[PATCH 1/4] 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] *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] *internal_addr Store the void * in the driver's private data instead. Reported-by: Fengguang Wu Signed-off-by: Damian Hobson-Garcia --- 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 = >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(>pdev->dev); @@ -91,7 +93,8 @@ static int uio_dmem_genirq_release(struct uio_info *info, struct inode *inode) break; dma_free_coherent(>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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
[PATCH 1/4] 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...@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 -- To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/