scsi: sd: Do not repeat the starting disk message

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@vger.kernel.org
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Link: https://lore.kernel.org/r/20240701215326.128067-1-dlemoal@kernel.org
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: John Garry <john.g.garry@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index fe82baa..6203915 100644 (file)
--- 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);