linux-kernel - [PATCH v3 1/3] usb: gadget: add quirk_ep_out_aligned_size field to struct usb

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Date:	Wed, 30 Oct 2013 10:06:16 -0700
From:	David Cohen <david.a.cohen@...ux.intel.com>
To:	balbi@...com, gregkh@...uxfoundation.org
Cc:	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
	stern@...land.harvard.edu, Paul.Zimmerman@...opsys.com,
	David Cohen <david.a.cohen@...ux.intel.com>
Subject: [PATCH v3 1/3] 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.

Signed-off-by: David Cohen <david.a.cohen@...ux.intel.com>
---
 include/linux/usb/gadget.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h
index 942ef5e..9405d0f 100644
--- a/include/linux/usb/gadget.h
+++ b/include/linux/usb/gadget.h
@@ -540,6 +540,9 @@ struct usb_gadget {
 	struct device			dev;
 	unsigned			out_epnum;
 	unsigned			in_epnum;
+
+	/* epout requires buffer size to be aligned to MaxPacketSize */
+	unsigned			quirk_ep_out_aligned_size:1;
 };
 #define work_to_gadget(w)	(container_of((w), struct usb_gadget, work))
 
-- 
1.8.4.rc3

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