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net/mlx5: IPSec, Fix 64-bit division on 32-bit builds

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Fix warnings when building 386 kernel:
>> ERROR: "__udivdi3" [drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.ko] undefined!

Fixes: 2ac9cfe782 ("net/mlx5e: IPSec, Add Innova IPSec offload TX data path")
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Ilan Tayari <ilant@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
This commit is contained in:
Ilan Tayari 2017-07-02 10:57:56 +03:00 • committed by Saeed Mahameed
commit 5dfd87b67c
1 changed files with 3 additions and 1 deletions
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4
drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec_rxtx.c
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@ -363,6 +363,7 @@ void mlx5e_ipsec_build_inverse_table(void)
{ {
u16 mss_inv; u16 mss_inv;
u32 mss; u32 mss;
u64 n;
/* Calculate 1/x inverse table for use in GSO data path. /* Calculate 1/x inverse table for use in GSO data path.
* Using this table, we provide the IPSec accelerator with the value of * Using this table, we provide the IPSec accelerator with the value of
@ -372,7 +373,8 @@ void mlx5e_ipsec_build_inverse_table(void)
*/ */
mlx5e_ipsec_inverse_table[1] = htons(0xFFFF); mlx5e_ipsec_inverse_table[1] = htons(0xFFFF);
for (mss = 2; mss < MAX_LSO_MSS; mss++) { for (mss = 2; mss < MAX_LSO_MSS; mss++) {
mss_inv = ((1ULL << 32) / mss) >> 16; n = 1ULL << 32;
mss_inv = do_div(n, mss) >> 16;
mlx5e_ipsec_inverse_table[mss] = htons(mss_inv); mlx5e_ipsec_inverse_table[mss] = htons(mss_inv);
} }
} }