linux-kernel - Re: [PATCH v3] staging: r8188eu: Remove _enter/_exit_critical

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Message-ID: <03d5fd25-7694-18ee-9e2f-7b4057117197@gmail.com>
Date:   Fri, 27 Aug 2021 17:32:22 +0300
From:   Pavel Skripkin <paskripkin@...il.com>
To:     "Fabio M. De Francesco" <fmdefrancesco@...il.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Larry Finger <Larry.Finger@...inger.net>,
        Phillip Potter <phil@...lpotter.co.uk>,
        Martin Kaiser <martin@...ser.cx>,
        Michael Straube <straube.linux@...il.com>,
        linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] staging: r8188eu: Remove _enter/_exit_critical_mutex()

On 8/20/21 1:12 AM, Fabio M. De Francesco wrote:
> Remove _enter_critical_mutex() and _exit_critical_mutex(). They are
> unnecessary wrappers, respectively to mutex_lock_interruptible() and
> to mutex_unlock(). They also have an odd interface that takes an unused
> argument named pirqL of type unsigned long.
> The original code enters the critical section if the mutex API is
> interrupted while waiting to acquire the lock; therefore it could lead
> to a race condition. Use mutex_lock() because it is uninterruptible and
> so avoid that above-mentioned potential race condition.
> 
> Signed-off-by: Fabio M. De Francesco <fmdefrancesco@...il.com>

Tested-by: Pavel Skripkin <paskripkin@...il.com>
Reviewed-by: Pavel Skripkin <paskripkin@...il.com>

Thanks!


With regards,
Pavel Skripkin