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drm/nouveau/fbcon/nv11-: correctly account for ring space usage 

The RING_SPACE macro accounts how much space is used up so it's
important to ask it for the right amount. Incorrect accounting of this
can cause page faults down the line as writes are attempted outside of
the ring.

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Cc: stable@vger.kernel.org
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ilia Mirkin 2015-06-29 04:07:20 -04:00 committed by Ben Skeggs
parent d31b11d858
commit d108142c08
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/nouveau/nv04_fbcon.c
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@ -203,7 +203,7 @@ nv04_fbcon_accel_init(struct fb_info *info)
if (ret)
return ret;
if (RING_SPACE(chan, 49)) {
if (RING_SPACE(chan, 49 + (device->info.chipset >= 0x11 ? 4 : 0))) {
nouveau_fbcon_gpu_lockup(info);
return 0;
}