Nouveau - Jul 2016 - [PATCH] ibus/gk20a: use udelay() in interrupt context

gk20a_ibus_init_ibus_ring() can be called from gk20a_ibus_intr(), in
non-interruptible context. Replace use of usleep_range() with udelay().

Reported-by: Thierry Reding <treding at nvidia.com>
Signed-off-by: Alexandre Courbot <acourbot at nvidia.com>
---
 drm/nouveau/nvkm/subdev/ibus/gk20a.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drm/nouveau/nvkm/subdev/ibus/gk20a.c
b/drm/nouveau/nvkm/subdev/ibus/gk20a.c
index b7159b3..1a4ab82 100644
--- a/drm/nouveau/nvkm/subdev/ibus/gk20a.c
+++ b/drm/nouveau/nvkm/subdev/ibus/gk20a.c
@@ -29,7 +29,7 @@ gk20a_ibus_init_ibus_ring(struct nvkm_subdev *ibus)
 	nvkm_mask(device, 0x137250, 0x3f, 0);
 
 	nvkm_mask(device, 0x000200, 0x20, 0);
-	usleep_range(20, 30);
+	udelay(20);
 	nvkm_mask(device, 0x000200, 0x20, 0x20);
 
 	nvkm_wr32(device, 0x12004c, 0x4);
-- 
2.9.0