Hello,

I have a HD 5870, with radeon module.
Today I upgraded to kernel 4.7 and mesa git from a few hours ago.
Can confirm this issue with SR3, still locks the GPU up:

[ 2598.025126] radeon 0000:01:00.0: ring 3 stalled for more than 10025msec
[ 2598.025135] radeon 0000:01:00.0: GPU lockup (current fence id
0x000000000005d84c last fence id 0x000000000005d84d on ring 3)

after `export R600_DEBUG=nosb` the game seems to work fine here (played first
level for a few minutes).