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authorUlf Hansson <ulf.hansson@linaro.org>2016-09-28 11:33:28 -0700
committerUlf Hansson <ulf.hansson@linaro.org>2016-10-17 15:43:05 +0200
commit9158cb29e7c2f10dd325eb1589f0fe745a271257 (patch)
tree0e2f95e5c6323a1453b7270bc11602f779b5920f /drivers/memstick
parent796aa46adf1d90eab36ae06a42e6d3f10b28a75c (diff)
memstick: rtsx_usb_ms: Manage runtime PM when accessing the device
Accesses to the rtsx usb device, which is the parent of the rtsx memstick device, must not be done unless it's runtime resumed. This is currently not the case and it could trigger various errors. Fix this by properly deal with runtime PM in this regards. This means making sure the device is runtime resumed, when serving requests via the ->request() callback or changing settings via the ->set_param() callbacks. Cc: <stable@vger.kernel.org> Cc: Ritesh Raj Sarraf <rrs@researchut.com> Cc: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/memstick')
-rw-r--r--drivers/memstick/host/rtsx_usb_ms.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/memstick/host/rtsx_usb_ms.c b/drivers/memstick/host/rtsx_usb_ms.c
index 1b994897f0ff..2e3cf012ef48 100644
--- a/drivers/memstick/host/rtsx_usb_ms.c
+++ b/drivers/memstick/host/rtsx_usb_ms.c
@@ -524,6 +524,7 @@ static void rtsx_usb_ms_handle_req(struct work_struct *work)
int rc;
if (!host->req) {
+ pm_runtime_get_sync(ms_dev(host));
do {
rc = memstick_next_req(msh, &host->req);
dev_dbg(ms_dev(host), "next req %d\n", rc);
@@ -544,6 +545,7 @@ static void rtsx_usb_ms_handle_req(struct work_struct *work)
host->req->error);
}
} while (!rc);
+ pm_runtime_put(ms_dev(host));
}
}
@@ -570,6 +572,7 @@ static int rtsx_usb_ms_set_param(struct memstick_host *msh,
dev_dbg(ms_dev(host), "%s: param = %d, value = %d\n",
__func__, param, value);
+ pm_runtime_get_sync(ms_dev(host));
mutex_lock(&ucr->dev_mutex);
err = rtsx_usb_card_exclusive_check(ucr, RTSX_USB_MS_CARD);
@@ -635,6 +638,7 @@ static int rtsx_usb_ms_set_param(struct memstick_host *msh,
}
out:
mutex_unlock(&ucr->dev_mutex);
+ pm_runtime_put(ms_dev(host));
/* power-on delay */
if (param == MEMSTICK_POWER && value == MEMSTICK_POWER_ON)

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