gpu: nvgpu: do nothing on invalid tsg release

If nvgpu_ioctl_tsg_open() fails, this file has no priv data yet on
release(). In that case there is nothing to free so just return.

Jira NVGPU-967

Change-Id: I02dd1bb12a27745a3b28aaa4a943d79d82b14d2c
Signed-off-by: Konsta Holtta <kholtta@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1847592
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 8 insertions, 1 deletions

diff --git a/drivers/gpu/nvgpu/os/linux/ioctl_tsg.c b/drivers/gpu/nvgpu/os/linux/ioctl_tsg.c
index 8eb5f014..7ebf4291 100644
--- a/drivers/gpu/nvgpu/os/linux/ioctl_tsg.c
+++ b/drivers/gpu/nvgpu/os/linux/ioctl_tsg.c
@@ -467,7 +467,14 @@ void nvgpu_ioctl_tsg_release(struct nvgpu_ref *ref)
 int nvgpu_ioctl_tsg_dev_release(struct inode *inode, struct file *filp)
 {
         struct tsg_private *priv = filp->private_data;
-        struct tsg_gk20a *tsg = priv->tsg;
+        struct tsg_gk20a *tsg;
+
+        if (!priv) {
+                /* open failed, never got a tsg for this file */
+                return 0;
+        }
+
+        tsg = priv->tsg;
 
         nvgpu_ref_put(&tsg->refcount, nvgpu_ioctl_tsg_release);
         nvgpu_kfree(tsg->g, priv);