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Message-ID: <3394965.k4CYVUhDiD@localhost.localdomain> Date: Sat, 23 Oct 2021 16:02:16 +0200 From: "Fabio M. De Francesco" <fmdefrancesco@...il.com> To: Phillip Potter <phil@...lpotter.co.uk>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org, Larry Finger <Larry.Finger@...inger.net> Subject: Re: [PATCH] staging: r8188eu: Use a Mutex instead of a binary Semaphore On Friday, October 22, 2021 7:52:33 PM CEST Larry Finger wrote: > On 10/22/21 12:19, Fabio M. De Francesco wrote: > > Use a Mutex instead of a binary Semaphore for the purpose of enforcing > > mutual exclusive access to the "pwrctrl_priv" structure. > > > > Mutexes are sleeping locks similar to Semaphores with a 'count' of one > > (like binary Semaphores), however they have a simpler interface, more > > efficient performance, and additional constraints. > > > > There is no change in the logic of the new code; however it is more > > simple because it gets rid of four unnecessary wrappers: > > _init_pwrlock(), _enter_pwrlock(),_exit_pwrlock(), _rtw_down_sema(). > > > > Actually, there is a change in the state in which the code waits for > > acquiring locks, because it makes it in an uninterruptible state > > (instead the old code used down_interruptible()). Interruptible > > waits are neither required nor wanted in this driver. > > > > Tested with ASUSTek Computer, Inc. Realtek 8188EUS [USB-N10 Nano]. > > > > Signed-off-by: Fabio M. De Francesco <fmdefrancesco@...il.com> > > Well done. > > Acked-by: Larry Finger <Larry.Finger@...inger.net> > Hi Larry, Thank you very much for giving your "Acked-by" tag, and, above all, for the "Well done". Best regards, Fabio
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