blk-mq: Abort suspend when wakeup events are pending #406
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During system suspend, wakeup capable IRQs for block device can be delayed, which can cause blk_mq_hctx_notify_offline() to hang indefinitely while waiting for pending request to complete. Skip the request waiting loop and abort suspend when wakeup events are pending to prevent the deadlock. Fixes: bf0beec ("blk-mq: drain I/O when all CPUs in a hctx are offline") Signed-off-by: Cong Zhang <cong.zhang@oss.qualcomm.com>
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Upstream branch: c2f2b01 |
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Pull request for series with
subject: blk-mq: Abort suspend when wakeup events are pending
version: 2
url: https://patchwork.kernel.org/project/linux-block/list/?series=1029947