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drm/nouveau/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@nvidia.com> Signed-off-by: Alexandre Courbot <acourbot@nvidia.com> Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
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@ -29,7 +29,7 @@ gk20a_ibus_init_ibus_ring(struct nvkm_subdev *ibus)
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nvkm_mask(device, 0x137250, 0x3f, 0);
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nvkm_mask(device, 0x000200, 0x20, 0);
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usleep_range(20, 30);
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udelay(20);
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nvkm_mask(device, 0x000200, 0x20, 0x20);
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nvkm_wr32(device, 0x12004c, 0x4);
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