usb: gadget: add quirk_ep_out_aligned_size field to struct usb_gadget
authorDavid Cohen <david.a.cohen@linux.intel.com>
Mon, 9 Dec 2013 23:55:35 +0000 (15:55 -0800)
committerFelipe Balbi <balbi@ti.com>
Tue, 10 Dec 2013 04:44:05 +0000 (22:44 -0600)
commit0b2d2bbade59ab2067f326d6dbc2628bee227fd5
tree8897b37afb209edd04aa0f5773493ec057a6f2ea
parentd8318d7f6bd08eba36ed2a7a23ac5389115958bc
usb: gadget: add quirk_ep_out_aligned_size field to struct usb_gadget

Due to USB controllers may have different restrictions, usb gadget layer
needs to provide a generic way to inform gadget functions to complain
with non-standard requirements.

This patch adds 'quirk_ep_out_aligned_size' field to struct usb_gadget
to inform when controller's epout requires buffer size to be aligned to
MaxPacketSize. A helper is also provided to align buffer size when
necessary.

Cc: Alan Stern <stern@rowland.harvard.edu>
Acked-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: David Cohen <david.a.cohen@linux.intel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
include/linux/usb/gadget.h