clk: tegra: fix __clk_lookup() return value checks

In case of error, the function __clk_lookup() returns NULL pointer
not ERR_PTR(). The IS_ERR() test in the return value check should
be replaced with NULL test.

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>

diff --git a/drivers/clk/tegra/clk-pll.c b/drivers/clk/tegra/clk-pll.c
index 8eb2755c71b3028c7a49b11637f8dd85eedf5739..2dd432266ef620d7b56aff825d7b7bbe24351cbd 100644 (file)
--- a/drivers/clk/tegra/clk-pll.c
+++ b/drivers/clk/tegra/clk-pll.c
@@ -1490,7 +1490,7 @@ struct clk *tegra_clk_register_pllxc(const char *name, const char *parent_name,
        u32 val, val_iddq;
 
        parent = __clk_lookup(parent_name);
-       if (IS_ERR(parent)) {
+       if (!parent) {
                WARN(1, "parent clk %s of %s must be registered first\n",
                        name, parent_name);
                return ERR_PTR(-EINVAL);
@@ -1591,7 +1591,7 @@ struct clk *tegra_clk_register_pllm(const char *name, const char *parent_name,
                return ERR_PTR(-EINVAL);
 
        parent = __clk_lookup(parent_name);
-       if (IS_ERR(parent)) {
+       if (!parent) {
                WARN(1, "parent clk %s of %s must be registered first\n",
                        name, parent_name);
                return ERR_PTR(-EINVAL);
@@ -1632,7 +1632,7 @@ struct clk *tegra_clk_register_pllc(const char *name, const char *parent_name,
                return ERR_PTR(-EINVAL);
 
        parent = __clk_lookup(parent_name);
-       if (IS_ERR(parent)) {
+       if (!parent) {
                WARN(1, "parent clk %s of %s must be registered first\n",
                        name, parent_name);
                return ERR_PTR(-EINVAL);
@@ -1756,7 +1756,7 @@ struct clk *tegra_clk_register_pllss(const char *name, const char *parent_name,
                return ERR_PTR(-EINVAL);
 
        parent = __clk_lookup(parent_name);
-       if (IS_ERR(parent)) {
+       if (!parent) {
                WARN(1, "parent clk %s of %s must be registered first\n",
                        name, parent_name);
                return ERR_PTR(-EINVAL);