Messages in this thread | | | Date | Fri, 6 Aug 2021 10:38:45 +0300 | From | Dan Carpenter <> | Subject | drivers/net/ethernet/mellanox/mlx5/core/en_main.c:339 mlx5e_get_mpwqe_offset() warn: should '(wqe_ix * ((((((((((1))) << (((18 - 12 > 0) ?18 - 12:0))) + 1)) + (((8)) - 1)) & ~(((8)) - 1))))) << 12' be a 64 bit type? |
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tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 902e7f373fff2476b53824264c12e4e76c7ec02a commit: d5dd03b26ba49c4ffe67ee1937add82293c19794 net/mlx5e: RX, Mind the MPWQE gaps when calculating offsets config: i386-randconfig-m021-20210804 (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@intel.com> Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
smatch warnings: drivers/net/ethernet/mellanox/mlx5/core/en_main.c:339 mlx5e_get_mpwqe_offset() warn: should '(wqe_ix * ((((((((((1))) << (((18 - 12 > 0) ?18 - 12:0))) + 1)) + (((8)) - 1)) & ~(((8)) - 1))))) << 12' be a 64 bit type?
vim +339 drivers/net/ethernet/mellanox/mlx5/core/en_main.c
d5dd03b26ba49c Tariq Toukan 2021-01-12 337 static u64 mlx5e_get_mpwqe_offset(u16 wqe_ix) b8a98a4cf3221d Tariq Toukan 2017-12-20 338 { d5dd03b26ba49c Tariq Toukan 2021-01-12 @339 return MLX5E_REQUIRED_MTTS(wqe_ix) << PAGE_SHIFT;
This function returns u64 but only the lower 32 bits can be set.
b8a98a4cf3221d Tariq Toukan 2017-12-20 340 }
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