Re: [PATCH] /dev/mem: Fix wrong error on accessing beyond valid memory addresses.

[Andrei Warkentin <awarkentin@vmware.com>]

Hi Peter,

----- Original Message -----
> From: "Andrei Warkentin" <andreiw@vmware.com>
> To: linux-kernel@vger.kernel.org
> Cc: "Andrei Warkentin" <andreiw@vmware.com>, "H. Peter Anvin" <hpa@zytor.com>
> Sent: Wednesday, November 9, 2011 6:31:19 PM
> Subject: [PATCH] /dev/mem: Fix wrong error on accessing beyond valid memory addresses.
> 
> Currently this returns -EFAULT, but it really should be returning 0,
> as in - 0 bytes read or written. This is what you would get by
> opening a block device, seeking to the end, and trying to read
> something. Additionally, make lseek() check the sought-to offset
> to pass the valid_phys_addr_range test.
> 
> Cc: H. Peter Anvin <hpa@zytor.com>
> Signed-off-by: Andrei Warkentin <andreiw@vmware.com>
> ---

I know you're very busy, but I was wondering if you could
give your two cents on this change. This change grew from
our discussion on LKML last week.

Thanks ahead,
A