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path: root/drivers/uio/uio_dmem_genirq.c
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Diffstat (limited to 'drivers/uio/uio_dmem_genirq.c')
-rw-r--r--drivers/uio/uio_dmem_genirq.c12
1 files changed, 6 insertions, 6 deletions
diff --git a/drivers/uio/uio_dmem_genirq.c b/drivers/uio/uio_dmem_genirq.c
index 7be8d0421cae..bbdf92559e3f 100644
--- a/drivers/uio/uio_dmem_genirq.c
+++ b/drivers/uio/uio_dmem_genirq.c
@@ -62,8 +62,6 @@ static int uio_dmem_genirq_open(struct uio_info *info, struct inode *inode)
(dma_addr_t *)&uiomem->addr, GFP_KERNEL);
if (!addr) {
uiomem->addr = DMEM_MAP_ERROR;
- ret = -ENOMEM;
- break;
}
priv->dmem_region_vaddr[dmem_region++] = addr;
++uiomem;
@@ -93,11 +91,13 @@ static int uio_dmem_genirq_release(struct uio_info *info, struct inode *inode)
while (!priv->refcnt && uiomem < &priv->uioinfo->mem[MAX_UIO_MAPS]) {
if (!uiomem->size)
break;
-
- dma_free_coherent(&priv->pdev->dev, uiomem->size,
- priv->dmem_region_vaddr[dmem_region++],
- uiomem->addr);
+ if (priv->dmem_region_vaddr[dmem_region]) {
+ dma_free_coherent(&priv->pdev->dev, uiomem->size,
+ priv->dmem_region_vaddr[dmem_region],
+ uiomem->addr);
+ }
uiomem->addr = DMEM_MAP_ERROR;
+ ++dmem_region;
++uiomem;
}