[PATCH V4 0/2] scsi: ufs: Fix runtime PM messages never-ending cycle

From: Adrian Hunter <adrian.hunter@intel.com>
To: "Martin K . Petersen" <martin.petersen@oracle.com>
Cc: "James E . J . Bottomley" <jejb@linux.ibm.com>,
	Bean Huo <huobean@gmail.com>, Avri Altman <avri.altman@wdc.com>,
	Alim Akhtar <alim.akhtar@samsung.com>,
	Can Guo <cang@codeaurora.org>,
	Asutosh Das <asutoshd@codeaurora.org>,
	Bart Van Assche <bvanassche@acm.org>,
	linux-scsi@vger.kernel.org
Subject: [PATCH V4 0/2] scsi: ufs: Fix runtime PM messages never-ending cycle
Date: Mon, 28 Feb 2022 13:36:50 +0200	[thread overview]
Message-ID: <20220228113652.970857-1-adrian.hunter@intel.com> (raw)

Hi

Here is V4 to address comments by Martin.  See patches for version history.

Summary:

Kernel messages produced during runtime PM can cause a never-ending
cycle because user space utilities (e.g. journald or rsyslog) write the
messages back to storage, causing runtime resume, more messages, and so
on.

Messages that tell of things that are expected to happen, are arguably
unnecessary, so make changes to suppress them for the UFS driver.

Adrian Hunter (2):
      scsi: Add quiet_suspend flag for SCSI devices to suppress some PM messages
      scsi: ufs: Fix runtime PM messages never-ending cycle

 drivers/scsi/scsi_error.c  |  9 +++++++--
 drivers/scsi/sd.c          |  6 ++++--
 drivers/scsi/ufs/ufshcd.c  | 21 +++++++++++++++++++--
 include/scsi/scsi_device.h |  6 ++++++
 4 files changed, 36 insertions(+), 6 deletions(-)

Regards
Adrian