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authorLizhi Hou <lizhi.hou@amd.com>2026-02-11 12:46:44 -0800
committerLizhi Hou <lizhi.hou@amd.com>2026-02-23 09:24:17 -0800
commit1aa82181a3c285c7351523d587f7981ae4c015c8 (patch)
tree0f6e3d78dc171e87be8927cd4bafa12d456cb4f3 /tools/perf/lib/Documentation/tutorial/git@git.tavy.me:linux.git
parent57aa3917a3b3bd805a3679371f97a1ceda3c5510 (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
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