[PATCH 18/19] ata: libata-eh: Reduce "disable device" message verbosity

[Damien Le Moal <dlemoal@kernel.org>]

There is no point in warning about a device being diabled when we expect
it to be, that is, on suspend, shutdown or when detaching a device.
Suppress this message for these cases by introducing the EH static
function ata_eh_dev_disable() and by using it in ata_eh_unload() and
ata_eh_detach_dev(). ata_dev_disable() code is modified to call this new
function after printing the "disable device" message.

Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
---
 drivers/ata/libata-eh.c | 32 +++++++++++++++++++-------------
 1 file changed, 19 insertions(+), 13 deletions(-)

diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index bbc522d16f44..5bad5dabffe0 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -494,6 +494,18 @@ void ata_eh_release(struct ata_port *ap)
 	mutex_unlock(&ap->host->eh_mutex);
 }
 
+static void ata_eh_dev_disable(struct ata_device *dev)
+{
+	ata_acpi_on_disable(dev);
+	ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO0 | ATA_DNXFER_QUIET);
+	dev->class++;
+
+	/* From now till the next successful probe, ering is used to
+	 * track probe failures.  Clear accumulated device error info.
+	 */
+	ata_ering_clear(&dev->ering);
+}
+
 static void ata_eh_unload(struct ata_port *ap)
 {
 	struct ata_link *link;
@@ -517,8 +529,8 @@ static void ata_eh_unload(struct ata_port *ap)
 	 */
 	ata_for_each_link(link, ap, PMP_FIRST) {
 		sata_scr_write(link, SCR_CONTROL, link->saved_scontrol & 0xff0);
-		ata_for_each_dev(dev, link, ALL)
-			ata_dev_disable(dev);
+		ata_for_each_dev(dev, link, ENABLED)
+			ata_eh_dev_disable(dev);
 	}
 
 	/* freeze and set UNLOADED */
@@ -1211,14 +1223,8 @@ void ata_dev_disable(struct ata_device *dev)
 		return;
 
 	ata_dev_warn(dev, "disable device\n");
-	ata_acpi_on_disable(dev);
-	ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO0 | ATA_DNXFER_QUIET);
-	dev->class++;
 
-	/* From now till the next successful probe, ering is used to
-	 * track probe failures.  Clear accumulated device error info.
-	 */
-	ata_ering_clear(&dev->ering);
+	ata_eh_dev_disable(dev);
 }
 EXPORT_SYMBOL_GPL(ata_dev_disable);
 
@@ -1240,12 +1246,12 @@ void ata_eh_detach_dev(struct ata_device *dev)
 
 	/*
 	 * If the device is still enabled, transition it to standby power mode
-	 * (i.e. spin down HDDs).
+	 * (i.e. spin down HDDs) and disable it.
 	 */
-	if (ata_dev_enabled(dev))
+	if (ata_dev_enabled(dev)) {
 		ata_dev_power_set_standby(dev);
-
-	ata_dev_disable(dev);
+		ata_eh_dev_disable(dev);
+	}
 
 	spin_lock_irqsave(ap->lock, flags);
 
-- 
2.41.0