linux-kernel - Re: [PATCH net v1 1/1] net: lan78xx: fix runtime PM count underflow on link stop

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Date: Fri, 01 Mar 2024 08:40:28 +0000
From: patchwork-bot+netdevbpf@...nel.org
To: Oleksij Rempel <o.rempel@...gutronix.de>
Cc: davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
 pabeni@...hat.com, woojung.huh@...rochip.com, kernel@...gutronix.de,
 linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
 UNGLinuxDriver@...rochip.com
Subject: Re: [PATCH net v1 1/1] net: lan78xx: fix runtime PM count underflow on
 link stop

Hello:

This patch was applied to netdev/net.git (main)
by David S. Miller <davem@...emloft.net>:

On Wed, 28 Feb 2024 13:45:17 +0100 you wrote:
> Current driver has some asymmetry in the runtime PM calls. On lan78xx_open()
> it will call usb_autopm_get() and unconditionally usb_autopm_put(). And
> on lan78xx_stop() it will call only usb_autopm_put(). So far, it was
> working only because this driver do not activate autosuspend by default,
> so it was visible only by warning "Runtime PM usage count underflow!".
> 
> Since, with current driver, we can't use runtime PM with active link,
> execute lan78xx_open()->usb_autopm_put() only in error case. Otherwise,
> keep ref counting high as long as interface is open.
> 
> [...]

Here is the summary with links:
  - [net,v1,1/1] net: lan78xx: fix runtime PM count underflow on link stop
    https://git.kernel.org/netdev/net/c/1eecc7ab82c4

You are awesome, thank you!
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