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

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commit 796aa46adf 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>
This commit is contained in:
Alan Stern
2016-09-26 15:45:41 -07:00
committed by Greg Kroah-Hartman
parent 74005674c8
commit d538518771
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;