Re: [PATCH AUTOSEL 5.9 054/111] USB: cdc-acm: handle broken union descriptors

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On Sun, Oct 18, 2020 at 03:17:10PM -0400, Sasha Levin wrote:
> From: Johan Hovold <johan@xxxxxxxxxx>
> 
> [ Upstream commit 960c7339de27c6d6fec13b54880501c3576bb08d ]
> 
> Handle broken union functional descriptors where the master-interface
> doesn't exist or where its class is of neither Communication or Data
> type (as required by the specification) by falling back to
> "combined-interface" probing.
> 
> Note that this still allows for handling union descriptors with switched
> interfaces.
> 
> This specifically makes the Whistler radio scanners TRX series devices
> work with the driver without adding further quirks to the device-id
> table.
> 
> Reported-by: Daniel Caujolle-Bert <f1rmb.daniel@xxxxxxxxx>
> Tested-by: Daniel Caujolle-Bert <f1rmb.daniel@xxxxxxxxx>
> Acked-by: Oliver Neukum <oneukum@xxxxxxxx>
> Signed-off-by: Johan Hovold <johan@xxxxxxxxxx>
> Link: https://lore.kernel.org/r/20200921135951.24045-3-johan@xxxxxxxxxx
> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

I was surprised to see this picked up by AUTOSEL since I remember adding
a stable tag to this patch (to v2, changed my mind since v1) -- and it's
there in the lore link above.

Greg, just to make sure this wasn't due to a b4 bug; did you drop the
stable tag on purpose when applying?

The tag-order has been reshuffled by b4 too it seems (I know, some
people think that's ok) so maybe it fell out in the process.

Johan



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