linux-kernel - Re: [lkp] [staging] 68905a14e49: kernel BUG at drivers/base/driver.c:153!

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Message-ID: <20150807071553.GA28337@sudip-pc>
Date:	Fri, 7 Aug 2015 12:45:53 +0530
From:	Sudip Mukherjee <sudipm.mukherjee@...il.com>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	kernel test robot <ying.huang@...el.com>,
	David Kershner <david.kershner@...sys.com>, lkp@...org,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [lkp] [staging] 68905a14e49: kernel BUG at
 drivers/base/driver.c:153!

On Thu, Aug 06, 2015 at 07:28:12PM -0700, Greg Kroah-Hartman wrote:
> 
> 
> On Sat, Aug 01, 2015 at 01:12:05PM +0800, kernel test robot wrote:
<snip>
> > [   12.276231] RIP 
> > [   12.276231] RIP  [<ffffffff81b68e78>] driver_register+0xa8/0xe0
> >  [<ffffffff81b68e78>] driver_register+0xa8/0xe0
> > [   12.276231]  RSP <ffff8800001a3e30>
> > [   12.276231]  RSP <ffff8800001a3e30>
> > [   12.403330] ---[ end trace 075c805d53b02836 ]---
> > [   12.403330] ---[ end trace 075c805d53b02836 ]---
> 
> David, any ideas of what needs to be done to fix this?

Hi Greg,
I was having a quick look and it looks like visorchipset is not yet
initialised and the bus is not yet registered. If you remember we had a
loooong discussion in another thread "usb: ulpi: don't register drivers
if bus doesn't exist", I sent a proposed patch also. For your reference:
"http://www.spinics.net/lists/linux-usb/msg125368.html".
I think this one is the perfect example of that case here.

regards
sudip
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