diff options
| author | Chunfeng Yun <chunfeng.yun@mediatek.com> | 2021-05-12 10:07:38 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-05-19 10:13:15 +0200 |
| commit | 9238492b9a8402d388c9fe370d3cbee838f97c3a (patch) | |
| tree | 5ab5c6e4cf0455cf91f6a74cfaaaa2e0b6a2d8ef /drivers | |
| parent | 45ad6b592e644c1c3c4d0858a891cf977c5a10b7 (diff) | |
usb: core: hub: fix race condition about TRSMRCY of resume
commit 975f94c7d6c306b833628baa9aec3f79db1eb3a1 upstream.
This may happen if the port becomes resume status exactly
when usb_port_resume() gets port status, it still need provide
a TRSMCRY time before access the device.
CC: <stable@vger.kernel.org>
Reported-by: Tianping Fang <tianping.fang@mediatek.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Link: https://lore.kernel.org/r/20210512020738.52961-1-chunfeng.yun@mediatek.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/core/hub.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index 22a86ae4f639..228e3d4e1a9f 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -3592,9 +3592,6 @@ int usb_port_resume(struct usb_device *udev, pm_message_t msg) * sequence. */ status = hub_port_status(hub, port1, &portstatus, &portchange); - - /* TRSMRCY = 10 msec */ - msleep(10); } SuspendCleared: @@ -3609,6 +3606,9 @@ int usb_port_resume(struct usb_device *udev, pm_message_t msg) usb_clear_port_feature(hub->hdev, port1, USB_PORT_FEAT_C_SUSPEND); } + + /* TRSMRCY = 10 msec */ + msleep(10); } if (udev->persist_enabled) |