From: Asutosh Das <asutoshd@codeaurora.org>
To: cang@codeaurora.org, martin.petersen@oracle.com,
linux-scsi@vger.kernel.org
Cc: Asutosh Das <asutoshd@codeaurora.org>,
linux-arm-msm@vger.kernel.org, stern@rowland.harvard.edu
Subject: [RFC PATCH v1 0/2] Fix deadlock in ufs
Date: Tue, 26 Jan 2021 20:00:21 -0800 [thread overview]
Message-ID: <cover.1611719814.git.asutoshd@codeaurora.org> (raw)
This patchset attempts to fix a deadlock in ufs.
This deadlock occurs because the ufs host driver tries to resume
its child (wlun scsi device) to send SSU to it during its suspend.
Asutosh Das (2):
block: bsg: resume scsi device before accessing
scsi: ufs: Fix deadlock while suspending ufs host
block/bsg.c | 8 ++++++++
drivers/scsi/ufs/ufshcd.c | 18 ++----------------
2 files changed, 10 insertions(+), 16 deletions(-)
--
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project.
WARNING: multiple messages have this Message-ID (diff)
From: Asutosh Das <asutoshd@codeaurora.org>
To: cang@codeaurora.org, martin.petersen@oracle.com,
linux-scsi@vger.kernel.org
Cc: Asutosh Das <asutoshd@codeaurora.org>,
linux-arm-msm@vger.kernel.org, stern@rowland.harvard.edu
Subject: [RFC PATCH v2 0/2] Fix deadlock in ufs
Date: Wed, 27 Jan 2021 19:26:36 -0800 [thread overview]
Message-ID: <cover.1611719814.git.asutoshd@codeaurora.org> (raw)
Message-ID: <20210128032636.ZwjIW61hSaED6NEPbzIWcBCb1YEeEtdJzq6vpw0bqQI@z> (raw)
v1 -> v2
Use pm_runtime_get/put APIs.
Assuming that all bsg devices are scsi devices may break.
This patchset attempts to fix a deadlock in ufs.
This deadlock occurs because the ufs host driver tries to resume
its child (wlun scsi device) to send SSU to it during its suspend.
Asutosh Das (2):
block: bsg: resume scsi device before accessing
scsi: ufs: Fix deadlock while suspending ufs host
block/bsg.c | 8 ++++++++
drivers/scsi/ufs/ufshcd.c | 18 ++----------------
2 files changed, 10 insertions(+), 16 deletions(-)
--
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project.
next reply other threads:[~2021-01-27 4:49 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-27 4:00 Asutosh Das [this message]
2021-01-27 4:00 ` [RFC PATCH v1 1/2] block: bsg: resume scsi device before accessing Asutosh Das
2021-01-27 7:09 ` Avri Altman
2021-01-27 7:59 ` Can Guo
2021-01-27 8:53 ` Can Guo
2021-02-07 2:23 ` Bart Van Assche
2021-01-27 4:00 ` [RFC PATCH v1 2/2] scsi: ufs: Fix deadlock while suspending ufs host Asutosh Das
2021-01-27 15:22 ` [RFC PATCH v1 0/2] Fix deadlock in ufs Bjorn Andersson
2021-01-27 16:16 ` Asutosh Das
2021-01-27 19:36 ` Bjorn Andersson
2021-01-28 2:47 ` Can Guo
2021-01-28 3:26 ` [RFC PATCH v2 " Asutosh Das
2021-01-28 3:26 ` [RFC PATCH v2 1/2] block: bsg: resume platform device before accessing Asutosh Das
2021-01-28 3:26 ` [RFC PATCH v2 2/2] scsi: ufs: Fix deadlock while suspending ufs host Asutosh Das
2021-01-28 12:21 ` Avri Altman
2021-01-28 16:39 ` Asutosh Das
2021-01-28 9:33 ` [RFC PATCH v2 0/2] Fix deadlock in ufs Avri Altman
2021-01-28 17:19 ` Asutosh Das
2021-02-01 20:11 ` Asutosh Das (asd)
2021-02-01 20:27 ` Bart Van Assche
2021-02-01 21:48 ` Alan Stern
2021-02-02 20:52 ` Asutosh Das
2021-02-02 22:05 ` Alan Stern
2021-02-04 0:13 ` Asutosh Das
2021-02-04 19:48 ` Alan Stern
2021-02-04 21:14 ` Asutosh Das
2021-02-05 7:56 ` Avri Altman
2021-02-05 16:11 ` Asutosh Das
2021-02-06 2:37 ` Asutosh Das
2021-02-06 19:24 ` Avri Altman
2021-02-08 16:24 ` Asutosh Das
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