk/sunxi/clk-sun6i-apb0-gates.c b/drivers/clk/sunxi/clk-sun6i-apb0-gates.c
index 44cd27c..670f90d 100644 (file)
--- a/drivers/clk/sunxi/clk-sun6i-apb0-gates.c
+++ b/drivers/clk/sunxi/clk-sun6i-apb0-gates.c
@@ -29,7 +29,7 @@ static int sun6i_a31_apb0_gates_clk_probe(struct platform_device *pdev)
 
        r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
        reg = devm_ioremap_resource(&pdev->dev, r);
-       if (!reg)
+       if (IS_ERR(reg))
                return PTR_ERR(reg);
 
        clk_parent = of_clk_get_parent_name(np, 0);