gpu: nvgpu: Clear channel class on open

Channel class needs to be cleared when a channel is opened. Otherwise
previously used channel remains, and we can accidentally use KEPLER_C
methods even if KEPLER_C is not allocated.

Bug 1487928
Bug 200000669

Change-Id: I3e1ae8d5edbdd82fa569b38a89a89dedb69ee773
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: http://git-master/r/428866
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-by: Shridhar Rasal <srasal@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, 0 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/channel_gk20a.c b/drivers/gpu/nvgpu/gk20a/channel_gk20a.c
index ef7195a7..33681c2a 100644
--- a/drivers/gpu/nvgpu/gk20a/channel_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/channel_gk20a.c
@@ -757,6 +757,7 @@ static struct channel_gk20a *gk20a_open_new_channel(struct gk20a *g)
         ch->timeout_ms_max = gk20a_get_gr_idle_timeout(g);
         ch->timeout_debug_dump = true;
         ch->has_timedout = false;
+        ch->obj_class = 0;
 
         /* The channel is *not* runnable at this point. It still needs to have
          * an address space bound and allocate a gpfifo and grctx. */