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Groups > linux.kernel > #1584184
| From | Majd Dibbiny <majd@mellanox.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH 07/29] IB/mlx4: Split a condition check in handle_slaves_guid_change() |
| Date | 2017-02-19 18:10 +0100 |
| Message-ID | <tcD9M-1CL-19@gated-at.bofh.it> (permalink) |
| References | <tcD9M-1CL-21@gated-at.bofh.it> <tckgO-6HX-19@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
> On Feb 18, 2017, at 10:55 PM, SF Markus Elfring <elfring@users.sourceforge.net> wrote:
>
> From: Markus Elfring <elfring@users.sourceforge.net>
> Date: Fri, 17 Feb 2017 21:41:25 +0100
>
> The kfree() function was called in up to two cases by the
> handle_slaves_guid_change() function during error handling even if
> the passed variable contained a null pointer.
>
> * Split a condition check for memory allocation failures.
>
> * Adjust jump targets according to the Linux coding style convention.
>
> * Delete an initialisation for these variables at the beginning
> which became unnecessary with this refactoring.
>
> Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
> ---
> drivers/infiniband/hw/mlx4/mad.c | 14 +++++++++-----
> 1 file changed, 9 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/infiniband/hw/mlx4/mad.c b/drivers/infiniband/hw/mlx4/mad.c
> index cf33efce69d2..75b6522b3a8f 100644
> --- a/drivers/infiniband/hw/mlx4/mad.c
> +++ b/drivers/infiniband/hw/mlx4/mad.c
> @@ -1128,17 +1128,20 @@ static void propagate_pkey_ev(struct mlx4_ib_dev *dev, int port_num,
> static void handle_slaves_guid_change(struct mlx4_ib_dev *dev, u8 port_num,
> u32 guid_tbl_blk_num, u32 change_bitmap)
> {
> - struct ib_smp *in_mad = NULL;
> - struct ib_smp *out_mad = NULL;
> + struct ib_smp *in_mad;
> + struct ib_smp *out_mad;
> u16 i;
>
> if (!mlx4_is_mfunc(dev->dev) || !mlx4_is_master(dev->dev))
> return;
>
> in_mad = kmalloc(sizeof *in_mad, GFP_KERNEL);
> + if (!in_mad)
> + return;
> +
> out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
> - if (!in_mad || !out_mad)
> - goto out;
> + if (!out_mad)
> + goto free_in_mad;
>
> guid_tbl_blk_num *= 4;
>
> @@ -1171,8 +1174,9 @@ static void handle_slaves_guid_change(struct mlx4_ib_dev *dev, u8 port_num,
> }
>
> out:
> - kfree(in_mad);
> kfree(out_mad);
> +free_in_mad:
> + kfree(in_mad);
> }
>
> void handle_port_mgmt_change_event(struct work_struct *work)
> --
> 2.11.1
>
> --
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Thanks,
Reviewed-by: Majd Dibbiny
<majd@mellanox.com>
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[PATCH 00/29] IB/mlx: Fine-tuning for several function implementations SF Markus Elfring <elfring@users.sourceforge.net> - 2017-02-18 21:50 +0100
[PATCH 04/29] IB/mlx4: Improve another size determination in alloc_pv_object() SF Markus Elfring <elfring@users.sourceforge.net> - 2017-02-18 22:00 +0100
Re: [PATCH 04/29] IB/mlx4: Improve another size determination in alloc_pv_object() Majd Dibbiny <majd@mellanox.com> - 2017-02-19 18:10 +0100
[PATCH 01/29] IB/mlx4: Use kcalloc() in mlx4_ib_alloc_pv_bufs() SF Markus Elfring <elfring@users.sourceforge.net> - 2017-02-18 22:00 +0100
Re: [PATCH 01/29] IB/mlx4: Use kcalloc() in mlx4_ib_alloc_pv_bufs() Majd Dibbiny <majd@mellanox.com> - 2017-02-19 18:10 +0100
[PATCH 09/29] IB/mlx4: Move an assignment out of a check in forward_trap() SF Markus Elfring <elfring@users.sourceforge.net> - 2017-02-18 22:00 +0100
Re: [PATCH 09/29] IB/mlx4: Move an assignment out of a check in forward_trap() Majd Dibbiny <majd@mellanox.com> - 2017-02-19 18:20 +0100
[PATCH 03/29] IB/mlx4: Improve another size determination in mlx4_ib_alloc_demux_ctx() SF Markus Elfring <elfring@users.sourceforge.net> - 2017-02-18 22:00 +0100
Re: [PATCH 03/29] IB/mlx4: Improve another size determination in mlx4_ib_alloc_demux_ctx() Majd Dibbiny <majd@mellanox.com> - 2017-02-19 18:10 +0100
[PATCH 06/29] IB/mlx4: Delete three unnecessary return statements SF Markus Elfring <elfring@users.sourceforge.net> - 2017-02-18 22:00 +0100
Re: [PATCH 06/29] IB/mlx4: Delete three unnecessary return statements Majd Dibbiny <majd@mellanox.com> - 2017-02-19 18:10 +0100
[PATCH 05/29] IB/mlx4: Fix a typo in a comment line SF Markus Elfring <elfring@users.sourceforge.net> - 2017-02-18 22:00 +0100
Re: [PATCH 05/29] IB/mlx4: Fix a typo in a comment line Majd Dibbiny <majd@mellanox.com> - 2017-02-19 18:10 +0100
[PATCH 07/29] IB/mlx4: Split a condition check in handle_slaves_guid_change() SF Markus Elfring <elfring@users.sourceforge.net> - 2017-02-18 22:00 +0100
Re: [PATCH 07/29] IB/mlx4: Split a condition check in handle_slaves_guid_change() Majd Dibbiny <majd@mellanox.com> - 2017-02-19 18:10 +0100
[PATCH 10/29] IB/mlx4: Enclose 15 expressions for the sizeof operator by parentheses SF Markus Elfring <elfring@users.sourceforge.net> - 2017-02-18 22:00 +0100
Re: [PATCH 10/29] IB/mlx4: Enclose 15 expressions for the sizeof operator by parentheses Majd Dibbiny <majd@mellanox.com> - 2017-02-19 18:30 +0100
[PATCH 15/29] IB/mlx4: Delete an unnecessary return statement in do_slave_init() SF Markus Elfring <elfring@users.sourceforge.net> - 2017-02-18 22:10 +0100
Re: [PATCH 15/29] IB/mlx4: Delete an unnecessary return statement in do_slave_init() Majd Dibbiny <majd@mellanox.com> - 2017-02-19 23:40 +0100
[PATCH 11/29] IB/mlx4: Use kmalloc_array() in three functions SF Markus Elfring <elfring@users.sourceforge.net> - 2017-02-18 22:10 +0100
Re: [PATCH 11/29] IB/mlx4: Use kmalloc_array() in three functions Majd Dibbiny <majd@mellanox.com> - 2017-02-19 18:30 +0100
[PATCH 13/29] IB/mlx4: Split a condition check in five functions SF Markus Elfring <elfring@users.sourceforge.net> - 2017-02-18 22:10 +0100
Re: [PATCH 13/29] IB/mlx4: Split a condition check in five functions Majd Dibbiny <majd@mellanox.com> - 2017-02-19 18:30 +0100
[PATCH 12/29] IB/mlx4: Enclose 17 expressions for the sizeof operator by parentheses SF Markus Elfring <elfring@users.sourceforge.net> - 2017-02-18 22:10 +0100
Re: [PATCH 12/29] IB/mlx4: Enclose 17 expressions for the sizeof operator by parentheses Majd Dibbiny <majd@mellanox.com> - 2017-02-19 18:30 +0100
[PATCH 18/29] IB/mlx4: Delete an unnecessary variable initialisation in mlx4_ib_add() SF Markus Elfring <elfring@users.sourceforge.net> - 2017-02-18 22:10 +0100
[PATCH 19/29] IB/mlx4: Delete an unnecessary variable assignment in mlx4_ib_add() SF Markus Elfring <elfring@users.sourceforge.net> - 2017-02-18 22:10 +0100
Re: [PATCH 19/29] IB/mlx4: Delete an unnecessary variable assignment in mlx4_ib_add() Majd Dibbiny <majd@mellanox.com> - 2017-02-19 20:50 +0100
[PATCH 14/29] IB/mlx4: Delete an unnecessary variable in __mlx4_ib_query_gid() SF Markus Elfring <elfring@users.sourceforge.net> - 2017-02-18 22:10 +0100
[PATCH 17/29] IB/mlx4: Improve another size determination in mlx4_ib_add() SF Markus Elfring <elfring@users.sourceforge.net> - 2017-02-18 22:10 +0100
Re: [PATCH 17/29] IB/mlx4: Improve another size determination in mlx4_ib_add() Majd Dibbiny <majd@mellanox.com> - 2017-02-19 18:40 +0100
Re: [PATCH 17/29] IB/mlx4: Improve another size determination in mlx4_ib_add() Majd Dibbiny <majd@mellanox.com> - 2017-02-19 18:40 +0100
[PATCH 22/29] IB/mlx4: Use kmalloc_array() in alloc_proxy_bufs() SF Markus Elfring <elfring@users.sourceforge.net> - 2017-02-18 22:20 +0100
Re: [PATCH 22/29] IB/mlx4: Use kmalloc_array() in alloc_proxy_bufs() Majd Dibbiny <majd@mellanox.com> - 2017-02-19 21:00 +0100
[PATCH 20/29] IB/mlx4: Delete an error message for a failed memory allocation in mlx4_ib_add() SF Markus Elfring <elfring@users.sourceforge.net> - 2017-02-18 22:20 +0100
Re: [PATCH 20/29] IB/mlx4: Delete an error message for a failed memory allocation in mlx4_ib_add() Majd Dibbiny <majd@mellanox.com> - 2017-02-19 20:50 +0100
[PATCH 21/29] IB/mlx4: Delete unnecessary braces in mlx4_ib_add() SF Markus Elfring <elfring@users.sourceforge.net> - 2017-02-18 22:20 +0100
Re: [PATCH 21/29] IB/mlx4: Delete unnecessary braces in mlx4_ib_add() Majd Dibbiny <majd@mellanox.com> - 2017-02-19 21:10 +0100
[PATCH 29/29] IB/mlx5: Use kmalloc_array() in create_srq_kernel() SF Markus Elfring <elfring@users.sourceforge.net> - 2017-02-18 22:20 +0100
[PATCH 24/29] IB/mlx4: Delete unwanted spaces behind usages of the sizeof operator SF Markus Elfring <elfring@users.sourceforge.net> - 2017-02-18 22:20 +0100
[PATCH 28/29] IB/mlx5: Less function calls in create_kernel_qp() after error detection SF Markus Elfring <elfring@users.sourceforge.net> - 2017-02-18 22:20 +0100
[PATCH 27/29] IB/mlx5: Use kmalloc_array() in create_kernel_qp() SF Markus Elfring <elfring@users.sourceforge.net> - 2017-02-18 22:20 +0100
[PATCH 23/29] IB/mlx4: Improve size determinations in create_qp_common() SF Markus Elfring <elfring@users.sourceforge.net> - 2017-02-18 22:20 +0100
Re: [PATCH 23/29] IB/mlx4: Improve size determinations in create_qp_common() Majd Dibbiny <majd@mellanox.com> - 2017-02-19 21:00 +0100
[PATCH 16/29] IB/mlx4: Improve another size determination in do_slave_init() SF Markus Elfring <elfring@users.sourceforge.net> - 2017-02-18 22:20 +0100
[PATCH 08/29] IB/mlx4: Delete an unnecessary check before the function call "kfree" in free_pv_object() SF Markus Elfring <elfring@users.sourceforge.net> - 2017-02-18 22:30 +0100
Re: [PATCH 08/29] IB/mlx4: Delete an unnecessary check before the function call "kfree" in free_pv_object() Majd Dibbiny <majd@mellanox.com> - 2017-02-19 18:20 +0100
[PATCH 26/29] IB/mlx4: Enclose 14 expressions for the sizeof operator by parentheses SF Markus Elfring <elfring@users.sourceforge.net> - 2017-02-18 22:30 +0100
[PATCH 25/29] IB/mlx4: Add spaces for better code readability SF Markus Elfring <elfring@users.sourceforge.net> - 2017-02-18 22:50 +0100
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