Assigning the virtual address returned from dma_alloc_coherent to the the
internal_addr element of uioinfo produces the following sparse errors since
internal_addr is a void __iomem * and dma_alloc_coherent returns void *.
+ drivers/uio/uio_dmem_genirq.c:65:39: sparse: incorrect type in assignment
(different address spaces)
drivers/uio/uio_dmem_genirq.c:65:39: expected void [noderef]
<asn:2>*internal_addr
drivers/uio/uio_dmem_genirq.c:65:39: got void *[assigned] addr
+ drivers/uio/uio_dmem_genirq.c:93:17: sparse: incorrect type in argument 3
(different address spaces)
drivers/uio/uio_dmem_genirq.c:93:17: expected void *vaddr
drivers/uio/uio_dmem_genirq.c:93:17: got void [noderef] <asn:2>*internal_addr
Store the void * in the driver's private data instead.
Reported-by: Fengguang Wu <fengguang...@intel.com>
Signed-off-by: Damian Hobson-Garcia <dhobs...@igel.co.jp>
---
drivers/uio/uio_dmem_genirq.c | 9 ++++++---
1 files changed, 6 insertions(+), 3 deletions(-)
diff --git a/drivers/uio/uio_dmem_genirq.c b/drivers/uio/uio_dmem_genirq.c
index 4d4dd00..d8bbe07 100644
--- a/drivers/uio/uio_dmem_genirq.c
+++ b/drivers/uio/uio_dmem_genirq.c
@@ -37,6 +37,7 @@ struct uio_dmem_genirq_platdata {
struct platform_device *pdev;
unsigned int dmem_region_start;
unsigned int num_dmem_regions;
+ void *dmem_region_vaddr[MAX_UIO_MAPS];
struct mutex alloc_lock;
unsigned int refcnt;
};
@@ -46,6 +47,7 @@ static int uio_dmem_genirq_open(struct uio_info *info, struct
inode *inode)
struct uio_dmem_genirq_platdata *priv = info->priv;
struct uio_mem *uiomem;
int ret = 0;
+ int dmem_region = priv->dmem_region_start;
uiomem = &priv->uioinfo->mem[priv->dmem_region_start];
@@ -61,8 +63,7 @@ static int uio_dmem_genirq_open(struct uio_info *info, struct
inode *inode)
ret = -ENOMEM;
break;
}
-
- uiomem->internal_addr = addr;
+ priv->dmem_region_vaddr[dmem_region++] = addr;
++uiomem;
}
priv->refcnt++;
@@ -77,6 +78,7 @@ static int uio_dmem_genirq_release(struct uio_info *info,
struct inode *inode)
{
struct uio_dmem_genirq_platdata *priv = info->priv;
struct uio_mem *uiomem;
+ int dmem_region = priv->dmem_region_start;
/* Tell the Runtime PM code that the device has become idle */
pm_runtime_put_sync(&priv->pdev->dev);
@@ -91,7 +93,8 @@ static int uio_dmem_genirq_release(struct uio_info *info,
struct inode *inode)
break;
dma_free_coherent(&priv->pdev->dev, uiomem->size,
- uiomem->internal_addr, uiomem->addr);
+ priv->dmem_region_vaddr[dmem_region++],
+ uiomem->addr);
uiomem->addr = DMA_ERROR_CODE;
++uiomem;
}
--
1.7.5.4
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