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net/mlx4: Avoid 'may be used uninitialized' warnings

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With a cross-compiler based on gcc-4.9, I see warnings like the following:

  drivers/net/ethernet/mellanox/mlx4/resource_tracker.c: In function 'mlx4_SW2HW_CQ_wrapper':
  drivers/net/ethernet/mellanox/mlx4/resource_tracker.c:3048:10: error: 'cq' may be used uninitialized in this function [-Werror=maybe-uninitialized]
    cq->mtt = mtt;

I think the warning is spurious because we only use cq when
cq_res_start_move_to() returns zero, and it always initializes *cq in that
case.  The srq case is similar.  But maybe gcc isn't smart enough to figure
that out.

Initialize cq and srq explicitly to avoid the warnings.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Bjorn Helgaas 2015-05-14 18:17:08 -05:00 committed by David S. Miller
parent e87a468eb9
commit c1c52db16e
1 changed files with 4 additions and 4 deletions
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8
drivers/net/ethernet/mellanox/mlx4/resource_tracker.c
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@ -3187,7 +3187,7 @@ int mlx4_SW2HW_CQ_wrapper(struct mlx4_dev *dev, int slave,
int cqn = vhcr->in_modifier;
struct mlx4_cq_context *cqc = inbox->buf;
int mtt_base = cq_get_mtt_addr(cqc) / dev->caps.mtt_entry_sz;
struct res_cq *cq;
struct res_cq *cq = NULL;
struct res_mtt *mtt;
err = cq_res_start_move_to(dev, slave, cqn, RES_CQ_HW, &cq);
@ -3223,7 +3223,7 @@ int mlx4_HW2SW_CQ_wrapper(struct mlx4_dev *dev, int slave,
{
int err;
int cqn = vhcr->in_modifier;
struct res_cq *cq;
struct res_cq *cq = NULL;
err = cq_res_start_move_to(dev, slave, cqn, RES_CQ_ALLOCATED, &cq);
if (err)
@ -3362,7 +3362,7 @@ int mlx4_SW2HW_SRQ_wrapper(struct mlx4_dev *dev, int slave,
int err;
int srqn = vhcr->in_modifier;
struct res_mtt *mtt;
struct res_srq *srq;
struct res_srq *srq = NULL;
struct mlx4_srq_context *srqc = inbox->buf;
int mtt_base = srq_get_mtt_addr(srqc) / dev->caps.mtt_entry_sz;
@ -3406,7 +3406,7 @@ int mlx4_HW2SW_SRQ_wrapper(struct mlx4_dev *dev, int slave,
{
int err;
int srqn = vhcr->in_modifier;
struct res_srq *srq;
struct res_srq *srq = NULL;
err = srq_res_start_move_to(dev, slave, srqn, RES_SRQ_ALLOCATED, &srq);
if (err)