Subject: Compile-time warnings on mlx4/net-next

From: Marcelo Ricardo Leitner <[email-masked]>
Date: Thu, 15 Jan 2015 11:05:27 -0200

Hi Or,

Building net-next.git from today, 4e7a84b1a5bc8094522fd11f628b00c4b4e78b4d,
I'm seeing these warnings on mlx4:

drivers/net/ethernet/mellanox/mlx4/fw.c: In function ‘mlx4_config_dev_retrieval’:
drivers/net/ethernet/mellanox/mlx4/fw.c:2136:12: warning: ‘config_dev.rx_checksum_val’ may be used uninitialized in this function [-Wmaybe-uninitialized]
  csum_mask = (config_dev.rx_checksum_val >> CONFIG_DEV_RX_CSUM_MODE_PORT2_BIT_OFFSET) &
            ^
In file included from include/linux/swab.h:4:0,
                 from include/uapi/linux/byteorder/little_endian.h:12,
                 from include/linux/byteorder/little_endian.h:4,
                 from ./arch/x86/include/uapi/asm/byteorder.h:4,
                 from include/asm-generic/bitops/le.h:5,
                 from ./arch/x86/include/asm/bitops.h:504,
                 from include/linux/bitops.h:36,
                 from include/linux/kernel.h:10,
                 from include/linux/skbuff.h:17,
                 from include/linux/if_ether.h:23,
                 from include/linux/etherdevice.h:25,
                 from drivers/net/ethernet/mellanox/mlx4/fw.c:35:
include/uapi/linux/swab.h:106:23: warning: ‘config_dev.vxlan_udp_dport’ may be used uninitialized in this function [-Wmaybe-uninitialized]
  (__builtin_constant_p((__u16)(x)) ? \
                       ^
drivers/net/ethernet/mellanox/mlx4/fw.c:2114:25: note: ‘config_dev.vxlan_udp_dport’ was declared here
  struct mlx4_config_dev config_dev;
                         ^

Do you see them too? 

  Marcelo