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gpu: nvgpu: fix invalid TSG pointer

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In gr_gp10b_set_cilp_preempt_pending() we already extract TSG pointer
by calling tsg_gk20a_from_ch() which safely returns correct TSG or
NULL in error case

But before calling g->ops.fifo.post_event_id() we again extract TSG
by directly accessing g->fifo.tsg array, and this could result in
getting invalid TSG pointer

Fix this by removing direct TSG extraction through g->fifo.tsg

Bug 2444819
Jira NVGPU-1601

Change-Id: I9d49b5309c74e162828e7cb7d97556aae939a07c
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1984954
(cherry picked from commit dcd3778b5e)
Reviewed-on: https://git-master.nvidia.com/r/2077313
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Deepak Nibade
2018-12-31 20:07:11 +05:30
committed by mobile promotions
parent 8282b72a04
commit f1be222687
1 changed files with 0 additions and 2 deletions
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2
drivers/gpu/nvgpu/gp10b/gr_gp10b.c
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@@ -1801,8 +1801,6 @@ int gr_gp10b_set_cilp_preempt_pending(struct gk20a *g,
gr_ctx->cilp_preempt_pending = true;
g->gr.cilp_preempt_pending_chid = fault_ch->chid;
tsg = &g->fifo.tsg[fault_ch->tsgid];
g->ops.fifo.post_event_id(tsg,
NVGPU_EVENT_ID_CILP_PREEMPTION_STARTED);