linux-kernel - Re: [PATCH] scsi: qedi: Fix potential deadlock on &qedi_percpu->p_work

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Date:   Mon,  7 Aug 2023 22:43:22 -0400
From:   "Martin K. Petersen" <martin.petersen@...cle.com>
To:     njavali@...vell.com, mrangankar@...vell.com,
        GR-QLogic-Storage-Upstream@...vell.com, jejb@...ux.ibm.com,
        Chengfeng Ye <dg573847474@...il.com>
Cc:     "Martin K . Petersen" <martin.petersen@...cle.com>,
        linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] scsi: qedi: Fix potential deadlock on &qedi_percpu->p_work_lock

On Wed, 26 Jul 2023 12:56:55 +0000, Chengfeng Ye wrote:

> As &qedi_percpu->p_work_lock is acquired by hard irq qedi_msix_handler(),
> other acquisition of the same lock under process context should disable
> irq, otherwise deadlock could happen if the irq preempt the execution
> while the lock is held in process context on the same CPU.
> 
> qedi_cpu_offline() is one such function acquires the lock on process
> context.
> 
> [...]

Applied to 6.5/scsi-fixes, thanks!

[1/1] scsi: qedi: Fix potential deadlock on &qedi_percpu->p_work_lock
      https://git.kernel.org/mkp/scsi/c/dd64f8058719

-- 
Martin K. Petersen	Oracle Linux Engineering