From: Finn Thain <fthain@telegraphics.com.au>
Date: Mon, 25 Jun 2018 11:46:11 +0000 (+1000)
Subject: nubus: Set default dma mask for nubus_board devices
X-Git-Tag: v4.19-rc1~218^2~12
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=a8c5cb994341d4af6d75286fcb66684e53295135;p=thirdparty%2Fkernel%2Flinux.git

nubus: Set default dma mask for nubus_board devices

A 32-bit mask is used by default because a NuBus slot has 32
address/data lines and a NuBus board is free to use all of them.

Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Tested-by: Stan Johnson <userm57@yahoo.com>
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
---

diff --git a/drivers/nubus/bus.c b/drivers/nubus/bus.c
index a59b6c4bb5b89..ad3d17c42e23c 100644
--- a/drivers/nubus/bus.c
+++ b/drivers/nubus/bus.c
@@ -5,6 +5,7 @@
 // Copyright (C) 2017 Finn Thain
 
 #include <linux/device.h>
+#include <linux/dma-mapping.h>
 #include <linux/list.h>
 #include <linux/nubus.h>
 #include <linux/seq_file.h>
@@ -93,6 +94,8 @@ int nubus_device_register(struct nubus_board *board)
 	board->dev.release = nubus_device_release;
 	board->dev.bus = &nubus_bus_type;
 	dev_set_name(&board->dev, "slot.%X", board->slot);
+	board->dev.dma_mask = &board->dev.coherent_dma_mask;
+	dma_set_mask(&board->dev, DMA_BIT_MASK(32));
 	return device_register(&board->dev);
 }