[Oneiric/Natty][SRU][PATCH 0/1] rt2x00: Serialize TX operations on a queue.

[Seth Forshee]

On Fri, Sep 23, 2011 at 09:19:58AM -0700, leann.ogasawara at canonical.com wrote:
> From: Leann Ogasawara <leann.ogasawara at canonical.com>
> 
> BugLink: https://bugs.launchpad.net/bugs/855239
> 
> == SRU Justification ==
> The rt2x00 driver gets frequent occurrences of the following error
> message when operating under load:
> 
>   phy0 -> rt2x00queue_write_tx_frame: Error - Arrived at non-free entry in
>   the non-full queue 2.
> 
> Wireless eventually fails and the driver must be reloaded in order to
> operate.
> 
> For Oneiric, this is a clean cherry-pick from upstream commit 77a861c4.
> Natty needed minor fix-ups to apply cleanly.  Bug reporter has tested
> and confirmed this resolves the issue.
> 
> == Impact ==
> Bug reporter has Ralink corp. RT2800 802.11n PCI [1814:0601] card
> 
> == Test Case ==
> Under load look for the message "phy0 -> rt2x00queue_write_tx_frame: Error - Arrived
> at non-free entry in the non-full queue 2." and wifi eventually fails.
> With a patched kernel, under load, message is not see and wifi continues
> to function.
> 
> == Fix ==
> Upstream commit 77a861c405da75d81e9e6e32c50eb7f9777777e8
> 
> Gertjan van Wingerde (1):
>   rt2x00: Serialize TX operations on a queue.
> 
>  drivers/net/wireless/rt2x00/rt2x00queue.c |   21 ++++++++++++++++-----
>  drivers/net/wireless/rt2x00/rt2x00queue.h |    2 ++
>  2 files changed, 18 insertions(+), 5 deletions(-)

For both:

Acked-by: Seth Forshee <seth.forshee at canonical.com>