From: Guenter Roeck <linux@roeck-us.net>
To: Tianyi Jing <jingfelix@hust.edu.cn>
Cc: Jean Delvare <jdelvare@suse.com>,
Dongliang Mu <dzm91@hust.edu.cn>,
linux-hwmon@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2] drivers: hwmon: fix ioremap and memremap leak
Date: Tue, 21 Mar 2023 07:52:51 -0700 [thread overview]
Message-ID: <668f31bc-79af-4100-997e-089ed359985a@roeck-us.net> (raw)
In-Reply-To: <20230318143851.2191625-1-jingfelix@hust.edu.cn>
On Sat, Mar 18, 2023 at 10:38:51PM +0800, Tianyi Jing wrote:
> Smatch reports:
>
> drivers/hwmon/xgene-hwmon.c:757 xgene_hwmon_probe() warn:
> 'ctx->pcc_comm_addr' from ioremap() not released on line: 757.
>
> This is because in drivers/hwmon/xgene-hwmon.c:701 xgene_hwmon_probe(),
> ioremap and memremap is not released, which may cause a leak.
>
> To fix this, ioremap and memremap is modified to devm_ioremap and
> devm_memremap.
>
> Signed-off-by: Tianyi Jing <jingfelix@hust.edu.cn>
> Reviewed-by: Dongliang Mu <dzm91@hust.edu.cn>
Applied. Note that I updated the subject and changed formatting a bit.
Guenter
> ---
> v1 -> v2: use devm_ioremap and devm_memremap instead.
> drivers/hwmon/xgene-hwmon.c | 6 ++++--
> 1 file changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/hwmon/xgene-hwmon.c b/drivers/hwmon/xgene-hwmon.c
> index 5cde837bfd09..a25fae9b19b7 100644
> --- a/drivers/hwmon/xgene-hwmon.c
> +++ b/drivers/hwmon/xgene-hwmon.c
> @@ -698,11 +698,13 @@ static int xgene_hwmon_probe(struct platform_device *pdev)
> ctx->comm_base_addr = pcc_chan->shmem_base_addr;
> if (ctx->comm_base_addr) {
> if (version == XGENE_HWMON_V2)
> - ctx->pcc_comm_addr = (void __force *)ioremap(
> + ctx->pcc_comm_addr = (void __force *)devm_ioremap(
> + &pdev->dev,
> ctx->comm_base_addr,
> pcc_chan->shmem_size);
> else
> - ctx->pcc_comm_addr = memremap(
> + ctx->pcc_comm_addr = devm_memremap(
> + &pdev->dev,
> ctx->comm_base_addr,
> pcc_chan->shmem_size,
> MEMREMAP_WB);
prev parent reply other threads:[~2023-03-21 14:52 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-18 14:38 [PATCH v2] drivers: hwmon: fix ioremap and memremap leak Tianyi Jing
2023-03-21 14:52 ` Guenter Roeck [this message]
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