diff options
| author | Peter Chen <peter.chen@nxp.com> | 2017-03-14 13:57:39 +0800 |
|---|---|---|
| committer | Leonard Crestez <leonard.crestez@nxp.com> | 2018-08-24 12:41:33 +0300 |
| commit | 6804aa5a77c29f3bf3afd889498fa527204f212d (patch) | |
| tree | 91ff071df2bd05061eddc5ceaefcc8a5700a1e67 /drivers/usb/chipidea/ci.h | |
| parent | b2d3210f733ecf32239e25d6768565aa79e87ac4 (diff) | |
MLK-14396 usb: chipidea: add mutex for concurrent running
The ci_handle_id_switch is called at two places, at very rare situations,
it may be running at the same time. Eg, when the system is back from
the resume, the id event is occurred from extcon driver, as well as
power_lost work item is called due to the controller is poweroff at
the suspend.
Signed-off-by: Peter Chen <peter.chen@nxp.com>
Diffstat (limited to 'drivers/usb/chipidea/ci.h')
| -rw-r--r-- | drivers/usb/chipidea/ci.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/usb/chipidea/ci.h b/drivers/usb/chipidea/ci.h index 9c8d20d5f5c8..591536f1d6a6 100644 --- a/drivers/usb/chipidea/ci.h +++ b/drivers/usb/chipidea/ci.h @@ -205,6 +205,7 @@ struct hw_bank { * @in_lpm: if the core in low power mode * @wakeup_int: if wakeup interrupt occur * @rev: The revision number for controller + * @mutex: protect code from concorrent running */ struct ci_hdrc { struct device *dev; @@ -268,6 +269,7 @@ struct ci_hdrc { u32 pm_portsc; u32 pm_usbmode; struct work_struct power_lost_work; + struct mutex mutex; }; static inline struct ci_role_driver *ci_role(struct ci_hdrc *ci) |