From: "Martin K. Petersen" <martin.petersen@oracle.com>
To: linux-scsi@vger.kernel.org, adrian.hunter@intel.com,
Asutosh Das <asutoshd@codeaurora.org>,
cang@codeaurora.org
Cc: "Martin K . Petersen" <martin.petersen@oracle.com>,
Matthias Brugger <matthias.bgg@gmail.com>,
"moderated list:ARM/Mediatek SoC support"
<linux-arm-kernel@lists.infradead.org>,
linux-arm-msm@vger.kernel.org,
"moderated list:ARM/Mediatek SoC support"
<linux-mediatek@lists.infradead.org>
Subject: Re: [PATCH v21 0/2] Enable power management for ufs wlun
Date: Mon, 10 May 2021 23:25:22 -0400 [thread overview]
Message-ID: <162070348784.27567.14973100785851703779.b4-ty@oracle.com> (raw)
In-Reply-To: <cover.1619223249.git.asutoshd@codeaurora.org>
On Fri, 23 Apr 2021 17:20:15 -0700, Asutosh Das wrote:
> This patch attempts to fix a deadlock in ufs while sending SSU.
> Recently, blk_queue_enter() added a check to not process requests if the
> queue is suspended. That leads to a resume of the associated device which
> is suspended. In ufs, that device is ufs device wlun and it's parent is
> ufs_hba. This resume tries to resume ufs device wlun which in turn tries
> to resume ufs_hba, which is already in the process of suspending, thus
> causing a deadlock.
>
> [...]
Applied to 5.14/scsi-queue, thanks!
[1/2] scsi: ufs: Enable power management for wlun
https://git.kernel.org/mkp/scsi/c/b294ff3e3449
[2/2] ufs: sysfs: Resume the proper scsi device
https://git.kernel.org/mkp/scsi/c/aef80fd1da32
--
Martin K. Petersen Oracle Linux Engineering
WARNING: multiple messages have this Message-ID (diff)
From: "Martin K. Petersen" <martin.petersen@oracle.com>
To: linux-scsi@vger.kernel.org, adrian.hunter@intel.com,
Asutosh Das <asutoshd@codeaurora.org>,
cang@codeaurora.org
Cc: "Martin K . Petersen" <martin.petersen@oracle.com>,
Matthias Brugger <matthias.bgg@gmail.com>,
"moderated list:ARM/Mediatek SoC support"
<linux-arm-kernel@lists.infradead.org>,
linux-arm-msm@vger.kernel.org,
"moderated list:ARM/Mediatek SoC support"
<linux-mediatek@lists.infradead.org>
Subject: Re: [PATCH v21 0/2] Enable power management for ufs wlun
Date: Mon, 10 May 2021 23:25:22 -0400 [thread overview]
Message-ID: <162070348784.27567.14973100785851703779.b4-ty@oracle.com> (raw)
In-Reply-To: <cover.1619223249.git.asutoshd@codeaurora.org>
On Fri, 23 Apr 2021 17:20:15 -0700, Asutosh Das wrote:
> This patch attempts to fix a deadlock in ufs while sending SSU.
> Recently, blk_queue_enter() added a check to not process requests if the
> queue is suspended. That leads to a resume of the associated device which
> is suspended. In ufs, that device is ufs device wlun and it's parent is
> ufs_hba. This resume tries to resume ufs device wlun which in turn tries
> to resume ufs_hba, which is already in the process of suspending, thus
> causing a deadlock.
>
> [...]
Applied to 5.14/scsi-queue, thanks!
[1/2] scsi: ufs: Enable power management for wlun
https://git.kernel.org/mkp/scsi/c/b294ff3e3449
[2/2] ufs: sysfs: Resume the proper scsi device
https://git.kernel.org/mkp/scsi/c/aef80fd1da32
--
Martin K. Petersen Oracle Linux Engineering
_______________________________________________
Linux-mediatek mailing list
Linux-mediatek@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-mediatek
WARNING: multiple messages have this Message-ID (diff)
From: "Martin K. Petersen" <martin.petersen@oracle.com>
To: linux-scsi@vger.kernel.org, adrian.hunter@intel.com,
Asutosh Das <asutoshd@codeaurora.org>,
cang@codeaurora.org
Cc: "Martin K . Petersen" <martin.petersen@oracle.com>,
Matthias Brugger <matthias.bgg@gmail.com>,
"moderated list:ARM/Mediatek SoC support"
<linux-arm-kernel@lists.infradead.org>,
linux-arm-msm@vger.kernel.org,
"moderated list:ARM/Mediatek SoC support"
<linux-mediatek@lists.infradead.org>
Subject: Re: [PATCH v21 0/2] Enable power management for ufs wlun
Date: Mon, 10 May 2021 23:25:22 -0400 [thread overview]
Message-ID: <162070348784.27567.14973100785851703779.b4-ty@oracle.com> (raw)
In-Reply-To: <cover.1619223249.git.asutoshd@codeaurora.org>
On Fri, 23 Apr 2021 17:20:15 -0700, Asutosh Das wrote:
> This patch attempts to fix a deadlock in ufs while sending SSU.
> Recently, blk_queue_enter() added a check to not process requests if the
> queue is suspended. That leads to a resume of the associated device which
> is suspended. In ufs, that device is ufs device wlun and it's parent is
> ufs_hba. This resume tries to resume ufs device wlun which in turn tries
> to resume ufs_hba, which is already in the process of suspending, thus
> causing a deadlock.
>
> [...]
Applied to 5.14/scsi-queue, thanks!
[1/2] scsi: ufs: Enable power management for wlun
https://git.kernel.org/mkp/scsi/c/b294ff3e3449
[2/2] ufs: sysfs: Resume the proper scsi device
https://git.kernel.org/mkp/scsi/c/aef80fd1da32
--
Martin K. Petersen Oracle Linux Engineering
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2021-05-11 3:26 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-24 0:20 [PATCH v21 0/2] Enable power management for ufs wlun Asutosh Das
2021-04-24 0:20 ` Asutosh Das
2021-04-24 0:20 ` Asutosh Das
2021-04-24 0:20 ` [PATCH v21 1/2] scsi: ufs: Enable power management for wlun Asutosh Das
2021-04-24 0:20 ` Asutosh Das
2021-04-24 0:20 ` Asutosh Das
2021-04-25 12:20 ` Adrian Hunter
2021-04-25 12:20 ` Adrian Hunter
2021-04-25 12:20 ` Adrian Hunter
2021-04-24 0:20 ` [PATCH v21 2/2] ufs: sysfs: Resume the proper scsi device Asutosh Das
2021-04-29 3:10 ` [PATCH v21 0/2] Enable power management for ufs wlun Martin K. Petersen
2021-04-29 3:10 ` Martin K. Petersen
2021-04-29 3:10 ` Martin K. Petersen
2021-04-29 7:01 ` Avri Altman
2021-04-29 7:01 ` Avri Altman
2021-04-29 7:01 ` Avri Altman
2021-05-11 3:25 ` Martin K. Petersen [this message]
2021-05-11 3:25 ` Martin K. Petersen
2021-05-11 3:25 ` Martin K. Petersen
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