netdev - Re: Why hasn't the patch "r8152: Fix a deadlock by doubly PM resume" back ported to stable branches?

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Message-ID: <2025102742-mumbling-starlit-c651@gregkh>
Date: Mon, 27 Oct 2025 07:45:13 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: Heyi Guo <guoheyi@...ux.alibaba.com>
Cc: linux-usb@...r.kernel.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	"David S. Miller" <davem@...emloft.net>,
	Jakub Kicinski <kuba@...nel.org>, Takashi Iwai <tiwai@...e.de>
Subject: Re: Why hasn't the patch "r8152: Fix a deadlock by doubly PM resume"
 back ported to stable branches?

On Mon, Oct 27, 2025 at 02:04:09PM +0800, Heyi Guo wrote:
> Hi all,
> 
> We found that below bug fix patch had not been back ported to stable
> branches, like linux-5.10.y. Is there any special reason?
> 
> commit 776ac63a986d211286230c4fd70f85390eabedcd
> Author:     Takashi Iwai <tiwai@...e.de>
> AuthorDate: Wed Jul 14 19:00:22 2021 +0200
> Commit:     David S. Miller <davem@...emloft.net>
> CommitDate: Wed Jul 14 14:57:55 2021 -0700
> 
>     r8152: Fix a deadlock by doubly PM resume
> 
>     r8152 driver sets up the MAC address at reset-resume, while
>     rtl8152_set_mac_address() has the temporary autopm get/put. This may
>     lead to a deadlock as the PM lock has been already taken for the
>     execution of the runtime PM callback.
> 
>     This patch adds the workaround to avoid the superfluous autpm when
>     called from rtl8152_reset_resume().
> 
>     Link: https://bugzilla.suse.com/show_bug.cgi?id=1186194
>     Signed-off-by: Takashi Iwai <tiwai@...e.de>
>     Signed-off-by: David S. Miller <davem@...emloft.net>

Because it was not marked to be backported at all.  If you feel it
should be, please send a tested version to stable@...r.kernel.org for
inclusion.

thanks,

greg k-h