From: Greg KH <gregkh@linuxfoundation.org>
To: Virupax Sadashivpetimath <virupax.sadashivpetimath@stericsson.com>
Cc: balbi@ti.com, linux-usb@vger.kernel.org,
linux-kernel@vger.kernel.org, praveen.nadahally@stericsson.com
Subject: Re: [PATCH] usb:musb:musb_host: Handle highmem in PIO mode
Date: Thu, 2 Aug 2012 04:00:10 -0700 [thread overview]
Message-ID: <20120802110010.GA5443@kroah.com> (raw)
In-Reply-To: <1343889402-7826-1-git-send-email-virupax.sadashivpetimath@stericsson.com>
On Thu, Aug 02, 2012 at 12:06:42PM +0530, Virupax Sadashivpetimath wrote:
> In case of USB bulk transfer, when himem page
> is received, the usb_sg_init function sets the
> urb transfer buffer to NULL. When such URB
> transfer is handled, kernel crashes in PIO mode.
> Handle this by mapping the highmem buffer in PIO mode.
>
> Signed-off-by: Virupax Sadashivpetimath <virupax.sadashivpetimath@stericsson.com>
Why is this not a problem in any other host controller? Are you sure
this fix is correct? Why do you need to modify the struct urb for this?
greg k-h
next prev parent reply other threads:[~2012-08-02 11:00 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-02 6:36 [PATCH] usb:musb:musb_host: Handle highmem in PIO mode Virupax Sadashivpetimath
2012-08-02 11:00 ` Greg KH [this message]
2012-08-02 12:05 ` Virupax SADASHIVPETIMATH
2012-08-02 12:35 ` Virupax SADASHIVPETIMATH
2012-08-02 14:48 ` Alan Stern
2012-08-03 7:26 ` Virupax SADASHIVPETIMATH
2012-08-03 14:46 ` Alan Stern
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