Re: [PATCH v2] scsi: ufs: Fix deadlock issue in ufshcd_wait_for_doorbell_clr()

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To: Bean Huo <huobean@xxxxxxxxx>
Subject: Re: [PATCH v2] scsi: ufs: Fix deadlock issue in ufshcd_wait_for_doorbell_clr()
From: "Martin K. Petersen" <martin.petersen@xxxxxxxxxx>
Date: Thu, 16 Dec 2021 22:51:34 -0500
Cc: alim.akhtar@xxxxxxxxxxx, avri.altman@xxxxxxx, asutoshd@xxxxxxxxxxxxxx, jejb@xxxxxxxxxxxxx, martin.petersen@xxxxxxxxxx, stanley.chu@xxxxxxxxxxxx, beanhuo@xxxxxxxxxx, bvanassche@xxxxxxx, tomas.winkler@xxxxxxxxx, cang@xxxxxxxxxxxxxx, linux-scsi@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, YongQin Liu <yongqin.liu@xxxxxxxxxx>, Amit Pundir <amit.pundir@xxxxxxxxxx>, John Stultz <john.stultz@xxxxxxxxxx>
In-reply-to: <20211214120537.531628-1-huobean@gmail.com> (Bean Huo's message of "Tue, 14 Dec 2021 13:05:37 +0100")
Organization: Oracle Corporation

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

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References:
- [PATCH v2] scsi: ufs: Fix deadlock issue in ufshcd_wait_for_doorbell_clr()
  - From: Bean Huo

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