linux-kernel - RE: [PATCH 5/5] retmoteproc: imx_dsp_rproc: Call of_node

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Date:   Tue, 21 Mar 2023 03:34:39 +0000
From:   "S.J. Wang" <shengjiu.wang@....com>
To:     Mathieu Poirier <mathieu.poirier@...aro.org>,
        "andersson@...nel.org" <andersson@...nel.org>
CC:     "shawnguo@...nel.org" <shawnguo@...nel.org>,
        "s.hauer@...gutronix.de" <s.hauer@...gutronix.de>,
        "kernel@...gutronix.de" <kernel@...gutronix.de>,
        "festevam@...il.com" <festevam@...il.com>,
        dl-linux-imx <linux-imx@....com>,
        "patrice.chotard@...s.st.com" <patrice.chotard@...s.st.com>,
        "mcoquelin.stm32@...il.com" <mcoquelin.stm32@...il.com>,
        "alexandre.torgue@...s.st.com" <alexandre.torgue@...s.st.com>,
        "arnaud.pouliquen@...com" <arnaud.pouliquen@...com>,
        Hongxing Zhu <hongxing.zhu@....com>,
        Peng Fan <peng.fan@....com>,
        "linux-remoteproc@...r.kernel.org" <linux-remoteproc@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH 5/5] retmoteproc: imx_dsp_rproc: Call of_node_put() on
 iteration error

> 
> Function of_phandle_iterator_next() calls of_node_put() on the last
> device_node it iterated over, but when the loop exits prematurely it has to
> be called explicitly.
> 
> Fixes: ec0e5549f358 ("remoteproc: imx_dsp_rproc: Add remoteproc driver
> for DSP on i.MX")
> Cc: stable@...r.kernel.org
> Signed-off-by: Mathieu Poirier <mathieu.poirier@...aro.org>

Acked-by: Shengjiu Wang <shengjiu.wang@...il.com>

Best regards
Wang Shengjiu
> ---
>  drivers/remoteproc/imx_dsp_rproc.c | 12 +++++++++---
>  1 file changed, 9 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/remoteproc/imx_dsp_rproc.c
> b/drivers/remoteproc/imx_dsp_rproc.c
> index b8f268d41773..21759d9e5b7b 100644
> --- a/drivers/remoteproc/imx_dsp_rproc.c
> +++ b/drivers/remoteproc/imx_dsp_rproc.c
> @@ -650,15 +650,19 @@ static int imx_dsp_rproc_add_carveout(struct
> imx_dsp_rproc *priv)
> 
>                 rmem = of_reserved_mem_lookup(it.node);
>                 if (!rmem) {
> +                       of_node_put(it.node);
>                         dev_err(dev, "unable to acquire memory-region\n");
>                         return -EINVAL;
>                 }
> 
> -               if (imx_dsp_rproc_sys_to_da(priv, rmem->base, rmem->size, &da))
> +               if (imx_dsp_rproc_sys_to_da(priv, rmem->base, rmem->size, &da))
> {
> +                       of_node_put(it.node);
>                         return -EINVAL;
> +               }
> 
>                 cpu_addr = devm_ioremap_wc(dev, rmem->base, rmem->size);
>                 if (!cpu_addr) {
> +                       of_node_put(it.node);
>                         dev_err(dev, "failed to map memory %p\n", &rmem->base);
>                         return -ENOMEM;
>                 }
> @@ -667,10 +671,12 @@ static int imx_dsp_rproc_add_carveout(struct
> imx_dsp_rproc *priv)
>                 mem = rproc_mem_entry_init(dev, (void __force *)cpu_addr,
> (dma_addr_t)rmem->base,
>                                            rmem->size, da, NULL, NULL, it.node->name);
> 
> -               if (mem)
> +               if (mem) {
>                         rproc_coredump_add_segment(rproc, da, rmem->size);
> -               else
> +               } else {
> +                       of_node_put(it.node);
>                         return -ENOMEM;
> +               }
> 
>                 rproc_add_carveout(rproc, mem);
>         }
> --
> 2.25.1