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SubjectRe: [PATCH net 1/3] net: mvpp2: Fix clk error path in mvpp2_probe
Date
Hi Maxime,

On mer., avril 25 2018, Maxime Chevallier <maxime.chevallier@bootlin.com> wrote:

> When clk_prepare_enable fails for the axi_clk, the mg_clk isn't properly
> cleaned up. Add another jump label to handle that case, and make sure we
> jump to it in the later error cases.
>
> Fixes: 4792ea04bcd0 ("net: mvpp2: Fix clock resource by adding an optional bus clock")
> Signed-off-by: Maxime Chevallier <maxime.chevallier@bootlin.com>

Acked-by: Gregory CLEMENT <gregory.clement@bootlin.com>

Thanks,

Gregory

> ---
> drivers/net/ethernet/marvell/mvpp2.c | 15 ++++++++-------
> 1 file changed, 8 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/net/ethernet/marvell/mvpp2.c b/drivers/net/ethernet/marvell/mvpp2.c
> index 4202f9b5b966..0c2f04813d42 100644
> --- a/drivers/net/ethernet/marvell/mvpp2.c
> +++ b/drivers/net/ethernet/marvell/mvpp2.c
> @@ -8774,12 +8774,12 @@ static int mvpp2_probe(struct platform_device *pdev)
> if (IS_ERR(priv->axi_clk)) {
> err = PTR_ERR(priv->axi_clk);
> if (err == -EPROBE_DEFER)
> - goto err_gop_clk;
> + goto err_mg_clk;
> priv->axi_clk = NULL;
> } else {
> err = clk_prepare_enable(priv->axi_clk);
> if (err < 0)
> - goto err_gop_clk;
> + goto err_mg_clk;
> }
>
> /* Get system's tclk rate */
> @@ -8793,7 +8793,7 @@ static int mvpp2_probe(struct platform_device *pdev)
> if (priv->hw_version == MVPP22) {
> err = dma_set_mask(&pdev->dev, MVPP2_DESC_DMA_MASK);
> if (err)
> - goto err_mg_clk;
> + goto err_axi_clk;
> /* Sadly, the BM pools all share the same register to
> * store the high 32 bits of their address. So they
> * must all have the same high 32 bits, which forces
> @@ -8801,14 +8801,14 @@ static int mvpp2_probe(struct platform_device *pdev)
> */
> err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
> if (err)
> - goto err_mg_clk;
> + goto err_axi_clk;
> }
>
> /* Initialize network controller */
> err = mvpp2_init(pdev, priv);
> if (err < 0) {
> dev_err(&pdev->dev, "failed to initialize controller\n");
> - goto err_mg_clk;
> + goto err_axi_clk;
> }
>
> /* Initialize ports */
> @@ -8821,7 +8821,7 @@ static int mvpp2_probe(struct platform_device *pdev)
> if (priv->port_count == 0) {
> dev_err(&pdev->dev, "no ports enabled\n");
> err = -ENODEV;
> - goto err_mg_clk;
> + goto err_axi_clk;
> }
>
> /* Statistics must be gathered regularly because some of them (like
> @@ -8849,8 +8849,9 @@ static int mvpp2_probe(struct platform_device *pdev)
> mvpp2_port_remove(priv->port_list[i]);
> i++;
> }
> -err_mg_clk:
> +err_axi_clk:
> clk_disable_unprepare(priv->axi_clk);
> +err_mg_clk:
> if (priv->hw_version == MVPP22)
> clk_disable_unprepare(priv->mg_clk);
> err_gop_clk:
> --
> 2.11.0
>

--
Gregory Clement, Bootlin (formerly Free Electrons)
Embedded Linux and Kernel engineering
http://bootlin.com

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