[PATCH 3/3] net: mvpp2: Return correct error codes

[Amitoj Kaur Chawla]

The return value of kzalloc 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 = kzalloc(...);
if@p (e == NULL) {
...
return
- -1
+ -ENOMEM
;
}
//</smpl>

This function may also return -1 after calling mpp2_prs_tcam_port_map_get.
So that the function consistently returns meaningful error values on 
failure, the -1 is changed to -EINVAL.

Signed-off-by: Amitoj Kaur Chawla <amitoj1...@gmail.com>
---
 drivers/net/ethernet/marvell/mvpp2.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/marvell/mvpp2.c 
b/drivers/net/ethernet/marvell/mvpp2.c
index d9884fd..3208787 100644
--- a/drivers/net/ethernet/marvell/mvpp2.c
+++ b/drivers/net/ethernet/marvell/mvpp2.c
@@ -3061,7 +3061,7 @@ static int mvpp2_prs_mac_da_accept(struct mvpp2 *priv, 
int port,
 
                pe = kzalloc(sizeof(*pe), GFP_KERNEL);
                if (!pe)
-                       return -1;
+                       return -ENOMEM;
                mvpp2_prs_tcam_lu_set(pe, MVPP2_PRS_LU_MAC);
                pe->index = tid;
 
@@ -3077,7 +3077,7 @@ static int mvpp2_prs_mac_da_accept(struct mvpp2 *priv, 
int port,
        if (pmap == 0) {
                if (add) {
                        kfree(pe);
-                       return -1;
+                       return -EINVAL;
                }
                mvpp2_prs_hw_inv(priv, pe->index);
                priv->prs_shadow[pe->index].valid = false;
-- 
1.9.1