On Thu, 2011-12-15 at 00:49 +0800, Alan Stern wrote:

On Wed, 14 Dec 2011, Lin Ming wrote:

quoted

Commit af8db15 disabled device's runtime PM during shutdown.
So sd's runtime status can't be checked with pm_runtime_suspended(dev)
any more.

Fix it by checking runtime status with pm_runtime_status_suspended(dev).

Signed-off-by: Lin Ming <redacted>
---
 drivers/scsi/sd.c |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)

diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index 7b3f807..284b087 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c

@@ -2742,7 +2742,12 @@ static void sd_shutdown(struct device *dev)
 	if (!sdkp)
 		return;         /* this can happen */
 
-	if (pm_runtime_suspended(dev))
+	/*
+	 * Check runtime status with pm_runtime_status_suspended(dev)
+	 * instead of pm_runtime_suspended(dev),
+	 * because device_shutdown() has disabled the device's runtime PM.
+	 */
+	if (pm_runtime_status_suspended(dev))
 		goto exit;
 
 	if (sdkp->WCE) {

This is no longer needed.  See commit
fe6b91f47080eb17d21cbf2a39311877d57f6938 (PM / Driver core: leave
runtime PM enabled during system shutdown).

I'll remove this patch.

Thanks.

Alan Stern