[PATCH 2/3] ibmveth: Return correct error codes

From: Amitoj Kaur Chawla
Date: Thu Feb 04 2016 - 08:56:13 EST


The return value of kmalloc and kcalloc on failure of allocation of
memory should be -ENOMEM and not -1.

Found using Coccinelle. A simplified version of the semantic patch
used is:

//<smpl>
@@
expression *e;
position p,q;
@@

e@q = \(kmalloc\|kcalloc\)(...);
if@p (e == NULL) {
...
return
- -1
+ -ENOMEM
;
}
//</smpl>

The two call sites only check that the return value is not 0,
hence no change is required at the call sites.

Signed-off-by: Amitoj Kaur Chawla <amitoj1606@xxxxxxxxx>
---
drivers/net/ethernet/ibm/ibmveth.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/ibm/ibmveth.c b/drivers/net/ethernet/ibm/ibmveth.c
index 7af870a..92a9a70 100644
--- a/drivers/net/ethernet/ibm/ibmveth.c
+++ b/drivers/net/ethernet/ibm/ibmveth.c
@@ -167,13 +167,13 @@ static int ibmveth_alloc_buffer_pool(struct ibmveth_buff_pool *pool)
pool->free_map = kmalloc(sizeof(u16) * pool->size, GFP_KERNEL);

if (!pool->free_map)
- return -1;
+ return -ENOMEM;

pool->dma_addr = kmalloc(sizeof(dma_addr_t) * pool->size, GFP_KERNEL);
if (!pool->dma_addr) {
kfree(pool->free_map);
pool->free_map = NULL;
- return -1;
+ return -ENOMEM;
}

pool->skbuff = kcalloc(pool->size, sizeof(void *), GFP_KERNEL);
@@ -184,7 +184,7 @@ static int ibmveth_alloc_buffer_pool(struct ibmveth_buff_pool *pool)

kfree(pool->free_map);
pool->free_map = NULL;
- return -1;
+ return -ENOMEM;
}

memset(pool->dma_addr, 0, sizeof(dma_addr_t) * pool->size);
--
1.9.1