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Re: [PATCH] nvmem: core: Prevent memory leak when device is unregistered

From Andrey Smirnov <andrew.smirnov@gmail.com>
Newsgroups linux.kernel
Subject Re: [PATCH] nvmem: core: Prevent memory leak when device is unregistered
Date 2017-05-16 23:40 +0200
Message-ID <tHSme-2zE-19@gated-at.bofh.it> (permalink)
References <tHmcG-7ob-19@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On Mon, May 15, 2017 at 4:13 AM, Mika Westerberg
<mika.westerberg@linux.intel.com> wrote:
> The nvmem_unregister() calls device_del() for the device but forgets to
> call put_device() to actually release the device object which causes
> that memory to be leaked.
>
> Fix this by calling device_unregister() for the device intead which also
> calls put_device() for the device releasing it eventually.
>
> Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
> ---

FWIW, I submitted similar fix for this here:

lkml.kernel.org/r/20170418142454.23921-2-andrew.smirnov@gmail.com

>  drivers/nvmem/core.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c
> index 8c830a80a648..112c8072e0f3 100644
> --- a/drivers/nvmem/core.c
> +++ b/drivers/nvmem/core.c
> @@ -528,7 +528,7 @@ int nvmem_unregister(struct nvmem_device *nvmem)
>                 device_remove_bin_file(nvmem->base_dev, &nvmem->eeprom);
>
>         nvmem_device_remove_all_cells(nvmem);
> -       device_del(&nvmem->dev);
> +       device_unregister(&nvmem->dev);
>
>         return 0;
>  }
> --
> 2.11.0
>

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Thread

[PATCH] nvmem: core: Prevent memory leak when device is unregistered Mika Westerberg <mika.westerberg@linux.intel.com> - 2017-05-15 13:20 +0200
  Re: [PATCH] nvmem: core: Prevent memory leak when device is unregistered Andy Shevchenko <andy.shevchenko@gmail.com> - 2017-05-15 14:50 +0200
  Re: [PATCH] nvmem: core: Prevent memory leak when device is  unregistered Johan Hovold <johan@kernel.org> - 2017-05-16 15:50 +0200
  Re: [PATCH] nvmem: core: Prevent memory leak when device is unregistered Andrey Smirnov <andrew.smirnov@gmail.com> - 2017-05-16 23:40 +0200
    Re: [PATCH] nvmem: core: Prevent memory leak when device is  unregistered Mika Westerberg <mika.westerberg@linux.intel.com> - 2017-05-17 11:20 +0200

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