m68k: Set default dma mask for platform devices
This avoids a WARNING splat when loading the macsonic or macmace driver.
Please see commit 205e1b7f51e4 ("dma-mapping: warn when there is no
coherent_dma_mask").
This implementation of arch_setup_pdev_archdata() differs from the
powerpc one, in that this one avoids clobbering a device dma mask
which has already been initialized.
Cc: Christoph Hellwig <hch@lst.de>
Cc: Greg Ungerer <gerg@linux-m68k.org>
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Acked-by: Greg Ungerer <gerg@linux-m68k.org>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
diff --git a/arch/m68k/kernel/dma.c b/arch/m68k/kernel/dma.c
index c01b9b8..463572c 100644
--- a/arch/m68k/kernel/dma.c
+++ b/arch/m68k/kernel/dma.c
@@ -9,6 +9,7 @@
#include <linux/dma-mapping.h>
#include <linux/device.h>
#include <linux/kernel.h>
+#include <linux/platform_device.h>
#include <linux/scatterlist.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
@@ -165,3 +166,12 @@
.sync_sg_for_device = m68k_dma_sync_sg_for_device,
};
EXPORT_SYMBOL(m68k_dma_ops);
+
+void arch_setup_pdev_archdata(struct platform_device *pdev)
+{
+ if (pdev->dev.coherent_dma_mask == DMA_MASK_NONE &&
+ pdev->dev.dma_mask == NULL) {
+ pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
+ pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
+ }
+}
