On Sat, 2014-01-11 at 08:56 +1300, Thomas Kear wrote:
USB3 gigabit ethernet adapters with the ASIX AX88179 chipset (LevelOne
USB0401-V3, Plugable USB3-E1000, SIIG JU-NE0211-S1 and others) are
experiencing kernel panics in usb_hcd_map_urb_for_dma since 3.12.
[...]
So far as I can tell, the driver is unaffected as late as 3.11.6, but
problematic as of 3.12 (and still affected in 3.13-rc5). The history
of drivers/net/usb/ax88179_178a.c for this time period yields this
patch, which at least in my somewhat limited understanding appeared a
likely candidate. I've reverted this on my system - against several
linux-next builds from the last 3-4 weeks - and have had no issues
with this network controller since.
commit 3804fad45411b48233b48003e33a78f290d227c8
Author: Ming Lei [off-list ref]
Date: Thu Aug 8 21:48:25 2013 +0800
USBNET: ax88179_178a: enable tso if usb host supports sg dma
Enabling SG DMA here has unfortunately caused a number of regressions as
the XHCI (USB 3 controller) hardware is a bit inflexible and the driver
wasn't quite ready to handle the SG lists generated for net devices.
I don't think I've seen this particular symptom though, and it might
indicate a bug in usbnet.
[...]
[2] http://i.imgur.com/NCanPUY.jpg
For those joining us on linux-usb, this is a photo of the panic.
Ben.
--
Ben Hutchings, Staff Engineer, Solarflare
Not speaking for my employer; that's the marketing department's job.
They asked us to note that Solarflare product names are trademarked.
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