gpu: nvgpu: fix erroneous gk20a_put() call

With a recent rework we moved gk20a_get() call to nvgpu_ioctl_tsg_open(),
but corresponding gk20a_put() call remained in gk20a_tsg_release()

So if a TSG is opened and released from within kernel with APIs
gk20a_tsg_open()/gk20a_tsg_release() we mistakenly drop extra refcount
through gk20a_put()

Fix this by moving gk20a_put() call to nvgpu_ioctl_tsg_release() which
balances gk20a_get() call in nvgpu_ioctl_tsg_open()

Bug 200374011

Change-Id: Id0cec0426e6231309dc530ab5c934dacaba9f8da
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1630969
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 0 insertions, 1 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/tsg_gk20a.c b/drivers/gpu/nvgpu/gk20a/tsg_gk20a.c
index ff700372..d9ddc011 100644
--- a/drivers/gpu/nvgpu/gk20a/tsg_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/tsg_gk20a.c
@@ -347,7 +347,6 @@ void gk20a_tsg_release(struct nvgpu_ref *ref)
         tsg->runlist_id = ~0;
 
         gk20a_dbg(gpu_dbg_fn, "tsg released %d\n", tsg->tsgid);
-        gk20a_put(g);
 }
 
 struct tsg_gk20a *tsg_gk20a_from_ch(struct channel_gk20a *ch)