gpu: nvgpu: remove code for ch not bound to tsg

- Remove handling for channels that are no more bound to tsg
  as channel could be referenceable but no more part of a tsg
- Use tsg_gk20a_from_ch to get pointer to tsg for a given channel
- Clear unhandled gr interrupts

Bug 2429295
JIRA NVGPU-1580

Change-Id: I9da43a2bc9a0282c793b9f301eaf8e8604f91d70
Signed-off-by: Seema Khowala <seemaj@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1972492
(cherry picked from commit 013ca60edd97e7719e389b3048fed9b165277251
in dev-kernel)
Reviewed-on: https://git-master.nvidia.com/r/2018262
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: Debarshi Dutta <ddutta@nvidia.com>
Tested-by: Debarshi Dutta <ddutta@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Bibek Basu <bbasu@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 7 insertions, 6 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/fecs_trace_gk20a.c b/drivers/gpu/nvgpu/gk20a/fecs_trace_gk20a.c
index cac3ce27..6b384c89 100644
--- a/drivers/gpu/nvgpu/gk20a/fecs_trace_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/fecs_trace_gk20a.c
@@ -457,9 +457,14 @@ int gk20a_fecs_trace_bind_channel(struct gk20a *g,
         struct gk20a_fecs_trace *trace = g->fecs_trace;
         struct nvgpu_mem *mem;
         u32 context_ptr = gk20a_fecs_trace_fecs_context_ptr(g, ch);
-        pid_t pid;
         u32 aperture_mask;
 
+        tsg = tsg_gk20a_from_ch(ch);
+        if (tsg == NULL) {
+                nvgpu_err(g, "chid: %d is not bound to tsg", ch->chid);
+                return -EINVAL;
+        }
+
         nvgpu_log(g, gpu_dbg_fn|gpu_dbg_ctxsw,
                         "chid=%d context_ptr=%x inst_block=%llx",
                         ch->chid, context_ptr,
@@ -519,11 +524,7 @@ int gk20a_fecs_trace_bind_channel(struct gk20a *g,
         /* pid (process identifier) in user space, corresponds to tgid (thread
          * group id) in kernel space.
          */
-        if (gk20a_is_channel_marked_as_tsg(ch))
-                pid = tsg_gk20a_from_ch(ch)->tgid;
-        else
-                pid = ch->tgid;
-        gk20a_fecs_trace_hash_add(g, context_ptr, pid);
+        gk20a_fecs_trace_hash_add(g, context_ptr, tsg->tgid);
 
         return 0;
 }