linux-kernel - Re: [PATCH] USB: add USB test and measurement class driver

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Message-ID: <20080827161550.GE19710@kroah.com>
Date:	Wed, 27 Aug 2008 09:15:50 -0700
From:	Greg KH <greg@...ah.com>
To:	Oliver Neukum <oliver@...kum.org>
Cc:	linux-usb@...r.kernel.org, Stefan Kopp <stefan_kopp@...lent.com>,
	Marcel Janssen <korgull@...e.nl>,
	Felipe Balbi <me@...ipebalbi.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] USB: add USB test and measurement class driver

Ok, as I've responded to this multiple times, now summarizing so I make
sure I got everything...

On Wed, Aug 27, 2008 at 10:56:36AM +0200, Oliver Neukum wrote:
> Am Mittwoch 27 August 2008 02:05:01 schrieb Greg KH:
>  
> > I've now added this to my tree, and any review comments are greatly
> > welcome.
> 
> Unfortunately the issues are not trivial.
> 
> 1. USBTMC_SIZE_IOBUFFER
> use 2048. 4096 means a multipage allocation

changed.

> 2. usbtmc_open race with disconnect
> already mailed about

fixed.

> 3. read/write and, if you convert to unlocked_ioctl, need protection
> against reentry

fixed and changed to unlocked_ioctl.

> 4. read, write & ioctl need protection against using a rebound interface
> you add a mutex, that you need for (3) anyway to the descriptor and protected
> by this mutex you set the interface and device pointers to null in disconnect
> and check them in the affected methods

Should now be fixed.

> 5.get_capabilities
> kmalloced buffer is never freed

fixed.

> 6. disconnect fails to remove sysfs attributes

fixed.

> 7. probe will report success even if usb_register_dev fails

fixed.

I'll post a new version now.

thanks a lot for the review, I really appreciate it.

greg k-h
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