4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
commit 796aa46adf1d90eab36ae06a42e6d3f10b28a75c 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@xxxxxxxxxxxxxx>
Tested-by: Ritesh Raj Sarraf <rrs@xxxxxxxxxxxxxx>
Signed-off-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/memstick/host/rtsx_usb_ms.c | 2 ++
1 file changed, 2 insertions(+)
--- 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
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
}
poll_again:
+ pm_runtime_put(ms_dev(host));
if (host->eject)
break;
--
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