On Thu, Dec 08, 2011 at 11:04:48AM -0800, Grant Grundler wrote: > On Thu, Dec 8, 2011 at 10:02 AM, Greg KH <greg@xxxxxxxxx> wrote: > > On Wed, Dec 07, 2011 at 02:40:49PM -0800, Grant Grundler wrote: > >> Hi, > >> I'm testing asix (USB 100BT ethernet adapter with AX88772) driver > >> initialization (and shut down) paths and reproduced a > >> "skb_queue_purge" panic 3 times after a few hundred/thousand > >> iterations of rmmod/modprobe. I'm inclined to believe > >> skb_queue_purge() is a victim and not a culprit here. > >> > >> I don't know if all 3 "spontaneous reboots" I've seen have the same > >> stack trace as the one I have a record for: > > > > Have you tried this on 3.1, and especially, 3.2-rc? > > Hi Greg, > I haven't tried any thing later yet. I would consider it if someone > could point at a change(s) that might be relevant to the symptom. > > > > A number of asix > > patches have gone into the 3.2-rc series, perhaps they might have > > resolved this problem already? > > I'm the one who submitted those changes. :) Heh, oops, sorry about that :) > asix.c driver I'm testing was pulled directly from davem's net-next > tree and I believe that's what is in 3.2-rc series now. > > Those changes only relate to AX88772 and AX88178 bind and reset code. > suspend/resume support is unchanged - though I suspect ax*_reset > functions get called in resume. > > It's possible this code path in asix.c has *always* been broken. I see > two drivesr/net/usbnet USB drivers that do this: > > drivers/net/usb/cdc_ether.c 614 .reset_resume = usbnet_resume, > drivers/net/usb/cdc_ncm.c 1193 .reset_resume = usbnet_resume, > > Even though most usbnet drivers don't, I'm tempted to add this code > and "just try it": Let us know if that works or not. thanks, greg k-h -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
