net/mlx4_en: Resolve dividing by zero in 32-bit system

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When doing roundup_pow_of_two for large enough number with
bit 31, an overflow will occur and a value equal to 1 will
be returned. In this case 1 will be subtracted from the return
value and division by zero will be reached.

Fixes: 31c128b66e ("net/mlx4_en: Choose time-stamping shift value according to HW frequency")
Signed-off-by: Eugenia Emantayev <eugenia@mellanox.com>
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Eugenia Emantayev 2016-10-27 16:27:16 +03:00 • committed by David S. Miller

parent 72da2e911f

commit 4850cf4581

1 changed files with 4 additions and 1 deletions

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drivers/net/ethernet/mellanox/mlx4/en_clock.c

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