linux-kernel - Re: [PATCH v2] media: budget-core: Improve exception handling in budget

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Date:   Sun, 14 Jun 2020 21:34:20 +0100
From:   Sean Young <sean@...s.org>
To:     Chuhong Yuan <hslester96@...il.com>
Cc:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        Markus Elfring <Markus.Elfring@....de>,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] media: budget-core: Improve exception handling in
 budget_register()

On Sat, Jun 06, 2020 at 12:17:28AM +0800, Chuhong Yuan wrote:
> budget_register() has no error handling after its failure.
> Add the missed undo functions for error handling to fix it.
> 
> Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")

Changes look good, but the Fixes: points to the first import of linux
into git. I'm not sure this is useful information so I've removed it.

Applied, thanks.

> Signed-off-by: Chuhong Yuan <hslester96@...il.com>
> ---
> Changes in v2:
>   - Modify the label of error handler.
> 
>  drivers/media/pci/ttpci/budget-core.c | 11 ++++++++---
>  1 file changed, 8 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/media/pci/ttpci/budget-core.c b/drivers/media/pci/ttpci/budget-core.c
> index fadbdeeb4495..293867b9e796 100644
> --- a/drivers/media/pci/ttpci/budget-core.c
> +++ b/drivers/media/pci/ttpci/budget-core.c
> @@ -369,20 +369,25 @@ static int budget_register(struct budget *budget)
>  	ret = dvbdemux->dmx.add_frontend(&dvbdemux->dmx, &budget->hw_frontend);
>  
>  	if (ret < 0)
> -		return ret;
> +		goto err_release_dmx;
>  
>  	budget->mem_frontend.source = DMX_MEMORY_FE;
>  	ret = dvbdemux->dmx.add_frontend(&dvbdemux->dmx, &budget->mem_frontend);
>  	if (ret < 0)
> -		return ret;
> +		goto err_release_dmx;
>  
>  	ret = dvbdemux->dmx.connect_frontend(&dvbdemux->dmx, &budget->hw_frontend);
>  	if (ret < 0)
> -		return ret;
> +		goto err_release_dmx;
>  
>  	dvb_net_init(&budget->dvb_adapter, &budget->dvb_net, &dvbdemux->dmx);
>  
>  	return 0;
> +
> +err_release_dmx:
> +	dvb_dmxdev_release(&budget->dmxdev);
> +	dvb_dmx_release(&budget->demux);
> +	return ret;
>  }
>  
>  static void budget_unregister(struct budget *budget)
> -- 
> 2.26.2