linux-kernel - Re: [PATCH] ARM: socfpga: add missing put_device() call in socfpga_setup_ocram_self

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Date:   Wed, 24 Jun 2020 16:47:41 +0800
From:   "yukuai (C)" <yukuai3@...wei.com>
To:     <dinguyen@...nel.org>, <linux@...linux.org.uk>,
        <khilman@...aro.org>, <atull@...nsource.altera.com>
CC:     <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ARM: socfpga: add missing put_device() call in
 socfpga_setup_ocram_self_refresh()

ping?

On 2020/6/4 21:10, yu kuai wrote:
> if of_find_device_by_node() succeed, socfpga_setup_ocram_self_refresh()
> doesn't have a corresponding put_device(). Thus add a jump target to fix
> the exception handling for this function implementation.
> 
> Fixes: 44fd8c7d4005 ("ARM: socfpga: support suspend to ram")
> Signed-off-by: yu kuai <yukuai3@...wei.com>
> ---
>   arch/arm/mach-socfpga/pm.c | 11 ++++++++---
>   1 file changed, 8 insertions(+), 3 deletions(-)
> 
> diff --git a/arch/arm/mach-socfpga/pm.c b/arch/arm/mach-socfpga/pm.c
> index 6ed887cf8dc9..7267f5da15a4 100644
> --- a/arch/arm/mach-socfpga/pm.c
> +++ b/arch/arm/mach-socfpga/pm.c
> @@ -49,14 +49,14 @@ static int socfpga_setup_ocram_self_refresh(void)
>   	if (!ocram_pool) {
>   		pr_warn("%s: ocram pool unavailable!\n", __func__);
>   		ret = -ENODEV;
> -		goto put_node;
> +		goto put_device;
>   	}
>   
>   	ocram_base = gen_pool_alloc(ocram_pool, socfpga_sdram_self_refresh_sz);
>   	if (!ocram_base) {
>   		pr_warn("%s: unable to alloc ocram!\n", __func__);
>   		ret = -ENOMEM;
> -		goto put_node;
> +		goto put_device;
>   	}
>   
>   	ocram_pbase = gen_pool_virt_to_phys(ocram_pool, ocram_base);
> @@ -67,7 +67,7 @@ static int socfpga_setup_ocram_self_refresh(void)
>   	if (!suspend_ocram_base) {
>   		pr_warn("%s: __arm_ioremap_exec failed!\n", __func__);
>   		ret = -ENOMEM;
> -		goto put_node;
> +		goto put_device;
>   	}
>   
>   	/* Copy the code that puts DDR in self refresh to ocram */
> @@ -80,7 +80,12 @@ static int socfpga_setup_ocram_self_refresh(void)
>   	     "could not copy function to ocram");
>   	if (!socfpga_sdram_self_refresh_in_ocram)
>   		ret = -EFAULT;
> +
> +	if (!ret)
> +		goto put_node;
>   
> +put_device:
> +	put_device(&pdev->dev);
>   put_node:
>   	of_node_put(np);
>   
>