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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>
This commit is contained in:
Alan Stern 2016-09-26 15:45:41 -07:00 committed by Ulf Hansson
parent 4f48aa7a11
commit 796aa46adf
1 changed files with 2 additions and 0 deletions
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2
drivers/memstick/host/rtsx_usb_ms.c
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@ -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;