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IB/mlx4: avoid a -Wmaybe-uninitialize warning

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There is an old warning about mlx4_SW2HW_EQ_wrapper on x86:

ethernet/mellanox/mlx4/resource_tracker.c: In function ‘mlx4_SW2HW_EQ_wrapper’:
ethernet/mellanox/mlx4/resource_tracker.c:3071:10: error: ‘eq’ may be used uninitialized in this function [-Werror=maybe-uninitialized]

The problem here is that gcc won't track the state of the variable
across a spin_unlock. Moving the assignment out of the lock is
safe here and avoids the warning.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Arnd Bergmann 2016-10-25 18:16:20 +02:00 committed by David S. Miller
parent ae148b0858
commit a4256bc9ec
1 changed files with 3 additions and 2 deletions
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5
drivers/net/ethernet/mellanox/mlx4/resource_tracker.c
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@ -1605,13 +1605,14 @@ static int eq_res_start_move_to(struct mlx4_dev *dev, int slave, int index,
r->com.from_state = r->com.state;
r->com.to_state = state;
r->com.state = RES_EQ_BUSY;
if (eq)
*eq = r;
}
}
spin_unlock_irq(mlx4_tlock(dev));
if (!err && eq)
*eq = r;
return err;
}