gpu: nvgpu: Add checks for tracing enabled

Add checks for all ctxsw trace functions declared in header. This
makes sure chips without tracing support continue to work.

Change-Id: Ic658a00821b589a7b770c1fde52afede02dc1c9c
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: http://git-master/r/1151918
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Thomas Fleury <tfleury@nvidia.com>
GVS: Gerrit_Virtual_Submit

1 files changed, 14 insertions, 1 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/ctxsw_trace_gk20a.c b/drivers/gpu/nvgpu/gk20a/ctxsw_trace_gk20a.c
index 028763a2..6744699f 100644
--- a/drivers/gpu/nvgpu/gk20a/ctxsw_trace_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/ctxsw_trace_gk20a.c
@@ -557,6 +557,9 @@ int gk20a_ctxsw_trace_write(struct gk20a *g,
         const char *reason;
         u32 write_idx;
 
+        if (!g->ctxsw_trace)
+                return 0;
+
         if (unlikely(entry->vmid >= GK20A_CTXSW_TRACE_NUM_DEVS))
                 return -ENODEV;
 
@@ -643,8 +646,12 @@ done:
 
 void gk20a_ctxsw_trace_wake_up(struct gk20a *g, int vmid)
 {
-        struct gk20a_ctxsw_dev *dev = &g->ctxsw_trace->devs[vmid];
+        struct gk20a_ctxsw_dev *dev;
+
+        if (!g->ctxsw_trace)
+                return;
 
+        dev = &g->ctxsw_trace->devs[vmid];
         wake_up_interruptible(&dev->readout_wq);
 }
 
@@ -659,6 +666,9 @@ void gk20a_ctxsw_trace_channel_reset(struct gk20a *g, struct channel_gk20a *ch)
                 .pid = ch->pid,
         };
 
+        if (!g->ctxsw_trace)
+                return;
+
         gk20a_ctxsw_trace_write(g, &entry);
         gk20a_ctxsw_trace_wake_up(g, 0);
 #endif
@@ -677,6 +687,9 @@ void gk20a_ctxsw_trace_tsg_reset(struct gk20a *g, struct tsg_gk20a *tsg)
         };
         struct channel_gk20a *ch;
 
+        if (!g->ctxsw_trace)
+                return;
+
         mutex_lock(&tsg->ch_list_lock);
         ch = list_entry(&tsg->ch_list, struct channel_gk20a, ch_entry);
         mutex_unlock(&tsg->ch_list_lock);