netdev - Re: [PATCH rdma-next v2 13/17] RDMA/core: Get sum value of all counters when perform a sysfs stat read

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Wed, 22 May 2019 14:26:36 -0300
From:   Jason Gunthorpe <jgg@...pe.ca>
To:     Leon Romanovsky <leon@...nel.org>
Cc:     Doug Ledford <dledford@...hat.com>,
        Leon Romanovsky <leonro@...lanox.com>,
        RDMA mailing list <linux-rdma@...r.kernel.org>,
        Majd Dibbiny <majd@...lanox.com>,
        Mark Zhang <markz@...lanox.com>,
        Saeed Mahameed <saeedm@...lanox.com>,
        linux-netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH rdma-next v2 13/17] RDMA/core: Get sum value of all
 counters when perform a sysfs stat read

On Mon, Apr 29, 2019 at 11:34:49AM +0300, Leon Romanovsky wrote:
> diff --git a/drivers/infiniband/core/device.c b/drivers/infiniband/core/device.c
> index c56ffc61ab1e..8ae4906a60e7 100644
> +++ b/drivers/infiniband/core/device.c
> @@ -1255,7 +1255,11 @@ int ib_register_device(struct ib_device *device, const char *name)
>  		goto dev_cleanup;
>  	}
>  
> -	rdma_counter_init(device);
> +	ret = rdma_counter_init(device);
> +	if (ret) {
> +		dev_warn(&device->dev, "Couldn't initialize counter\n");
> +		goto sysfs_cleanup;
> +	}

Don't put this things randomly, if there is some reason it should be
after sysfs it needs a comment, otherwise if it is just allocating
memory it belongs earlier, and the unwind should be done in release.

I also think it is very strange/wrong that both sysfs and counters are
allocating the same alloc_hw_stats object

Why can't they share?

Jason