From: Oliver Neukum <oneukum@suse.com>
To: "Schmid, Carsten" <Carsten_Schmid@mentor.com>,
"f.fainelli@gmail.com" <f.fainelli@gmail.com>
Cc: "linux-usb@vger.kernel.org" <linux-usb@vger.kernel.org>
Subject: Re: Strange behaviour of D-Link DUB-1312 USB 3.0 Adapters
Date: Wed, 14 Aug 2019 10:31:48 +0200 [thread overview]
Message-ID: <1565771508.25764.3.camel@suse.com> (raw)
In-Reply-To: <db0e8930ea94408ca7a38192ddfd203f@SVR-IES-MBX-03.mgc.mentorg.com>
Am Mittwoch, den 14.08.2019, 08:17 +0000 schrieb Schmid, Carsten :
> [Resend - had mailer errors ]
>
> Hi Florian,
>
> today i have seen a strange behaviour of two D-Link DUB-1312 adapters (same Revision A1).
> Plugging them into the same port (!) on my device one of them is recognized as SuperSpeed, the other as high speed ???
> (working on 4.14.129 LTS)
>
> From dmesg, the "faulty" one:
> [ 530.585871] usb 1-2: new high-speed USB device number 4 using xhci_hcd <<<<<<<<< HUH ????
XHCI is not like EHCI. It needs no companion controller, as it serves
all speeds.
> I had a look at the driver code of ax88179, but that one didn't change much in the past up to v5.2.
> Nothing that explains what i can see here.
This is on a lower layer than ax88179. This comes from xhci_hcd.
Is this a regression?
Regards
Oliver
next prev parent reply other threads:[~2019-08-14 8:31 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-14 8:17 Strange behaviour of D-Link DUB-1312 USB 3.0 Adapters Schmid, Carsten
2019-08-14 8:31 ` Oliver Neukum [this message]
2019-08-14 8:56 ` AW: " Schmid, Carsten
2019-08-14 10:22 ` Schmid, Carsten
2019-08-14 13:07 ` Oliver Neukum
2019-08-15 12:02 ` AW: " Schmid, Carsten
2019-08-16 11:56 ` Schmid, Carsten
2019-08-19 12:11 ` Oliver Neukum
2019-08-19 12:27 ` AW: " Schmid, Carsten
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