On Mon, Apr 26, 2021 at 09:55:06PM +0200, Niccolò Belli wrote:
> My Aeon Labs ZWave USB stick doesn't work anymore since 5.11.12-arch1-1:
> [ 193.677337] usb 2-2: new full-speed USB device number 5 using xhci_hcd
> [ 193.818112] usb 2-2: New USB device found, idVendor=0658,
> idProduct=0200, bcdDevice= 0.00
> [ 193.818117] usb 2-2: New USB device strings: Mfr=0, Product=0,
> SerialNumber=0
> [ 194.372999] cdc_acm 2-2:1.0: ttyACM0: USB ACM device
> [ 194.373197] usbcore: registered new interface driver cdc_acm
> [ 194.373199] cdc_acm: USB Abstract Control Model driver for USB modems
> and ISDN adapters
> [ 200.173616] cdc_acm 2-2:1.0: acm_port_activate - usb_submit_urb(ctrl
> irq) failed
>
> It works fine on 5.11.11-arch1-1 and on a Fedora 34 Live USB with kernel
> 5.11.16.
> Arch's 5.11.16 doesn't work and latest Arch's linux-lts doesn't work
> either.
I'm afraid this is a known regression due to a buggy stable backport.
The fix is now in Linus's tree:
a8b3b519618f ("USB: CDC-ACM: fix poison/unpoison imbalance")
and should be backported very soon.
Johan
