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drm/msm: Synchronize set_sysprof on ctxlock

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A user that was perfmon_capable() could try to race setting SYSPROF
param on multiple threads to trigger a reference leak.

Signed-off-by: Rob Clark <robin.clark@oss.qualcomm.com>
Patchwork: https://patchwork.freedesktop.org/patch/743091/
Message-ID: <20260729155609.20190-5-robin.clark@oss.qualcomm.com>
This commit is contained in:
Rob Clark
2026-07-29 08:55:41 -07:00
parent 2c26f9e46d
commit 2b1bfcb59d
1 changed files with 2 additions and 0 deletions
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2
drivers/gpu/drm/msm/msm_submitqueue.c
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@@ -9,6 +9,8 @@
int msm_context_set_sysprof(struct msm_context *ctx, struct msm_gpu *gpu, int sysprof)
{
guard(rwsem_write)(&ctx->ctxlock);
/*
* Since pm_runtime and sysprof_active are both refcounts, we
* call apply the new value first, and then unwind the previous