Re: [PATCH v3 1/1] scsi: ufs: core: Fix &hwq->cq_lock deadlock issue

Martin K. Petersen
2023-04-25T03:20:02Z

Alice,

> When ufshcd_err_handler() is executed, CQ event interrupt can enter
> waiting for the same lock. It could happened in upstream code path
> ufshcd_handle_mcq_cq_events() and also in ufs_mtk_mcq_intr(). This
> warning message will be generated when &hwq->cq_lock is used in IRQ
> context with IRQ enabled. Use ufshcd_mcq_poll_cqe_lock() with
> spin_lock_irqsave instead of spin_lock to resolve the deadlock issue.

Applied to 6.4/scsi-staging, thanks!

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Martin K. Petersen Oracle Linux Engineering