From: sashiko-bot@kernel.org
To: "Danny Zimmer" <dzimmer50@googlemail.com>
Cc: linux-usb@vger.kernel.org
Subject: Re: [PATCH] USB: quirks: add DEVICE_QUALIFIER quirk for Mobapad C2 Lite gamepad
Date: Thu, 22 Oct 2026 06:15:58 +0000 [thread overview]
Message-ID: <sashiko-outbox-181069@kernel.org> (raw)
In-Reply-To: <20261022061214.3497578-1-dzimmer50@googlemail.com>
> The Mobapad C2 Lite gamepad in its "Xbox 360 Controller for Windows" mode
> (USB ID 2345:e06e) fails to enumerate on Linux and enters an endless
> connect/reset loop. A USB trace shows the device returns its device
> descriptor, but then stalls the Device_Qualifier request and stops
> answering any further control transfers, so the host resets it and the
> cycle repeats indefinitely.
>
> The device works on Windows, which does not issue a Device_Qualifier
> request. Setting USB_QUIRK_DEVICE_QUALIFIER so the host skips that request
> lets the device enumerate normally; the configuration descriptor is then
> read at its usual size without problems and the controller binds as an
> xpad gamepad.
>
> Tested on two hosts (x86_64/xhci and Raspberry Pi 3B/dwc_otg).
>
> Signed-off-by: Danny Zimmer <dzimmer50@googlemail.com>
Sashiko has reviewed this patch and found no issues.
--
Sashiko AI review · https://sashiko.dev/#/patchset/20261022061214.3497578-1-dzimmer50@googlemail.com?part=1
prev parent reply other threads:[~2026-10-22 6:15 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-22 6:12 [PATCH] USB: quirks: add DEVICE_QUALIFIER quirk for Mobapad C2 Lite gamepad Danny Zimmer
2026-10-22 6:15 ` sashiko-bot [this message]
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