linux-kernel - Re: [PATCH 3/3] spi: switch to devm_spi_alloc

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Date:	Fri, 31 Jan 2014 09:18:21 -0700
From:	Stephen Warren <swarren@...dotorg.org>
To:	Maxime Ripard <maxime.ripard@...e-electrons.com>,
	Mark Brown <broonie@...nel.org>
CC:	linux-spi@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/3] spi: switch to devm_spi_alloc_master

On 01/31/2014 03:23 AM, Maxime Ripard wrote:
> Make the existing users of devm_spi_register_master use the
> devm_spi_alloc_master function to avoid leaking memory.

> diff --git a/drivers/spi/spi-tegra114.c b/drivers/spi/spi-tegra114.c

> @@ -1087,14 +1085,13 @@ static int tegra_spi_probe(struct platform_device *pdev)
>  	if (ret < 0) {
>  		dev_err(&pdev->dev, "Failed to register ISR for IRQ %d\n",
>  					tspi->irq);
> -		goto exit_free_master;
> +		return ret;
>  	}
>  
>  	tspi->clk = devm_clk_get(&pdev->dev, "spi");
>  	if (IS_ERR(tspi->clk)) {
>  		dev_err(&pdev->dev, "can not get clock\n");
> -		ret = PTR_ERR(tspi->clk);
> -		goto exit_free_irq;
> +		return PTR_ERR(tspi->clk);
>  	}
>  
>  	tspi->max_buf_size = SPI_FIFO_DEPTH << 2;
> @@ -1152,8 +1149,6 @@ exit_rx_dma_free:
>  	tegra_spi_deinit_dma_param(tspi, true);
>  exit_free_irq:
>  	free_irq(spi_irq, tspi);
> -exit_free_master:
> -	spi_master_put(master);
>  	return ret;

Doesn't that s/goto exit_free_irq/return/ leak spi_irq? It's only OK to
replace goto free_master with a direct return.

The other two Tegra drivers don't seem to have this problem.
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