Prevent deadlocks when unlocking a CoreSuspender #5198
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CoreSuspender. `dec_tool_count` was being called on already unlocked CoreSuspenders, causing the tool count to go negative. As the core only resumes when the tool count is 0, a deadlock occured. By returning early if the underlying lock isn't held, this issue is avoided.
ab9rf
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Jan 13, 2025
ab9rf
approved these changes
Jan 13, 2025
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dec_tool_countwas being called on already unlocked CoreSuspenders, causing the tool count to go negative. As the core only resumes when the tool count is 0, a deadlock occured. By returning early if the underlying lock isn't held, this issue is avoided.