3.16.42-rc1 review patch. If anyone has any objections, please let me know. ------------------ From: Felipe Balbi <felipe.balbi@xxxxxxxxxxxxxxx> commit e8f29bb719b47a234f33b0af62974d7a9521a52c upstream. usb_endpoint_maxp() returns wMaxPacketSize in its raw form. Without taking into consideration that it also contains other bits reserved for isochronous endpoints. This patch fixes one occasion where this is a problem by making sure that we initialize ep->maxpacket only with lower 10 bits of the value returned by usb_endpoint_maxp(). Note that seperate patches will be necessary to audit all call sites of usb_endpoint_maxp() and make sure that usb_endpoint_maxp() only returns lower 10 bits of wMaxPacketSize. Signed-off-by: Felipe Balbi <felipe.balbi@xxxxxxxxxxxxxxx> Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx> --- drivers/usb/gadget/composite.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/usb/gadget/composite.c +++ b/drivers/usb/gadget/composite.c @@ -143,7 +143,7 @@ int config_ep_by_speed(struct usb_gadget ep_found: /* commit results */ - _ep->maxpacket = usb_endpoint_maxp(chosen_desc); + _ep->maxpacket = usb_endpoint_maxp(chosen_desc) & 0x7ff; _ep->desc = chosen_desc; _ep->comp_desc = NULL; _ep->maxburst = 0;