linux-kernel - drivers/usb/gadget/r8a66597-udc.h:139: warning: ‘data’ may be used uninitialized in this function

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Message-ID: <20100519110030.GG30804@buzzloop.caiaq.de>
Date:	Wed, 19 May 2010 13:00:30 +0200
From:	Daniel Mack <daniel@...que.org>
To:	linux-kernel@...r.kernel.org
Cc:	David Brownell <dbrownell@...rs.sourceforge.net>,
	Greg Kroah-Hartman <gregkh@...e.de>,
	Paul Mundt <lethal@...ux-sh.org>,
	Magnus Damm <damm@...l.co.jp>,
	Yoshihiro Shimoda <shimoda.yoshihiro@...esas.com>,
	Andrea Gelmini <andrea.gelmini@...ma.net>,
	linux-usb@...r.kernel.org
Subject: drivers/usb/gadget/r8a66597-udc.h:139: warning: ‘data’ may be used uninitialized in this function

Hi,

I stumbled over the r8a66597 UDC gadget driver as the the compiler
complained about the static inline function r8a66597_read():

drivers/usb/gadget/r8a66597-udc.c: In function ‘irq_packet_read’:
drivers/usb/gadget/r8a66597-udc.h:139: warning: ‘data’ may be used uninitialized in this function
drivers/usb/gadget/r8a66597-udc.h:139: note: ‘data’ was declared here

I know nothing about the code, but this function indeed looks bogus. Can
anyone have a look at this? Also, I wonder whether this function is
actually too big for a static inline.

Thanks,
Daniel

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