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Date:   Mon, 29 Apr 2019 12:29:10 -0700
From:   Jakub Kicinski <>
To:     Moshe Shemesh <>
Cc:     "David S. Miller" <>,
        Jiri Pirko <>,
        Saeed Mahameed <>,,
Subject: Re: [PATCH net-next] devlink: Change devlink health locking

On Mon, 29 Apr 2019 12:41:45 +0300, Moshe Shemesh wrote:
> The devlink health reporters create/destroy and user commands currently
> use the devlink->lock as a locking mechanism. Different reporters have
> different rules in the driver and are being created/destroyed during
> different stages of driver load/unload/running. So during execution of a
> reporter recover the flow can go through another reporter's destroy and
> create. Such flow leads to deadlock trying to lock a mutex already
> held.
> With the new locking mechanism the different reporters share mutex lock
> only to protect access to shared reporters list.
> Added refcount per reporter, to protect the reporters from destroy while
> being used.
> Signed-off-by: Moshe Shemesh <>

Acked-by: Jakub Kicinski <>


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