nouveau/gsp: use correct size for registry rpc.

commit 61712c9 upstream.

Timur pointed this out before, and it just slipped my mind,
but this might help some things work better, around pcie power
management.

Cc: <[email protected]> # v6.7
Fixes: 8d55b0a ("nouveau/gsp: add some basic registry entries.")
Signed-off-by: Dave Airlie <[email protected]>
Signed-off-by: Danilo Krummrich <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

drivers/gpu/drm/nouveau/nvkm/subdev/gsp/r535.c

@@ -1111,7 +1111,6 @@ r535_gsp_rpc_set_registry(struct nvkm_gsp *gsp)
 	if (IS_ERR(rpc))
 		return PTR_ERR(rpc);
 
-	rpc->size = sizeof(*rpc);
 	rpc->numEntries = NV_GSP_REG_NUM_ENTRIES;
 
 	str_offset = offsetof(typeof(*rpc), entries[NV_GSP_REG_NUM_ENTRIES]);
@@ -1127,6 +1126,7 @@ r535_gsp_rpc_set_registry(struct nvkm_gsp *gsp)
 		strings += name_len;
 		str_offset += name_len;
 	}
+	rpc->size = str_offset;
 
 	return nvkm_gsp_rpc_wr(gsp, rpc, false);
 }