linux-kernel - Re: [PATCH v2] scsi: ufs: Fix deadlock issue in ufshcd_wait_for_doorbell

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Message-ID: <yq18rwjlwhz.fsf@ca-mkp.ca.oracle.com>
Date:   Thu, 16 Dec 2021 22:51:34 -0500
From:   "Martin K. Petersen" <martin.petersen@...cle.com>
To:     Bean Huo <huobean@...il.com>
Cc:     alim.akhtar@...sung.com, avri.altman@....com,
        asutoshd@...eaurora.org, jejb@...ux.ibm.com,
        martin.petersen@...cle.com, stanley.chu@...iatek.com,
        beanhuo@...ron.com, bvanassche@....org, tomas.winkler@...el.com,
        cang@...eaurora.org, linux-scsi@...r.kernel.org,
        linux-kernel@...r.kernel.org, YongQin Liu <yongqin.liu@...aro.org>,
        Amit Pundir <amit.pundir@...aro.org>,
        John Stultz <john.stultz@...aro.org>
Subject: Re: [PATCH v2] scsi: ufs: Fix deadlock issue in
 ufshcd_wait_for_doorbell_clr()


Bean,

> Call shost_for_each_device() with holding host->host_lock will cause a
> deadlock situation, which will cause the system to stall (the log as
> follow). Fix this issue by using __shost_for_each_device() in
> ufshcd_pending_cmds().

Applied to 5.17/scsi-staging, thanks!

-- 
Martin K. Petersen	Oracle Linux Engineering