Re: [PATCH net,stable] cdc_ncm: workaround for EM7455 "silent" data interface

On Mon, 2016-07-04 at 13:40 +0200, Bjørn Mork wrote:

Oliver Neukum [off-list ref] writes:

quoted

On Sun, 2016-07-03 at 22:24 +0200, Bjørn Mork wrote:

quoted

Several Lenovo users have reported problems with their Sierra
Wireless EM7455 modem. The driver has loaded successfully and
the MBIM management channel has appeared to work, including
establishing a connection to the mobile network. But no frames
have been received over the data interface.

If this is needed in open() it must also be needed in reset_resume()

reset_resume needs fixing in general. This is completely unrelated to
this bug. In fact, as we don't do any NCM control messages there in the

I see. In general this would be a problem.

current resume, I'm not sure this firmware bug is triggered by it.  But
it's untestable, because:

OK, something needs to be done, but this patch is not the place to do
it.

	Regards
		Oliver


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