@@ -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->no_rst_sense_msg)
+ sdev_printk(KERN_WARNING, sdev,
+ "Power-on or device reset occurred\n");
}
if (sshdr->asc == 0x2a && sshdr->ascq == 0x01) {
@@ -3742,7 +3742,7 @@ static void sd_shutdown(struct device *dev)
}
}
-static int sd_suspend_common(struct device *dev, bool ignore_stop_errors)
+static int sd_suspend_common(struct device *dev, bool ignore_stop_errors, bool quiet)
{
struct scsi_disk *sdkp = dev_get_drvdata(dev);
struct scsi_sense_hdr sshdr;
@@ -3752,7 +3752,8 @@ static int sd_suspend_common(struct device *dev, bool ignore_stop_errors)
return 0;
if (sdkp->WCE && sdkp->media_present) {
- sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n");
+ if (!quiet)
+ sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n");
ret = sd_sync_cache(sdkp, &sshdr);
if (ret) {
@@ -3774,7 +3775,8 @@ static int sd_suspend_common(struct device *dev, bool ignore_stop_errors)
}
if (sdkp->device->manage_start_stop) {
- sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n");
+ if (!quiet)
+ sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n");
/* an error is not worth aborting a system sleep */
ret = sd_start_stop_device(sdkp, 0);
if (ignore_stop_errors)
@@ -3789,12 +3791,17 @@ static int sd_suspend_system(struct device *dev)
if (pm_runtime_suspended(dev))
return 0;
- return sd_suspend_common(dev, true);
+ return sd_suspend_common(dev, true, false);
}
static int sd_suspend_runtime(struct device *dev)
{
- return sd_suspend_common(dev, false);
+ /*
+ * Do not print messages during runtime PM to avoid never-ending cycles
+ * of messages written back to storage by user space causing runtime
+ * resume, causing more messages and so on.
+ */
+ return sd_suspend_common(dev, false, true);
}
static int sd_resume(struct device *dev)
@@ -585,13 +585,30 @@ static void ufshcd_print_pwr_info(struct ufs_hba *hba)
"INVALID MODE",
};
- dev_err(hba->dev, "%s:[RX, TX]: gear=[%d, %d], lane[%d, %d], pwr[%s, %s], rate = %d\n",
- __func__,
- hba->pwr_info.gear_rx, hba->pwr_info.gear_tx,
- hba->pwr_info.lane_rx, hba->pwr_info.lane_tx,
- names[hba->pwr_info.pwr_rx],
- names[hba->pwr_info.pwr_tx],
- hba->pwr_info.hs_rate);
+ /*
+ * Do not print messages during runtime PM to avoid never-ending cycles
+ * of messages written back to storage by user space causing runtime
+ * resume, causing more messages and so on.
+ */
+ if (hba->pm_op_in_progress) {
+ dev_dbg(hba->dev,
+ "%s:[RX, TX]: gear=[%d, %d], lane[%d, %d], pwr[%s, %s], rate = %d\n",
+ __func__,
+ hba->pwr_info.gear_rx, hba->pwr_info.gear_tx,
+ hba->pwr_info.lane_rx, hba->pwr_info.lane_tx,
+ names[hba->pwr_info.pwr_rx],
+ names[hba->pwr_info.pwr_tx],
+ hba->pwr_info.hs_rate);
+ } else {
+ dev_err(hba->dev,
+ "%s:[RX, TX]: gear=[%d, %d], lane[%d, %d], pwr[%s, %s], rate = %d\n",
+ __func__,
+ hba->pwr_info.gear_rx, hba->pwr_info.gear_tx,
+ hba->pwr_info.lane_rx, hba->pwr_info.lane_tx,
+ names[hba->pwr_info.pwr_rx],
+ names[hba->pwr_info.pwr_tx],
+ hba->pwr_info.hs_rate);
+ }
}
static void ufshcd_device_reset(struct ufs_hba *hba)
@@ -5024,6 +5041,12 @@ static int ufshcd_slave_configure(struct scsi_device *sdev)
pm_runtime_get_noresume(&sdev->sdev_gendev);
else if (ufshcd_is_rpm_autosuspend_allowed(hba))
sdev->rpm_autosuspend = 1;
+ /*
+ * Do not print messages during runtime PM to avoid never-ending cycles
+ * of messages written back to storage by user space causing runtime
+ * resume, causing more messages and so on.
+ */
+ sdev->no_rst_sense_msg = 1;
ufshcd_crypto_register(hba, q);
@@ -7339,8 +7362,14 @@ static u32 ufshcd_find_max_sup_active_icc_level(struct ufs_hba *hba,
if (!hba->vreg_info.vcc || !hba->vreg_info.vccq ||
!hba->vreg_info.vccq2) {
- dev_err(hba->dev,
- "%s: Regulator capability was not set, actvIccLevel=%d",
+ /*
+ * Do not print messages during runtime PM to avoid never-ending
+ * cycles of messages written back to storage by user space
+ * causing runtime resume, causing more messages and so on.
+ */
+ if (!hba->pm_op_in_progress)
+ dev_err(hba->dev,
+ "%s: Regulator capability was not set, actvIccLevel=%d",
__func__, icc_level);
goto out;
}
@@ -206,6 +206,7 @@ struct scsi_device {
unsigned rpm_autosuspend:1; /* Enable runtime autosuspend at device
* creation time */
unsigned ignore_media_change:1; /* Ignore MEDIA CHANGE on resume */
+ unsigned no_rst_sense_msg:1; /* Do not print reset sense message */
unsigned int queue_stopped; /* request queue is quiesced */
bool offline_already; /* Device offline message logged */
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 suppress them. Example messages from Ubuntu 21.10: $ dmesg | tail [ 1620.380071] ufshcd 0000:00:12.5: ufshcd_print_pwr_info:[RX, TX]: gear=[1, 1], lane[1, 1], pwr[SLOWAUTO_MODE, SLOWAUTO_MODE], rate = 0 [ 1620.408825] ufshcd 0000:00:12.5: ufshcd_print_pwr_info:[RX, TX]: gear=[4, 4], lane[2, 2], pwr[FAST MODE, FAST MODE], rate = 2 [ 1620.409020] ufshcd 0000:00:12.5: ufshcd_find_max_sup_active_icc_level: Regulator capability was not set, actvIccLevel=0 [ 1620.409524] sd 0:0:0:0: Power-on or device reset occurred [ 1622.938794] sd 0:0:0:0: [sda] Synchronizing SCSI cache [ 1622.939184] ufs_device_wlun 0:0:0:49488: Power-on or device reset occurred [ 1625.183175] ufshcd 0000:00:12.5: ufshcd_print_pwr_info:[RX, TX]: gear=[1, 1], lane[1, 1], pwr[SLOWAUTO_MODE, SLOWAUTO_MODE], rate = 0 [ 1625.208041] ufshcd 0000:00:12.5: ufshcd_print_pwr_info:[RX, TX]: gear=[4, 4], lane[2, 2], pwr[FAST MODE, FAST MODE], rate = 2 [ 1625.208311] ufshcd 0000:00:12.5: ufshcd_find_max_sup_active_icc_level: Regulator capability was not set, actvIccLevel=0 [ 1625.209035] sd 0:0:0:0: Power-on or device reset occurred Cc: stable@vger.kernel.org Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> --- drivers/scsi/scsi_error.c | 9 ++++++-- drivers/scsi/sd.c | 17 ++++++++++---- drivers/scsi/ufs/ufshcd.c | 47 ++++++++++++++++++++++++++++++-------- include/scsi/scsi_device.h | 1 + 4 files changed, 58 insertions(+), 16 deletions(-)