gpu: nvgpu: fix Coverity issues

- operands not affecting result (id = 12845)
- logically dead code (id = 12890)
- dereference after null check (id = 12968)
- unsigned compared to 0 (id = 13176)
- resource leak (id = 13338, 18673)
- unused pointer value (id = 13916)

Bug 1703084

Change-Id: I2f401dd93126af27748c53fa1b3a59cb154af36b
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: http://git-master/r/835143
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-by: Seshendra Gadagottu <sgadagottu@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Sachin Nikam <snikam@nvidia.com>

1 files changed, 1 insertions, 3 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/gk20a.c b/drivers/gpu/nvgpu/gk20a/gk20a.c
index 7ac600c0..79218c97 100644
--- a/drivers/gpu/nvgpu/gk20a/gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/gk20a.c
@@ -1102,7 +1102,7 @@ static int gk20a_pm_enable_clk(struct device *dev)
         for (index = 0; index < platform->num_clks; index++) {
                 int err = 0;
                 if (platform->clk[index])
-                        clk_prepare_enable(platform->clk[index]);
+                        err = clk_prepare_enable(platform->clk[index]);
                 if (err)
                         return -EINVAL;
         }
@@ -1623,14 +1623,12 @@ static int gk20a_domain_init(struct of_device_id *matches)
 {
         int ret = 0;
         struct device_node *np;
-        const struct of_device_id *match;
         struct gk20a_domain_data *gk20a_domain;
 
         np = of_find_matching_node(NULL, matches);
         if (!np)
                 return -ENOENT;
 
-        match = of_match_node(matches, np);
         gk20a_domain = (struct gk20a_domain_data *)kzalloc
                        (sizeof(struct gk20a_domain_data), GFP_KERNEL);
         if (!gk20a_domain)