Re: Occasional truncated scan results

[Ronald Wahl <ronald.wahl@raritan.com>]

On 28.02.2012 16:24, Johannes Berg wrote:
> On Tue, 2012-02-28 at 16:15 +0100, Ronald Wahl wrote:
>> My problem is not that the scan results are larger than 64k. The user
>> space is coded so that it provides a small buffer that is doubled in
>> size until the data fits into the buffer. But the kernel code does not
>> always detect the case that the buffer is almost full and just starts
>> skipping some data without notifying user space with E2BIG.
>
> Ok. Yes, this could be fixed by making sure that a single BSS is
> atomically written or not written -- probably simply by rolling back at
> the end of the function if it didn't fit and returning an error etc. If
> you wanted to work on this, I'd review&  accept the patch, but I have no
> intention whatsoever to do this myself :-)

I'll first check if I can use the nl80211 interface in all cases. If not 
I'll probably come up with a patch. Thanks!

- ron

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