[stable] Regression in 2.6.32.2: radeon KMS hangs system

[Johannes Hirte]

With 2.6.32.2 the system hangs completely with black screen when modprobing 
radeon with modeset=1. I was able to connect via ssh, but after entering the 
password nothing happend. I didn't got a prompt. Only SysRq worked. I've 
tracked it down to the following patch: