From 99c515005857ff7d6cd5c2ba272ccab5dc0ea648 Mon Sep 17 00:00:00 2001 From: Daniel Mack Date: Wed, 13 Jun 2012 12:54:45 +0200 Subject: [PATCH] usb: gadget: hidg: register OUT INT endpoint for SET_REPORT The hidg function driver currently handles its SET_REPORT calls via EP0. This is the implicit behaviour when no OUT interrupt endpoint is configured and generally works fine. The problem is that due to EP0's role in the gadget framework, we cannot hold back packets and control traffic flow to sync it to the char device, and hence there's a high risk of loosing packets with this implementation. This patch adds an OUT interrupt endpoint to the interface and queues a fix number of request to catch SET_REPORT events. According to the specs, host drivers should always use the dedicated OUT endpoint when present. The char device's read implementation was rewritten to retrieve data from the list of completed output requests. Signed-off-by: Daniel Mack Cc: Felipe Balbi Cc: Greg Kroah-Hartman Signed-off-by: Felipe Balbi --- Reading git-format-patch failed