linux-kernel - Re: [PATCH] rpmsg: core: Clean up resources on announce

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Date:   Mon, 6 Dec 2021 13:26:31 -0600
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Arnaud Pouliquen <arnaud.pouliquen@...s.st.com>
Cc:     Mathieu Poirier <mathieu.poirier@...aro.org>,
        linux-remoteproc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-stm32@...md-mailman.stormreply.com
Subject: Re: [PATCH] rpmsg: core: Clean up resources on announce_create
 failure.

On Mon 06 Dec 13:07 CST 2021, Arnaud Pouliquen wrote:

> During the rpmsg_dev_probe, if rpdev->ops->announce_create returns an
> error, the rpmsg device and default endpoint should be freed before
> exiting the function.
> 
> Fixes: 5e619b48677c ("rpmsg: Split rpmsg core and virtio backend")
> Suggested-by: Bjorn Andersson <bjorn.andersson@...aro.org>
> Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@...s.st.com>

Reviewed-by: Bjorn Andersson <bjorn.andersson@...aro.org>

Thanks,
Bjorn

> ---
>  drivers/rpmsg/rpmsg_core.c | 20 ++++++++++++++++----
>  1 file changed, 16 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/rpmsg/rpmsg_core.c b/drivers/rpmsg/rpmsg_core.c
> index 27aad6baf7c5..12d7b7c6e5f9 100644
> --- a/drivers/rpmsg/rpmsg_core.c
> +++ b/drivers/rpmsg/rpmsg_core.c
> @@ -612,13 +612,25 @@ static int rpmsg_dev_probe(struct device *dev)
>  	err = rpdrv->probe(rpdev);
>  	if (err) {
>  		dev_err(dev, "%s: failed: %d\n", __func__, err);
> -		if (ept)
> -			rpmsg_destroy_ept(ept);
> -		goto out;
> +		goto destroy_ept;
>  	}
>  
> -	if (ept && rpdev->ops->announce_create)
> +	if (ept && rpdev->ops->announce_create) {
>  		err = rpdev->ops->announce_create(rpdev);
> +		if (err) {
> +			dev_err(dev, "failed to announce creation\n");
> +			goto remove_rpdev;
> +		}
> +	}
> +
> +	return 0;
> +
> +remove_rpdev:
> +	if (rpdrv->remove)
> +		rpdrv->remove(rpdev);
> +destroy_ept:
> +	if (ept)
> +		rpmsg_destroy_ept(ept);
>  out:
>  	return err;
>  }
> -- 
> 2.17.1
>