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SubjectRe: [PATCH] dma: of-dma: Fix "'nbcells' may be used uninitialized" warning
On 05/20/2013 09:17 PM, Fabio Estevam wrote:
> Rearrange the code a bit so that we can get rid of the following build warning:
>
> drivers/dma/of-dma.c:83:15: warning: 'nbcells' may be used uninitialized in this function [-Wuninitialized]
>
> Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>

Hi,

I've submitted a patch a couple of weeks ago which removes nbcells
altogether. See: https://patchwork.kernel.org/patch/2470601/

- Lars

> ---
> drivers/dma/of-dma.c | 20 ++++++++++++--------
> 1 file changed, 12 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/dma/of-dma.c b/drivers/dma/of-dma.c
> index 7aa0864..107e820 100644
> --- a/drivers/dma/of-dma.c
> +++ b/drivers/dma/of-dma.c
> @@ -77,15 +77,14 @@ int of_dma_controller_register(struct device_node *np,
> return -ENOMEM;
>
> prop = of_get_property(np, "#dma-cells", NULL);
> - if (prop)
> - nbcells = be32_to_cpup(prop);
> + if (!prop)
> + goto free;
> +
> + nbcells = be32_to_cpup(prop);
>
> - if (!prop || !nbcells) {
> - pr_err("%s: #dma-cells property is missing or invalid\n",
> - __func__);
> - kfree(ofdma);
> - return -EINVAL;
> - }
> +
> + if (!nbcells)
> + goto free;
>
> ofdma->of_node = np;
> ofdma->of_dma_nbcells = nbcells;
> @@ -98,6 +97,11 @@ int of_dma_controller_register(struct device_node *np,
> mutex_unlock(&of_dma_lock);
>
> return 0;
> +
> +free:
> + pr_err("%s: #dma-cells property is missing or invalid\n", __func__);
> + kfree(ofdma);
> + return -EINVAL;
> }
> EXPORT_SYMBOL_GPL(of_dma_controller_register);
>



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