The SCSI disk message "Starting disk" to signal resuming of a suspended
disk is printed in both sd_resume() and sd_resume_common() which results
in this message being printed twice when resuming from e.g. autosuspend:
$ echo 5000 > /sys/block/sda/device/power/autosuspend_delay_ms
$ echo auto > /sys/block/sda/device/power/control
[ 4962.438293] sd 0:0:0:0: [sda] Synchronizing SCSI cache
[ 4962.501121] sd 0:0:0:0: [sda] Stopping disk
$ echo on > /sys/block/sda/device/power/control
[ 4972.805851] sd 0:0:0:0: [sda] Starting disk
[ 4980.558806] sd 0:0:0:0: [sda] Starting disk
Fix this double print by removing the call to sd_printk() from sd_resume()
and moving the call to sd_printk() in sd_resume_common() earlier in the
function, before the check using sd_do_start_stop(). Doing so, the message
is printed once regardless if sd_resume_common() actually executes
sd_start_stop_device() (i.e. SCSI device case) or not (libsas and libata
managed ATA devices case).
Fixes: 0c76106cb975 ("scsi: sd: Fix TCG OPAL unlock on system resume")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Damien Le Moal <dlemoal@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20240701215326.128067-1-dlemoal@xxxxxxxxxx
Reviewed-by: Bart Van Assche <bvanassche@xxxxxxx>
Reviewed-by: John Garry <john.g.garry@xxxxxxxxxx>
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index fe82baa924f8..6203915945a4 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -4117,8 +4117,6 @@ static int sd_resume(struct device *dev)
{
struct scsi_disk *sdkp = dev_get_drvdata(dev);
- sd_printk(KERN_NOTICE, sdkp, "Starting disk\n");
-
if (opal_unlock_from_suspend(sdkp->opal_dev)) {
sd_printk(KERN_NOTICE, sdkp, "OPAL unlock failed\n");
return -EIO;
@@ -4135,12 +4133,13 @@ static int sd_resume_common(struct device *dev, bool runtime)
if (!sdkp) /* E.g.: runtime resume at the start of sd_probe() */
return 0;
+ sd_printk(KERN_NOTICE, sdkp, "Starting disk\n");
+
if (!sd_do_start_stop(sdkp->device, runtime)) {
sdkp->suspended = false;
return 0;
}
- sd_printk(KERN_NOTICE, sdkp, "Starting disk\n");
ret = sd_start_stop_device(sdkp, 1);
if (!ret) {
sd_resume(dev);
