Nouveau - Sep 2013 - meaning?

What does this mean:
[  626.850292] nouveau E[   PFIFO][0000:01:00.0] DMA_PUSHER - ch 2 [X[2059]] get
0x0020008e60 put 0x0020008e80 ib_get 0x00000093 ib_put 0x000000a3 state
0x80004861 (err: INVALID_CMD) push 0x00406040
[  659.132581] nouveau E[   PFIFO][0000:01:00.0] DMA_PUSHER - ch 2 [X[2059]] get
0x00200238cc put 0x002002408c ib_get 0x0000035e ib_put 0x00000361 state
0x80004861 (err: INVALID_CMD) push 0x00500031
[  659.132606] nouveau E[   PFIFO][0000:01:00.0] DMA_PUSHER - ch 2 [X[2059]] get
0x002000fb40 put 0x002000fb60 ib_get 0x0000035f ib_put 0x00000361 state
0x80000000 (err: INVALID_CMD) push 0x00406040

It means that an invalid command made it into the fifo. However I'm
not sure why that's happening -- at the very least, 0x00406040 seems
like a perfectly legitimate command.

On Thu, Sep 5, 2013 at 11:21 PM, James <bjlockie at lockie.ca>
wrote:
>
> What does this mean:
> [  626.850292] nouveau E[   PFIFO][0000:01:00.0] DMA_PUSHER - ch 2
[X[2059]] get 0x0020008e60 put 0x0020008e80 ib_get 0x00000093 ib_put 0x000000a3
state 0x80004861 (err: INVALID_CMD) push 0x00406040
> [  659.132581] nouveau E[   PFIFO][0000:01:00.0] DMA_PUSHER - ch 2
[X[2059]] get 0x00200238cc put 0x002002408c ib_get 0x0000035e ib_put 0x00000361
state 0x80004861 (err: INVALID_CMD) push 0x00500031
> [  659.132606] nouveau E[   PFIFO][0000:01:00.0] DMA_PUSHER - ch 2
[X[2059]] get 0x002000fb40 put 0x002000fb60 ib_get 0x0000035f ib_put 0x00000361
state 0x80000000 (err: INVALID_CMD) push 0x00406040
> _______________________________________________
> Nouveau mailing list
> Nouveau at lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/nouveau