On 09/01/2018 06:49 AM, Christoph Hellwig wrote:
This keeps the historic default behavior for devices without a DMA mask,
but removes the warning about a lacking DMA mask for doing DMA without
a mask.
Reported-by: Meelis Roos <mroos@xxxxxxxx>
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Tested-by: Guenter Roeck <linux@xxxxxxxxxxxx>
---
Had to redo this because the platform_device patch that the previous
version dependend on had to be dropped.
arch/sparc/kernel/of_device_32.c | 4 ++++
arch/sparc/kernel/of_device_64.c | 3 +++
2 files changed, 7 insertions(+)
diff --git a/arch/sparc/kernel/of_device_32.c b/arch/sparc/kernel/of_device_32.c
index 3641a294ed54..e4abe9b8f97a 100644
--- a/arch/sparc/kernel/of_device_32.c
+++ b/arch/sparc/kernel/of_device_32.c
@@ -9,6 +9,7 @@
#include <linux/irq.h>
#include <linux/of_device.h>
#include <linux/of_platform.h>
+#include <linux/dma-mapping.h>
#include <asm/leon.h>
#include <asm/leon_amba.h>
@@ -381,6 +382,9 @@ static struct platform_device * __init scan_one_device(struct device_node *dp,
else
dev_set_name(&op->dev, "%08x", dp->phandle);
+ op->dev.coherent_dma_mask = DMA_BIT_MASK(32);
+ op->dev.dma_mask = &op->dev.coherent_dma_mask;
+
if (of_device_register(op)) {
printk("%s: Could not register of device.\n",
dp->full_name);
diff --git a/arch/sparc/kernel/of_device_64.c b/arch/sparc/kernel/of_device_64.c
index 44e4d4435bed..6df6086968c6 100644
--- a/arch/sparc/kernel/of_device_64.c
+++ b/arch/sparc/kernel/of_device_64.c
@@ -2,6 +2,7 @@
#include <linux/string.h>
#include <linux/kernel.h>
#include <linux/of.h>
+#include <linux/dma-mapping.h>
#include <linux/init.h>
#include <linux/export.h>
#include <linux/mod_devicetable.h>
@@ -675,6 +676,8 @@ static struct platform_device * __init scan_one_device(struct device_node *dp,
dev_set_name(&op->dev, "root");
else
dev_set_name(&op->dev, "%08x", dp->phandle);
+ op->dev.coherent_dma_mask = DMA_BIT_MASK(32);
+ op->dev.dma_mask = &op->dev.coherent_dma_mask;
if (of_device_register(op)) {
printk("%s: Could not register of device.\n",
