ural(4) hits usb/124758 (Was: Panic while using ural(4) with wpa_supplicant)

[Paul B. Mahol]

On 12/15/08, Kip Macy <kmacy at freebsd.org> wrote:
> I reliably hit panics with ural(4) as well - they appear to be locking
> related.
>

Correct, this PR is same as one from me - but mine is for rum driver.
using kern.smp.disabled=1 is workaround.
usb2_wlan_rum from usb2 doesnt have that problem - I do not use old
usb stack any more.

> Cheers,
> Kip
>
> On Mon, Dec 15, 2008 at 5:12 AM, Damian Gerow <dgerow at afflictions.org>
> wrote:
>> I've been able to reliably trigger the panic with ural(4), but I'm pretty
>> sure it has nothing to do with wpa_supplicant(8).  A quick search of the
>> PR
>> database turns up usb/124758.
>>
>> Panic (PID 12 is "irq19: ehci1"):
>>
>> -----
>> ural0: could not transmit buffer: SHORT_XFER
>> panic: ehci_free_sqtd_chain: chain not found
>> cpuid = 0
>> KDB: enter: panic
>> [thread pid 12 tid 100042]
-- 
Paul