From: Leon Romanovsky <leon@leon.nu>
To: Insu Yun <wuninsu@gmail.com>
Cc: faisal.latif@intel.com, dledford@redhat.com,
sean.hefty@intel.com, hal.rosenstock@gmail.com,
linux-rdma@vger.kernel.org, linux-kernel@vger.kernel.org,
taesoo@gatech.edu, yeongjin.jang@gatech.edu, insu@gatech.edu,
changwoo@gatech.edu
Subject: Re: [PATCH] nes: handling failed allocation when creating workqueue
Date: Thu, 18 Feb 2016 06:59:05 +0200 [thread overview]
Message-ID: <20160218045905.GF30450@leon.nu> (raw)
In-Reply-To: <1455732393-11029-1-git-send-email-wuninsu@gmail.com>
Please see my minor comments below.
Reviewed-by: Leon Romanovsky <leon@leon.nu>
On Wed, Feb 17, 2016 at 01:06:33PM -0500, Insu Yun wrote:
> Since create_singlethread_workqueue uses kzalloc internally,
> it can be failed in memory pressure, so need to handle it.
s/can be failed/can fail/
>
> Signed-off-by: Insu Yun <wuninsu@gmail.com>
> ---
> drivers/infiniband/hw/nes/nes_cm.c | 13 ++++++++++++-
> 1 file changed, 12 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/infiniband/hw/nes/nes_cm.c b/drivers/infiniband/hw/nes/nes_cm.c
> index cb9f0f2..23afad6 100644
> --- a/drivers/infiniband/hw/nes/nes_cm.c
> +++ b/drivers/infiniband/hw/nes/nes_cm.c
> @@ -2833,7 +2833,7 @@ static struct nes_cm_core *nes_cm_alloc_core(void)
> /* alloc top level core control structure */
> cm_core = kzalloc(sizeof(*cm_core), GFP_KERNEL);
> if (!cm_core)
> - return NULL;
> + goto enomem_3;
IMHO, there is no need to define goto label for one return.
>
> INIT_LIST_HEAD(&cm_core->connected_nodes);
> init_timer(&cm_core->tcp_timer);
> @@ -2856,12 +2856,23 @@ static struct nes_cm_core *nes_cm_alloc_core(void)
>
> nes_debug(NES_DBG_CM, "Enable QUEUE EVENTS\n");
> cm_core->event_wq = create_singlethread_workqueue("nesewq");
> + if (!cm_core->event_wq)
> + goto enomem_2;
> cm_core->post_event = nes_cm_post_event;
> nes_debug(NES_DBG_CM, "Enable QUEUE DISCONNECTS\n");
> cm_core->disconn_wq = create_singlethread_workqueue("nesdwq");
> + if (!cm_core->disconn_wq)
> + goto enomem_1;
>
> print_core(cm_core);
> return cm_core;
> +
> +enomem_1:
> + destroy_workqueue(cm_core->event_wq);
> +enomem_2:
> + kfree(cm_core);
> +enomem_3:
> + return NULL;
> }
>
>
> --
> 1.9.1
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-rdma" in
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> More majordomo info at http://vger.kernel.org/majordomo-info.html
next prev parent reply other threads:[~2016-02-18 5:06 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-17 18:06 [PATCH] nes: handling failed allocation when creating workqueue Insu Yun
2016-02-18 4:59 ` Leon Romanovsky [this message]
2016-02-18 17:45 ` Doug Ledford
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