Hello.
On 09-01-2013 12:45, Lan Tianyu wrote:
This patch is to expose usb port's pm qos flags(pm_qos_no_power_off,
pm_qos_remote_wakeup) to user space. User can set pm_qos_no_power_off
flag to prohibit the port from being powered off.
Signed-off-by: Lan Tianyu <[email protected]>
---
drivers/usb/core/port.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/core/port.c b/drivers/usb/core/port.c
index 77400f8..6bb5b2b 100644
--- a/drivers/usb/core/port.c
+++ b/drivers/usb/core/port.c
[...]
@@ -172,7 +173,15 @@ int usb_hub_create_port_device(struct usb_hub *hub, int
port1)
goto error_register;
pm_runtime_set_active(&port_dev->dev);
- pm_runtime_enable(&port_dev->dev);
+
+ /* It would be dangerous if user space couldn't
+ * prevent usb device from being powered off. So not
s/not/don't/
+ * enable port runtime pm if fail to expose port's pm qos.
s/fail/failed/
WBR, Sergei
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