diff options
| author | Adrian Hunter <adrian.hunter@intel.com> | 2022-02-28 14:36:51 +0300 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2022-03-02 07:56:29 +0300 |
| commit | af4edb1d50c6d1044cb34bc43621411b7ba2cffe (patch) | |
| tree | 2bc7de94b61acb4a084d8878b1ebd16ef69f8d4f /drivers/scsi/scsi_error.c | |
| parent | e81ce97f571607757f29a8a25ae0051e72b3c832 (diff) | |
| download | linux-af4edb1d50c6d1044cb34bc43621411b7ba2cffe.tar.xz | |
scsi: core: sd: Add silence_suspend flag to suppress some PM messages
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 add a flag to suppress them. This flag is used by the UFS
driver.
Link: https://lore.kernel.org/r/20220228113652.970857-2-adrian.hunter@intel.com
Cc: stable@vger.kernel.org
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/scsi_error.c')
| -rw-r--r-- | drivers/scsi/scsi_error.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c index 9c237b223e63..fd0827116f53 100644 --- a/drivers/scsi/scsi_error.c +++ b/drivers/scsi/scsi_error.c @@ -484,8 +484,13 @@ static void scsi_report_sense(struct scsi_device *sdev, if (sshdr->asc == 0x29) { evt_type = SDEV_EVT_POWER_ON_RESET_OCCURRED; - sdev_printk(KERN_WARNING, sdev, - "Power-on or device reset occurred\n"); + /* + * Do not print message if it is an expected side-effect + * of runtime PM. + */ + if (!sdev->silence_suspend) + sdev_printk(KERN_WARNING, sdev, + "Power-on or device reset occurred\n"); } if (sshdr->asc == 0x2a && sshdr->ascq == 0x01) { |