Subject: Re: [PATCH] bcm43xx-d80211: measure the channel change time

From: Johannes Berg <[email-masked]>
Date: Thu, 04 May 2006 14:22:20 +0200

On Thu, 2006-05-04 at 11:11 +0200, Jiri Benc wrote:

> I think some safety fallback would be better. Like
> if (stop - start < SOME_MIN_VALUE) channel_change_time = SOME_MIN_VALUE
> (of course, this won't work because stop and start are unsigned, but you
> probably got the idea).

Probably. And yes, it should still work since stop>start at all times.

> And couldn't TSF counter overflow during the measurement?

Yes, if the card has been up for like 459148 years or has been reset to
an unbelievably high value. Remember, it's a 64 bit counter.

johannes