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gpu: nvgpu: protect clk_arb init with mutex.

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g->clk_arb is currently initialized as a part of gk20a_finalize_poweron().
Any subsequent call to gk20a_finalize_poweron reinitializes the clk_arb
and leading to memory leaks. This is resolved by protecting the
g->clk_arb initialization with a mutex clk_arb_enable_lock in struct
gk20a. We skip initializing the g->clk_arb if its not NULL.

Bug 2061372

Change-Id: I59158e0a5e4c827fdbd6d9ea2d04c78d0986347a
Signed-off-by: Debarshi Dutta <ddutta@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1811650
Reviewed-by: Deepak Nibade <dnibade@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Debarshi Dutta
2018-09-03 10:51:02 +05:30
committed by mobile promotions
parent 16ad9f5379
commit bac38f52cc
5 changed files with 22 additions and 1 deletions
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drivers/gpu/nvgpu/os/linux/driver_common.c
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@@ -65,6 +65,7 @@ static void nvgpu_init_vars(struct gk20a *g)
nvgpu_mutex_init(&g->poweroff_lock);
nvgpu_mutex_init(&g->ctxsw_disable_lock);
nvgpu_mutex_init(&g->tpc_pg_lock);
nvgpu_mutex_init(&g->clk_arb_enable_lock);
l->regs_saved = l->regs;
l->bar1_saved = l->bar1;