linux-kernel - Re: [PATCH] net: core: devlink.c: Hold devlink->lock from the beginning of devlink_dpipe_table

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Date:   Sun, 23 Feb 2020 19:17:46 +0100
From:   Jiri Pirko <jiri@...nulli.us>
To:     madhuparnabhowmik10@...il.com
Cc:     jiri@...lanox.com, davem@...emloft.net, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, joel@...lfernandes.org,
        linux-kernel-mentees@...ts.linuxfoundation.org, paulmck@...nel.org
Subject: Re: [PATCH] net: core: devlink.c: Hold devlink->lock from the
 beginning of devlink_dpipe_table_register()

Sun, Feb 23, 2020 at 12:22:33PM CET, madhuparnabhowmik10@...il.com wrote:
>From: Madhuparna Bhowmik <madhuparnabhowmik10@...il.com>
>
>devlink_dpipe_table_find() should be called under either
>rcu_read_lock() or devlink->lock. devlink_dpipe_table_register()
>calls devlink_dpipe_table_find() without holding the lock
>and acquires it later. Therefore hold the devlink->lock
>from the beginning of devlink_dpipe_table_register().
>
>Suggested-by: Jiri Pirko <jiri@...lanox.com>
>Signed-off-by: Madhuparna Bhowmik <madhuparnabhowmik10@...il.com>

Reviewed-by: Jiri Pirko <jiri@...lanox.com>