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gpu: nvgpu: sync with sw quiesce thread on init

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Sometimes nvgpu_sw_quiesce_thread does not get a
chance to run before common.init unit tests complete.
When it finally gets scheduled, related gk20a
context is invalid and it crashes in the pthread
wrapper.

Make sure nvgpu_sw_quiesce_thread has started in
nvgpu_sw_quiesce_init_support, to avoid such issues.

Bug 2732985

Change-Id: I0a46f271a926b5f0c203b465f69556b2b46d96c5
Signed-off-by: Thomas Fleury <tfleury@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/2222560
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Thomas Fleury
2019-10-21 09:48:07 -04:00
committed by Alex Waterman
parent 764822d378
commit d22fc21a5c
1 changed files with 5 additions and 1 deletions
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6
drivers/gpu/nvgpu/common/init/nvgpu_init.c
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@@ -79,6 +79,9 @@ static int nvgpu_sw_quiesce_thread(void *data)
struct gk20a *g = data;
int err = 0;
g->sw_quiesce_init_done = true;
nvgpu_cond_signal(&g->sw_quiesce_cond);
/* wait until all SW quiesce is requested */
NVGPU_COND_WAIT(&g->sw_quiesce_cond,
g->sw_quiesce_pending ||
@@ -136,7 +139,8 @@ static int nvgpu_sw_quiesce_init_support(struct gk20a *g)
return err;
}
g->sw_quiesce_init_done = true;
/* wait until thread actually starts */
NVGPU_COND_WAIT(&g->sw_quiesce_cond, g->sw_quiesce_init_done, 0U);
#endif
return 0;