3.6.11.9-rc1 stable review patch.
If anyone has any objections, please let me know.
------------------
From: William Gulland <wgull...@google.com>
[ Upstream commit 2c7b871b9102c497ba8f972aa5d38532f05b654d ]
Control transfers have both IN and OUT (or SETUP) packets, so when
clearing TT buffers for a control transfer it's necessary to send
two HUB_CLEAR_TT_BUFFER requests to the hub.
Signed-off-by: William Gulland <wgull...@google.com>
Acked-by: Alan Stern <st...@rowland.harvard.edu>
Cc: stable <sta...@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
Signed-off-by: Steven Rostedt <rost...@goodmis.org>
---
drivers/usb/core/hub.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index fe7faf0..74ae3a5 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -711,6 +711,15 @@ resubmit:
static inline int
hub_clear_tt_buffer (struct usb_device *hdev, u16 devinfo, u16 tt)
{
+ /* Need to clear both directions for control ep */
+ if (((devinfo >> 11) & USB_ENDPOINT_XFERTYPE_MASK) ==
+ USB_ENDPOINT_XFER_CONTROL) {
+ int status = usb_control_msg(hdev, usb_sndctrlpipe(hdev, 0),
+ HUB_CLEAR_TT_BUFFER, USB_RT_PORT,
+ devinfo ^ 0x8000, tt, NULL, 0, 1000);
+ if (status)
+ return status;
+ }
return usb_control_msg(hdev, usb_sndctrlpipe(hdev, 0),
HUB_CLEAR_TT_BUFFER, USB_RT_PORT, devinfo,
tt, NULL, 0, 1000);
--
1.7.10.4
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