linux-kernel - Re: staging: r8188eu: how to handle nested mutex under spinlock

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Message-ID: <6a1d7485-d405-d9a6-fefd-5a10d038d493@gmail.com>
Date:   Sun, 3 Apr 2022 10:44:46 +0200
From:   Michael Straube <straube.linux@...il.com>
To:     Larry Finger <Larry.Finger@...inger.net>,
        Greg KH <gregkh@...uxfoundation.org>
Cc:     Phillip Potter <phil@...lpotter.co.uk>,
        "open list:STAGING SUBSYSTEM" <linux-staging@...ts.linux.dev>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: staging: r8188eu: how to handle nested mutex under spinlock

On 4/2/22 23:32, Larry Finger wrote:
> In drivers/net/wireless/realtek/rtlwifi, we had a similar problem. There 
> it was handled by putting the lps_enter() and lps_leave() operations in 
> a separate workqueue. In this case, the routines were rtl_lps_enter() 
> and rtl_lps_leave(). Each of them sets a variable to indicate whether 
> enter_ps is true or false, and schedules the workqueue. In the 
> workqueue's callback routine, the routines to start/stop ps mode are 
> called. The code is in drivers/net/wireless/realtek/rtlwifi/ps.c.
> 
> This solution is only one of many, and there may be a better one.
> 
> Larry
> 

Thank you for the explanation Larry.

Michael