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| author | Lizhi Hou <lizhi.hou@amd.com> | 2026-02-11 12:46:44 -0800 |
|---|---|---|
| committer | Lizhi Hou <lizhi.hou@amd.com> | 2026-02-23 09:24:17 -0800 |
| commit | 1aa82181a3c285c7351523d587f7981ae4c015c8 (patch) | |
| tree | 0f6e3d78dc171e87be8927cd4bafa12d456cb4f3 /tools/perf/lib/Documentation/tutorial/git@git.tavy.me:linux.git | |
| parent | 57aa3917a3b3bd805a3679371f97a1ceda3c5510 (diff) | |
accel/amdxdna: Fix dead lock for suspend and resume
When an application issues a query IOCTL while auto suspend is running,
a deadlock can occur. The query path holds dev_lock and then calls
pm_runtime_resume_and_get(), which waits for the ongoing suspend to
complete. Meanwhile, the suspend callback attempts to acquire dev_lock
and blocks, resulting in a deadlock.
Fix this by releasing dev_lock before calling pm_runtime_resume_and_get()
and reacquiring it after the call completes. Also acquire dev_lock in the
resume callback to keep the locking consistent.
Fixes: 063db451832b ("accel/amdxdna: Enhance runtime power management")
Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org>
Signed-off-by: Lizhi Hou <lizhi.hou@amd.com>
Link: https://patch.msgid.link/20260211204644.722758-1-lizhi.hou@amd.com
Diffstat (limited to 'tools/perf/lib/Documentation/tutorial/git@git.tavy.me:linux.git')
0 files changed, 0 insertions, 0 deletions
