net/mlx5: IPSec, fix 64-bit division correctly
The new IPSec offload code introduced a build error: drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec_rxtx.o: In function `mlx5e_ipsec_build_inverse_table': ipsec_rxtx.c:(.text+0x556): undefined reference Another patch was added on top to fix the build error, but that introduced a new bug, as we now use the remainder of the division rather than the result. This makes it use the correct helper function instead. Fixes:5dfd87b67c
("net/mlx5: IPSec, Fix 64-bit division on 32-bit builds") Fixes:2ac9cfe782
("net/mlx5e: IPSec, Add Innova IPSec offload TX data path") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Ilan Tayari <ilant@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -363,7 +363,6 @@ void mlx5e_ipsec_build_inverse_table(void)
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{
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u16 mss_inv;
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u32 mss;
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u64 n;
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/* Calculate 1/x inverse table for use in GSO data path.
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* Using this table, we provide the IPSec accelerator with the value of
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@ -373,8 +372,7 @@ void mlx5e_ipsec_build_inverse_table(void)
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*/
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mlx5e_ipsec_inverse_table[1] = htons(0xFFFF);
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for (mss = 2; mss < MAX_LSO_MSS; mss++) {
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n = 1ULL << 32;
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mss_inv = do_div(n, mss) >> 16;
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mss_inv = div_u64(1ULL << 32, mss) >> 16;
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mlx5e_ipsec_inverse_table[mss] = htons(mss_inv);
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}
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}
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