[Intel-gfx] [regression] drm/i915: Simplify most HAS_BSD() checks

[Alexey Fisher]

this time double checked ;)

Netbook freeze on suspend. After "echo mem > /sys/power/state" suspend
will be initiated bat freeze with blackscreen and cursor on top left
corner. I can't access it per ssh.

My HW: Eeepc 1005HA, 945GME
intel_stepping
Vendor: 0x8086, Device: 0x27ae, Revision: 0x03 (??)

apt-cache policy xserver-xorg-video-intel
xserver-xorg-video-intel:
  Installiert: 2:2.12.0-1ubuntu5
  Kandidat:    2:2.12.0-1ubuntu5
  Versionstabelle:
 *** 2:2.12.0-1ubuntu5 0
        500 http://de.archive.ubuntu.com/ubuntu/ maverick/main i386
Packages
        100 /var/lib/dpkg/status


Commit with regression:
commit 87acb0a550694ff1a7725ea3a73b80d8ccf56180
Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Tue Oct 19 10:13:00 2010 +0100

    drm/i915: Simplify most HAS_BSD() checks
    
    ... by always initialising the empty ringbuffer it is always then
safe
    to check whether it is active.
    
    Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>