[PATCH] hid-core: Add Clear-Halt on the Interrupt-in endpoint

This patch (as577) adds a Clear-Halt call on the Interrupt-in endpoint
during input device configuration.  Without it my HP USB keyboard doesn't
work.

Vojtech says it's worth trying, since it might help with some recalcitrant
devices.  On the other hand, it might interfere with others.  I'm
submitting it so that it can get tested by a range of users.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/usb/input/hid-core.c b/drivers/usb/input/hid-core.c
index f7fcce731f5..79ddce4555a 100644
--- a/drivers/usb/input/hid-core.c
+++ b/drivers/usb/input/hid-core.c
@@ -1784,6 +1784,9 @@ static struct hid_device *usb_hid_configure(struct usb_interface *intf)
         hid->urbctrl->transfer_dma = hid->ctrlbuf_dma;
         hid->urbctrl->transfer_flags |= (URB_NO_TRANSFER_DMA_MAP | URB_NO_SETUP_DMA_MAP);
 
+        /* May be needed for some devices */
+        usb_clear_halt(hid->dev, hid->urbin->pipe);
+
         return hid;
 
 fail: