Messages in this thread Patch in this message | | | From | Ulf Hansson <> | Subject | [PATCH 3/6] memstick: rtsx_usb_ms: Runtime resume the device when polling for cards | Date | Thu, 13 Oct 2016 13:37:37 +0200 |
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From: Alan Stern <stern@rowland.harvard.edu>
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> --- 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)); 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; -- 1.9.1
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