diff options
| author | Paul Burton <paul.burton@imgtec.com> | 2016-09-02 15:22:48 +0100 |
|---|---|---|
| committer | Mister Oyster <oysterized@gmail.com> | 2017-07-04 11:51:18 +0200 |
| commit | 57ef15e1ea9d590bd9e27e03c6a9397d204405a4 (patch) | |
| tree | a5004b2fa68640a6272bd68733f84a9ee36c1cfc | |
| parent | 1e5ba7fd757772fbec6143566916e92028b164b2 (diff) | |
net: ti: cpmac: Fix compiler warning due to type confusion
commit 2f5281ba2a8feaf6f0aee93356f350855bb530fc upstream.
cpmac_start_xmit() used the max() macro on skb->len (an unsigned int)
and ETH_ZLEN (a signed int literal). This led to the following compiler
warning:
In file included from include/linux/list.h:8:0,
from include/linux/module.h:9,
from drivers/net/ethernet/ti/cpmac.c:19:
drivers/net/ethernet/ti/cpmac.c: In function 'cpmac_start_xmit':
include/linux/kernel.h:748:17: warning: comparison of distinct pointer
types lacks a cast
(void) (&_max1 == &_max2); \
^
drivers/net/ethernet/ti/cpmac.c:560:8: note: in expansion of macro 'max'
len = max(skb->len, ETH_ZLEN);
^
On top of this, it assigned the result of the max() macro to a signed
integer whilst all further uses of it result in it being cast to varying
widths of unsigned integer.
Fix this up by using max_t to ensure the comparison is performed as
unsigned integers, and for consistency change the type of the len
variable to unsigned int.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Willy Tarreau <w@1wt.eu>
| -rw-r--r-- | drivers/net/ethernet/ti/cpmac.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/net/ethernet/ti/cpmac.c b/drivers/net/ethernet/ti/cpmac.c index 31bbbca34..6bcb2b8b4 100644 --- a/drivers/net/ethernet/ti/cpmac.c +++ b/drivers/net/ethernet/ti/cpmac.c @@ -557,7 +557,8 @@ fatal_error: static int cpmac_start_xmit(struct sk_buff *skb, struct net_device *dev) { - int queue, len; + int queue; + unsigned int len; struct cpmac_desc *desc; struct cpmac_priv *priv = netdev_priv(dev); @@ -567,7 +568,7 @@ static int cpmac_start_xmit(struct sk_buff *skb, struct net_device *dev) if (unlikely(skb_padto(skb, ETH_ZLEN))) return NETDEV_TX_OK; - len = max(skb->len, ETH_ZLEN); + len = max_t(unsigned int, skb->len, ETH_ZLEN); queue = skb_get_queue_mapping(skb); netif_stop_subqueue(dev, queue); |