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

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>
Cc: <stable@vger.kernel.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

diff --git a/drivers/memstick/host/rtsx_usb_ms.c b/drivers/memstick/host/rtsx_usb_ms.c
index d34bc35303851634d143f924a790a47a7f006e8c..1b994897f0ff7a7e14cdc331350ea346acfddba0 100644 (file)
--- 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));
                mutex_lock(&ucr->dev_mutex);
 
                /* Check pending MS card changes */
@@ -703,6 +704,7 @@ static int rtsx_usb_detect_ms_card(void *__host)
                }
 
 poll_again:
+               pm_runtime_put(ms_dev(host));
                if (host->eject)
                        break;