Patch "memstick: rtsx_usb_ms: Runtime resume the device when polling for cards" has been added to the 4.8-stable tree

Patch "memstick: rtsx_usb_ms: Runtime resume the device when polling for cards" has been added to the 4.8-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    memstick: rtsx_usb_ms: Runtime resume the device when polling for cards

to the 4.8-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     memstick-rtsx_usb_ms-runtime-resume-the-device-when-polling-for-cards.patch
and it can be found in the queue-4.8 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 796aa46adf1d90eab36ae06a42e6d3f10b28a75c Mon Sep 17 00:00:00 2001
From: Alan Stern <stern@rowland.harvard.edu>
Date: Mon, 26 Sep 2016 15:45:41 -0700
Subject: memstick: rtsx_usb_ms: Runtime resume the device when polling for cards

From: Alan Stern <stern@rowland.harvard.edu>

commit 796aa46adf1d90eab36ae06a42e6d3f10b28a75c upstream.

Accesses to the rtsx usb device, which is the parent of the rtsx memstick
device, must not be done unless it's runtime resumed.

Therefore when the rtsx_usb_ms driver polls for inserted memstick cards,
let's add pm_runtime_get|put*() to make sure accesses is done when the
rtsx usb device is runtime resumed.

Reported-by: Ritesh Raj Sarraf <rrs@researchut.com>
Tested-by: Ritesh Raj Sarraf <rrs@researchut.com>
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/memstick/host/rtsx_usb_ms.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/memstick/host/rtsx_usb_ms.c
+++ b/drivers/memstick/host/rtsx_usb_ms.c
@@ -681,6 +681,7 @@ static int rtsx_usb_detect_ms_card(void
 	int err;
 
 	for (;;) {
+		pm_runtime_get_sync(ms_dev(host));
 		mutex_lock(&ucr->dev_mutex);
 
 		/* Check pending MS card changes */
@@ -703,6 +704,7 @@ static int rtsx_usb_detect_ms_card(void
 		}
 
 poll_again:
+		pm_runtime_put(ms_dev(host));
 		if (host->eject)
 			break;
 


Patches currently in stable-queue which might be from stern@rowland.harvard.edu are

queue-4.8/memstick-rtsx_usb_ms-manage-runtime-pm-when-accessing-the-device.patch
queue-4.8/memstick-rtsx_usb_ms-runtime-resume-the-device-when-polling-for-cards.patch
queue-4.8/mmc-rtsx_usb_sdmmc-avoid-keeping-the-device-runtime-resumed-when-unused.patch
queue-4.8/mmc-rtsx_usb_sdmmc-handle-runtime-pm-while-changing-the-led.patch