diff --git a/drivers/gpu/drm/nouveau/Kconfig b/drivers/gpu/drm/nouveau/Kconfig
index 9c990266e876..ce03693698ef 100644
--- a/drivers/gpu/drm/nouveau/Kconfig
+++ b/drivers/gpu/drm/nouveau/Kconfig
@@ -2,6 +2,7 @@
 config DRM_NOUVEAU
 	tristate "Nouveau (NVIDIA) cards"
 	depends on DRM && PCI && MMU
+	select IOMMU_API
 	select FW_LOADER
 	select DRM_KMS_HELPER
 	select DRM_TTM
diff --git a/drivers/gpu/drm/nouveau/dispnv04/arb.c b/drivers/gpu/drm/nouveau/dispnv04/arb.c
index f607a04d262d..9d4a2d97507e 100644
--- a/drivers/gpu/drm/nouveau/dispnv04/arb.c
+++ b/drivers/gpu/drm/nouveau/dispnv04/arb.c
@@ -53,7 +53,7 @@ struct nv_sim_state {
 static void
 nv04_calc_arb(struct nv_fifo_info *fifo, struct nv_sim_state *arb)
 {
-	int pagemiss, cas, width, bpp;
+	int pagemiss, cas, bpp;
 	int nvclks, mclks, crtpagemiss;
 	int found, mclk_extra, mclk_loop, cbs, m1, p1;
 	int mclk_freq, pclk_freq, nvclk_freq;
@@ -65,7 +65,6 @@ nv04_calc_arb(struct nv_fifo_info *fifo, struct nv_sim_state *arb)
 	nvclk_freq = arb->nvclk_khz;
 	pagemiss = arb->mem_page_miss;
 	cas = arb->mem_latency;
-	width = arb->memory_width >> 6;
 	bpp = arb->bpp;
 	cbs = 128;
 
diff --git a/drivers/gpu/drm/nouveau/dispnv50/disp.c b/drivers/gpu/drm/nouveau/dispnv50/disp.c
index 5fabe2b88eca..a82b354e5a8c 100644
--- a/drivers/gpu/drm/nouveau/dispnv50/disp.c
+++ b/drivers/gpu/drm/nouveau/dispnv50/disp.c
@@ -1669,7 +1669,6 @@ nv50_pior_enable(struct drm_encoder *encoder)
 {
 	struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
 	struct nouveau_crtc *nv_crtc = nouveau_crtc(encoder->crtc);
-	struct nouveau_connector *nv_connector;
 	struct nv50_head_atom *asyh = nv50_head_atom(nv_crtc->base.state);
 	struct nv50_core *core = nv50_disp(encoder->dev)->core;
 	u8 owner = 1 << nv_crtc->index;
@@ -1677,7 +1676,6 @@ nv50_pior_enable(struct drm_encoder *encoder)
 
 	nv50_outp_acquire(nv_encoder);
 
-	nv_connector = nouveau_encoder_connector_get(nv_encoder);
 	switch (asyh->or.bpc) {
 	case 10: asyh->or.depth = 0x6; break;
 	case  8: asyh->or.depth = 0x5; break;
diff --git a/drivers/gpu/drm/nouveau/nvkm/core/memory.c b/drivers/gpu/drm/nouveau/nvkm/core/memory.c
index e85a08ecd9da..4cc186262d34 100644
--- a/drivers/gpu/drm/nouveau/nvkm/core/memory.c
+++ b/drivers/gpu/drm/nouveau/nvkm/core/memory.c
@@ -91,8 +91,8 @@ nvkm_memory_tags_get(struct nvkm_memory *memory, struct nvkm_device *device,
 	}
 
 	refcount_set(&tags->refcount, 1);
+	*ptags = memory->tags = tags;
 	mutex_unlock(&fb->subdev.mutex);
-	*ptags = tags;
 	return 0;
 }
 
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/gr/gf100.h b/drivers/gpu/drm/nouveau/nvkm/engine/gr/gf100.h
index 4c67b254c413..88bcb57c2e07 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/gr/gf100.h
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/gr/gf100.h
@@ -238,6 +238,7 @@ void gp100_gr_init_fecs_exceptions(struct gf100_gr *);
 void gp100_gr_init_shader_exceptions(struct gf100_gr *, int, int);
 void gp100_gr_zbc_clear_color(struct gf100_gr *, int);
 void gp100_gr_zbc_clear_depth(struct gf100_gr *, int);
+extern const struct gf100_gr_func_zbc gp100_gr_zbc;
 
 void gp102_gr_init_swdx_pes_mask(struct gf100_gr *);
 extern const struct gf100_gr_func_zbc gp102_gr_zbc;
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/gr/gp100.c b/drivers/gpu/drm/nouveau/nvkm/engine/gr/gp100.c
index bd5d8cc66987..33c8634ae567 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/gr/gp100.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/gr/gp100.c
@@ -62,7 +62,7 @@ gp100_gr_zbc_clear_depth(struct gf100_gr *gr, int zbc)
 			  gr->zbc_depth[zbc].format << ((znum % 4) * 7));
 }
 
-static const struct gf100_gr_func_zbc
+const struct gf100_gr_func_zbc
 gp100_gr_zbc = {
 	.clear_color = gp100_gr_zbc_clear_color,
 	.clear_depth = gp100_gr_zbc_clear_depth,
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/gr/gp10b.c b/drivers/gpu/drm/nouveau/nvkm/engine/gr/gp10b.c
index a3db2a95ff9a..eaf913eb5aa3 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/gr/gp10b.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/gr/gp10b.c
@@ -60,8 +60,8 @@ gp10b_gr = {
 	.gpc_nr = 1,
 	.tpc_nr = 2,
 	.ppc_nr = 1,
-	.grctx = &gp102_grctx,
-	.zbc = &gp102_gr_zbc,
+	.grctx = &gp100_grctx,
+	.zbc = &gp100_gr_zbc,
 	.sclass = {
 		{ -1, -1, FERMI_TWOD_A },
 		{ -1, -1, KEPLER_INLINE_TO_MEMORY_B },
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/pmu/gm20b.c b/drivers/gpu/drm/nouveau/nvkm/subdev/pmu/gm20b.c
index 6d5a13e4a857..82571032a07d 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/pmu/gm20b.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/pmu/gm20b.c
@@ -52,8 +52,13 @@ gm20b_pmu_acr_bootstrap_falcon(struct nvkm_falcon *falcon,
 	ret = nvkm_falcon_cmdq_send(pmu->hpq, &cmd.cmd.hdr,
 				    gm20b_pmu_acr_bootstrap_falcon_cb,
 				    &pmu->subdev, msecs_to_jiffies(1000));
-	if (ret >= 0 && ret != cmd.falcon_id)
-		ret = -EIO;
+	if (ret >= 0) {
+		if (ret != cmd.falcon_id)
+			ret = -EIO;
+		else
+			ret = 0;
+	}
+
 	return ret;
 }
 
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/pmu/gp10b.c b/drivers/gpu/drm/nouveau/nvkm/subdev/pmu/gp10b.c
index 39c86bc56310..5b81c7320479 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/pmu/gp10b.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/pmu/gp10b.c
@@ -52,8 +52,13 @@ gp10b_pmu_acr_bootstrap_multiple_falcons(struct nvkm_falcon *falcon, u32 mask)
 	ret = nvkm_falcon_cmdq_send(pmu->hpq, &cmd.cmd.hdr,
 				    gp10b_pmu_acr_bootstrap_multiple_falcons_cb,
 				    &pmu->subdev, msecs_to_jiffies(1000));
-	if (ret >= 0 && ret != cmd.falcon_mask)
-		ret = -EIO;
+	if (ret >= 0) {
+		if (ret != cmd.falcon_mask)
+			ret = -EIO;
+		else
+			ret = 0;
+	}
+
 	return ret;
 }