3.16.40-rc1 review patch. If anyone has any objections, please let me know. ------------------ From: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> 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@xxxxxxxxxxxxxx> Tested-by: Ritesh Raj Sarraf <rrs@xxxxxxxxxxxxxx> Signed-off-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> Signed-off-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx> Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx> --- 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;