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Subject[PATCH] staging: kpc2000: fix alloc_cast.cocci warnings
From: kbuild test robot <>

drivers/staging/kpc2000/kpc_dma/fileops.c:60:8-26: WARNING: casting value returned by memory allocation function to (struct aio_cb_data *) is useless.

Remove casting the values returned by memory allocation functions
like kmalloc, kzalloc, kmem_cache_alloc, kmem_cache_zalloc etc.

Semantic patch information:
This makes an effort to find cases of casting of values returned by
kmalloc, kzalloc, kcalloc, kmem_cache_alloc, kmem_cache_zalloc,
kmem_cache_alloc_node, kmalloc_node and kzalloc_node and removes
the casting as it is not required. The result in the patch case may
need some reformatting.

Generated by: scripts/coccinelle/api/alloc/alloc_cast.cocci

Fixes: 7df95299b94a ("staging: kpc2000: Add DMA driver")
CC: Matt Sickler <>
Signed-off-by: kbuild test robot <>

tree: master
head: 5ac94332248ee017964ba368cdda4ce647e3aba7
commit: 7df95299b94a63ec67a6389fc02dc25019a80ee8 staging: kpc2000: Add DMA driver

fileops.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/staging/kpc2000/kpc_dma/fileops.c
+++ b/drivers/staging/kpc2000/kpc_dma/fileops.c
@@ -57,7 +57,7 @@ int kpc_dma_transfer(struct dev_private

dev_dbg(&priv->ldev->pldev->dev, "kpc_dma_transfer(priv = [%p], kcb = [%p], iov_base = [%p], iov_len = %ld) ldev = [%p]\n", priv, kcb, (void*)iov_base, iov_len, ldev);

- acd = (struct aio_cb_data *) kzalloc(sizeof(struct aio_cb_data), GFP_KERNEL);
+ acd = kzalloc(sizeof(struct aio_cb_data), GFP_KERNEL);
if (!acd){
dev_err(&priv->ldev->pldev->dev, "Couldn't kmalloc space for for the aio data\n");
return -ENOMEM;
 \ /
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