ata: update ata port's runtime status during system resume

The ata port is brought back to full power state during system resume.
So its runtime PM status will have to be updated to reflect
the actual post-system sleep status.

This also fixes below warning during system suspend/resume.

WARNING: at /work/linux/drivers/ata/libata-eh.c:4034
ata_scsi_port_error_handler+0x89/0x557()

4034         WARN_ON(!(ap->pflags & ATA_PFLAG_SUSPENDED));

Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

1 files changed, 16 insertions, 2 deletions

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index d5935e4f3529..ba1ed9b3acc3 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -5298,7 +5298,7 @@ static int ata_port_suspend(struct device *dev)
         return ata_port_suspend_common(dev);
 }
 
-static int ata_port_resume(struct device *dev)
+static int ata_port_resume_common(struct device *dev)
 {
         struct ata_port *ap = to_ata_port(dev);
         int rc;
@@ -5308,6 +5308,20 @@ static int ata_port_resume(struct device *dev)
         return rc;
 }
 
+static int ata_port_resume(struct device *dev)
+{
+        int rc;
+
+        rc = ata_port_resume_common(dev);
+        if (!rc) {
+                pm_runtime_disable(dev);
+                pm_runtime_set_active(dev);
+                pm_runtime_enable(dev);
+        }
+
+        return rc;
+}
+
 static int ata_port_runtime_idle(struct device *dev)
 {
         return pm_runtime_suspend(dev);
@@ -5318,7 +5332,7 @@ static const struct dev_pm_ops ata_port_pm_ops = {
         .resume = ata_port_resume,
 
         .runtime_suspend = ata_port_suspend_common,
-        .runtime_resume = ata_port_resume,
+        .runtime_resume = ata_port_resume_common,
         .runtime_idle = ata_port_runtime_idle,
 };