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authorDamian Hobson-Garcia <dhobsong@igel.co.jp>2012-11-16 09:46:09 +0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-11-22 01:44:10 +0400
commit24fce61b0b7f1bc94970036db1f1d65b0770d168 (patch)
treef782abab57d4152c60e44cd54679d311518c2f8b /drivers/uio/uio_dmem_genirq.c
parent9b96c3124b66a959ba061dbca339944a81686cd2 (diff)
downloadlinux-24fce61b0b7f1bc94970036db1f1d65b0770d168.tar.xz
drivers: uio_dmem_genirq: Don't mix address spaces for dynamic region vaddr
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.wu@intel.com> Signed-off-by: Damian Hobson-Garcia <dhobsong@igel.co.jp> Cc: "Hans J. Koch" <hjk@hansjkoch.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/uio/uio_dmem_genirq.c')
-rw-r--r--drivers/uio/uio_dmem_genirq.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/uio/uio_dmem_genirq.c b/drivers/uio/uio_dmem_genirq.c
index 4d4dd008c8b9..d8bbe0783cdc 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;
}