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author | skadamati <skadamati@nvidia.com> | 2017-06-30 04:47:25 -0400 |
---|---|---|
committer | mobile promotions <svcmobile_promotions@nvidia.com> | 2017-07-05 12:36:03 -0400 |
commit | e768e74df8be8abe8442d958bde7a4a2886694ba (patch) | |
tree | 9dc9b2adb04e9b2b674cd29267752ed4d3e3807f /drivers/gpu/nvgpu/vgpu/vgpu.c | |
parent | 8b36c45b39d06e273d00cd76180b589727dcde45 (diff) |
gpu: nvgpu: Fix race condition during poweron
When two or more apps ran simultaneously
First app context sets power_on flag & starts init
Other app context check the power_on flag
and try to use GPU without init completed
Which makes aother apps to assert
Added mutex to synchronize poweron access
Bug 200297265
Change-Id: Ie138f7f43bb0dd3304ed91ae3649a6a4947bee91
Signed-off-by: skadamati <skadamati@nvidia.com>
Reviewed-on: https://git-master/r/1511436
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
Diffstat (limited to 'drivers/gpu/nvgpu/vgpu/vgpu.c')
-rw-r--r-- | drivers/gpu/nvgpu/vgpu/vgpu.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/nvgpu/vgpu/vgpu.c b/drivers/gpu/nvgpu/vgpu/vgpu.c index f02acad0..bd52dc0a 100644 --- a/drivers/gpu/nvgpu/vgpu/vgpu.c +++ b/drivers/gpu/nvgpu/vgpu/vgpu.c | |||
@@ -243,6 +243,7 @@ static void vgpu_remove_support(struct gk20a *g) | |||
243 | 243 | ||
244 | static void vgpu_init_vars(struct gk20a *g, struct gk20a_platform *platform) | 244 | static void vgpu_init_vars(struct gk20a *g, struct gk20a_platform *platform) |
245 | { | 245 | { |
246 | nvgpu_mutex_init(&g->poweron_lock); | ||
246 | nvgpu_mutex_init(&g->poweroff_lock); | 247 | nvgpu_mutex_init(&g->poweroff_lock); |
247 | g->regs_saved = g->regs; | 248 | g->regs_saved = g->regs; |
248 | g->bar1_saved = g->bar1; | 249 | g->bar1_saved = g->bar1; |