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path: root/drivers/uio
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Diffstat (limited to 'drivers/uio')
-rw-r--r--drivers/uio/uio_dmem_genirq.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/uio/uio_dmem_genirq.c b/drivers/uio/uio_dmem_genirq.c
index d8bbe0783cdc..7be8d0421cae 100644
--- a/drivers/uio/uio_dmem_genirq.c
+++ b/drivers/uio/uio_dmem_genirq.c
@@ -29,6 +29,7 @@
#include <linux/of_address.h>
#define DRIVER_NAME "uio_dmem_genirq"
+#define DMEM_MAP_ERROR (~0)
struct uio_dmem_genirq_platdata {
struct uio_info *uioinfo;
@@ -60,6 +61,7 @@ static int uio_dmem_genirq_open(struct uio_info *info, struct inode *inode)
addr = dma_alloc_coherent(&priv->pdev->dev, uiomem->size,
(dma_addr_t *)&uiomem->addr, GFP_KERNEL);
if (!addr) {
+ uiomem->addr = DMEM_MAP_ERROR;
ret = -ENOMEM;
break;
}
@@ -95,7 +97,7 @@ static int uio_dmem_genirq_release(struct uio_info *info, struct inode *inode)
dma_free_coherent(&priv->pdev->dev, uiomem->size,
priv->dmem_region_vaddr[dmem_region++],
uiomem->addr);
- uiomem->addr = DMA_ERROR_CODE;
+ uiomem->addr = DMEM_MAP_ERROR;
++uiomem;
}
@@ -238,7 +240,7 @@ static int uio_dmem_genirq_probe(struct platform_device *pdev)
break;
}
uiomem->memtype = UIO_MEM_PHYS;
- uiomem->addr = DMA_ERROR_CODE;
+ uiomem->addr = DMEM_MAP_ERROR;
uiomem->size = pdata->dynamic_region_sizes[i];
++uiomem;
}