tree 6b557861889b009555ba1faf7da22131dd306f57
parent 79eee7aa0d4de5a42331c63d3c7c735248b53d0c
author Ben Skeggs <bskeggs@redhat.com> 1348701223 +1000
committer Ben Skeggs <bskeggs@redhat.com> 1348701223 +1000

drm/nvc0/fifo: ignore bits in PFIFO_INTR that aren't set in PFIFO_INTR_EN

PFIFO_INTR = 0x40000000 appears to be a normal case on nvc0/nve0 PFIFO,
the binary driver appears to completely ignore it in its PFIFO interrupt
handler and even masks off the bit (as we do) in PFIFO_INTR_EN at init
time.

The bits still light up in the hardware sometimes though, so lets just
ignore any bits we haven't explicitely requested.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>