gpu: nvgpu: track opened Linux ctrl files

An upcoming patch will need to enumerate opened ctrl nodes; track them
in a list, protected by a mutex.

Bug 200145225
Bug 200541476

Change-Id: I50dc15056832a3bb53fbdd7bd2bffcdaecc7b21c
Signed-off-by: Konsta Holtta <kholtta@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1811840
Reviewed-by: Alex Waterman <alexw@nvidia.com>
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com>
Signed-off-by: Debarshi Dutta <ddutta@nvidia.com>
(cherry picked from commit d53495400e15fdef80be2f04a9f2312b81d2bd6d
in dev-main)
Reviewed-on: https://git-master.nvidia.com/r/2170005
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, 3 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/os/linux/vgpu/vgpu_linux.c b/drivers/gpu/nvgpu/os/linux/vgpu/vgpu_linux.c
index 522f1b86..80bcfffb 100644
--- a/drivers/gpu/nvgpu/os/linux/vgpu/vgpu_linux.c
+++ b/drivers/gpu/nvgpu/os/linux/vgpu/vgpu_linux.c
@@ -73,6 +73,9 @@ static void vgpu_init_vars(struct gk20a *g, struct gk20a_platform *platform)
 
         nvgpu_mutex_init(&priv->vgpu_clk_get_freq_lock);
 
+        nvgpu_mutex_init(&l->ctrl.privs_lock);
+        nvgpu_init_list_node(&l->ctrl.privs);
+
         l->regs_saved = l->regs;
         l->bar1_saved = l->bar1;