From: Imre Palik <imrep....@gmail.com>
Date: Fri, 19 Jun 2015 14:21:51 +0200
> From: "Palik, Imre" <im...@amazon.de>
>
> Commit edafc132baac ("xen-netback: making the bandwidth limiter runtime
> settable")
> introduced the capability to change the bandwidth rate limit at runtime.
> But it also introduced a possible crashing bug.
>
> If netback receives two XenbusStateConnected without getting the
> hotplug-status watch firing in between, then it will try to register the
> watches for the rate limiter again. But this triggers a BUG() in the watch
> registration code.
>
> The fix modifies connect() to remove the possibly existing packet-rate
> watches before trying to install those watches. This behaviour is in line
> with how connect() deals with the hotplug-status watch.
>
> Signed-off-by: Imre Palik <im...@amazon.de>
> Cc: Matt Wilson <m...@amazon.com>
Applied, thank you.
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