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From: Greg KH <gregkh@linuxfoundation.org>
To: Daniele Palmas <dnlplm@gmail.com>
Cc: netdev@vger.kernel.org, linux-usb <linux-usb@vger.kernel.org>
Subject: Re: 4.16 issue with mbim modem and ping with size > 14552 bytes
Date: Thu, 24 May 2018 17:53:34 +0200	[thread overview]
Message-ID: <20180524155334.GA28874@kroah.com> (raw)
In-Reply-To: <CAGRyCJFTqJOjjx0G6fgd8f0AZ2bTo6-89Exx+HKEZCsrJM4nNw@mail.gmail.com>

On Thu, May 24, 2018 at 05:04:49PM +0200, Daniele Palmas wrote:
> Hello,
> 
> I have an issue with an USB mbim modem when trying to send with ping
> more than 14552 bytes: it looks like to me a kernel issue, but not at
> the cdc_mbim or cdc_ncm level, anyway not sure, so I'm reporting the
> issue.
> 
> My kernel is 4.16. The device is the following:

Does older kernels work, or is this something that has always been
there?

I ask, as my mobile provider does horrible things to large packet sizes.
So much so that I have to set the mtu to 1280 just to get things to work
properly when tethering my phone through to my laptop.  So this might be
a network provider issue :)

thanks,

greg k-h

  reply	other threads:[~2018-05-24 15:53 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-24 15:04 4.16 issue with mbim modem and ping with size > 14552 bytes Daniele Palmas
2018-05-24 15:53 ` Greg KH [this message]
2018-05-24 22:54   ` Daniele Palmas
2018-05-28  7:58     ` Daniele Palmas
2018-05-28  8:04       ` Greg KH

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