linux-kernel - Re: [PATCH 02/10] staging: rtl8192e: Calculate definition of MSR_LINK

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Date:   Wed, 08 Feb 2023 07:56:03 -0800
From:   Joe Perches <joe@...ches.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Philipp Hortmann <philipp.g.hortmann@...il.com>
Cc:     linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 02/10] staging: rtl8192e: Calculate definition of
 MSR_LINK_MASK

On Wed, 2023-02-08 at 13:31 +0100, Greg Kroah-Hartman wrote:
> On Tue, Feb 07, 2023 at 07:16:22PM +0100, Philipp Hortmann wrote:
> > Calculate definition of MSR_LINK_MASK ((1<<0)|(1<<1)) = 3. Equation is not
> > accepted by checkpatch because of missing spaces.
[]
> > diff --git a/drivers/staging/rtl8192e/rtl8192e/r8192E_hw.h b/drivers/staging/rtl8192e/rtl8192e/r8192E_hw.h
[]
> > @@ -170,7 +170,7 @@ enum _RTL8192PCI_HW {
> >  #define	BW_OPMODE_20MHZ			BIT2
> >  	IC_VERRSION		= 0x301,
> >  	MSR			= 0x303,
> > -#define MSR_LINK_MASK      ((1<<0)|(1<<1))
> > +#define MSR_LINK_MASK      3
> 
> This is a bit field, it should be:
> 	#define MSR_LINK_MASK	(BIT(1) | BIT(0))
> right?

Perhaps better as GENMASK(1, 0)