[PATCH 3/6] memstick: rtsx_usb_ms: Runtime resume the device when polling for cards

From: Ulf Hansson
Date: Thu Oct 13 2016 - 07:40:31 EST

From: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>

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>
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
drivers/memstick/host/rtsx_usb_ms.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/drivers/memstick/host/rtsx_usb_ms.c b/drivers/memstick/host/rtsx_usb_ms.c
index d34bc35..1b99489 100644
--- 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 *__host)
int err;

for (;;) {
+ pm_runtime_get_sync(ms_dev(host));

/* Check pending MS card changes */
@@ -703,6 +704,7 @@ static int rtsx_usb_detect_ms_card(void *__host)

+ pm_runtime_put(ms_dev(host));
if (host->eject)