[PATCH -next] remoteproc: imx_rproc: fix return value check in imx_rproc_addr_init()

[Bjorn Andersson]

On Fri 12 Mar 02:04 CST 2021, 'Wei Yongjun wrote:

> From: Wei Yongjun <weiyongjun1 at huawei.com>
> 
> In case of error, the function devm_ioremap() returns NULL pointer
> not ERR_PTR(). The IS_ERR() test in the return value check should
> be replaced with NULL test.
> 
> Fixes: ecadcc47492c ("remoteproc: imx_rproc: use devm_ioremap")
> Reported-by: Hulk Robot <hulkci at huawei.com>
> Signed-off-by: Wei Yongjun <weiyongjun1 at huawei.com>
> ---
>  drivers/remoteproc/imx_rproc.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c
> index 5ebb9f57d3e0..3ba4b6ba47aa 100644
> --- a/drivers/remoteproc/imx_rproc.c
> +++ b/drivers/remoteproc/imx_rproc.c
> @@ -464,9 +464,9 @@ static int imx_rproc_addr_init(struct imx_rproc *priv,
>  
>  		/* Not use resource version, because we might share region */
>  		priv->mem[b].cpu_addr = devm_ioremap(&pdev->dev, res.start, resource_size(&res));
> -		if (IS_ERR(priv->mem[b].cpu_addr)) {
> +		if (!priv->mem[b].cpu_addr) {
>  			dev_err(dev, "failed to remap %pr\n", &res);
> -			err = PTR_ERR(priv->mem[b].cpu_addr);
> +			err = -ENOMEM;
>  			return err;

Took the liberty of changing this to return -ENOMEM, as I applied the
patch.

Thank you,
Bjorn

>  		}
>  		priv->mem[b].sys_addr = res.start;
>