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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: 2ac9cfe ("net/mlx5e: IPSec, Add Innova IPSec offload TX data path")
Reported-by: kbuild test robot <[email protected]>
Signed-off-by: Ilan Tayari <[email protected]>
Signed-off-by: Saeed Mahameed <[email protected]>
ilantayari authored and Saeed Mahameed committed Jul 6, 2017
1 parent aa07b63 commit 5dfd87b
Showing 1 changed file with 3 additions and 1 deletion.
Original file line number Diff line number Diff line change
@@ -363,6 +363,7 @@ void mlx5e_ipsec_build_inverse_table(void)
{
u16 mss_inv;
u32 mss;
u64 n;

/* Calculate 1/x inverse table for use in GSO data path.
* 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);
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);
}
}

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