| Message ID | 20190319211621.3466443-1-arnd@arndb.de |
|---|---|
| State | Accepted |
| Delegated to: | David Miller |
| Headers | show |
| Series | 3c515: fix integer overflow warning | expand |
From: Arnd Bergmann <arnd@arndb.de> Date: Tue, 19 Mar 2019 22:15:58 +0100 > clang points out a harmless signed integer overflow: > > drivers/net/ethernet/3com/3c515.c:1530:66: error: implicit conversion from 'int' to 'short' changes value from 32783 to -32753 [-Werror,-Wconstant-conversion] > new_mode = SetRxFilter | RxStation | RxMulticast | RxBroadcast | RxProm; > ~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~ > drivers/net/ethernet/3com/3c515.c:1532:52: error: implicit conversion from 'int' to 'short' changes value from 32775 to -32761 [-Werror,-Wconstant-conversion] > new_mode = SetRxFilter | RxStation | RxMulticast | RxBroadcast; > ~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~ > drivers/net/ethernet/3com/3c515.c:1534:38: error: implicit conversion from 'int' to 'short' changes value from 32773 to -32763 [-Werror,-Wconstant-conversion] > new_mode = SetRxFilter | RxStation | RxBroadcast; > ~ ~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~ > > Make the variable unsigned to avoid the overflow. > > Fixes: Linux-2.1.128pre1 > Signed-off-by: Arnd Bergmann <arnd@arndb.de> Applied.
diff --git a/drivers/net/ethernet/3com/3c515.c b/drivers/net/ethernet/3com/3c515.c index 808abb6b3671..b15752267c8d 100644 --- a/drivers/net/ethernet/3com/3c515.c +++ b/drivers/net/ethernet/3com/3c515.c @@ -1521,7 +1521,7 @@ static void update_stats(int ioaddr, struct net_device *dev) static void set_rx_mode(struct net_device *dev) { int ioaddr = dev->base_addr; - short new_mode; + unsigned short new_mode; if (dev->flags & IFF_PROMISC) { if (corkscrew_debug > 3)
clang points out a harmless signed integer overflow: drivers/net/ethernet/3com/3c515.c:1530:66: error: implicit conversion from 'int' to 'short' changes value from 32783 to -32753 [-Werror,-Wconstant-conversion] new_mode = SetRxFilter | RxStation | RxMulticast | RxBroadcast | RxProm; ~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~ drivers/net/ethernet/3com/3c515.c:1532:52: error: implicit conversion from 'int' to 'short' changes value from 32775 to -32761 [-Werror,-Wconstant-conversion] new_mode = SetRxFilter | RxStation | RxMulticast | RxBroadcast; ~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~ drivers/net/ethernet/3com/3c515.c:1534:38: error: implicit conversion from 'int' to 'short' changes value from 32773 to -32763 [-Werror,-Wconstant-conversion] new_mode = SetRxFilter | RxStation | RxBroadcast; ~ ~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~ Make the variable unsigned to avoid the overflow. Fixes: Linux-2.1.128pre1 Signed-off-by: Arnd Bergmann <arnd@arndb.de> --- drivers/net/ethernet/3com/3c515.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)