RE: [RFC PATCH v2 2/2] scsi: ufs: Fix deadlock while suspending ufs host

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To: Asutosh Das <asutoshd@xxxxxxxxxxxxxx>, "cang@xxxxxxxxxxxxxx" <cang@xxxxxxxxxxxxxx>, "martin.petersen@xxxxxxxxxx" <martin.petersen@xxxxxxxxxx>, "linux-scsi@xxxxxxxxxxxxxxx" <linux-scsi@xxxxxxxxxxxxxxx>
Subject: RE: [RFC PATCH v2 2/2] scsi: ufs: Fix deadlock while suspending ufs host
From: Avri Altman <Avri.Altman@xxxxxxx>
Date: Thu, 28 Jan 2021 12:21:32 +0000
Cc: "linux-arm-msm@xxxxxxxxxxxxxxx" <linux-arm-msm@xxxxxxxxxxxxxxx>, "stern@xxxxxxxxxxxxxxxxxxx" <stern@xxxxxxxxxxxxxxxxxxx>, "Bao D . Nguyen" <nguyenb@xxxxxxxxxxxxxx>, Alim Akhtar <alim.akhtar@xxxxxxxxxxx>, "James E.J. Bottomley" <jejb@xxxxxxxxxxxxx>, Stanley Chu <stanley.chu@xxxxxxxxxxxx>, Bean Huo <beanhuo@xxxxxxxxxx>, open list <linux-kernel@xxxxxxxxxxxxxxx>
In-reply-to: <d50e7620c47109ea7664dd9ca4144fc0c7c8502d.1611803264.git.asutoshd@codeaurora.org>
References: <b1db5394aa3f6cf44cd9adb9c8d569caa0c9e4f5.1611803264.git.asutoshd@codeaurora.org> <d50e7620c47109ea7664dd9ca4144fc0c7c8502d.1611803264.git.asutoshd@codeaurora.org>
Wdcipoutbound: EOP-TRUE

> 
> During runtime-suspend of ufs host, the scsi devices are
> already suspended and so are the queues associated with them.
> But the ufs host sends SSU to wlun during its runtime-suspend.
Do you possible meant: "sends request-sense while clearing UAC to...."

Thanks,
Avri

Follow-Ups:
- Re: [RFC PATCH v2 2/2] scsi: ufs: Fix deadlock while suspending ufs host
  - From: Asutosh Das

References:
- [RFC PATCH v2 1/2] block: bsg: resume platform device before accessing
  - From: Asutosh Das
- [RFC PATCH v2 2/2] scsi: ufs: Fix deadlock while suspending ufs host
  - From: Asutosh Das

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