linux-kernel - Re: [PATCH] mwifiex: Add quirk to disable deep sleep with certain hardware revision

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Message-ID: <YYKZkz3EFfdENhoZ@smile.fi.intel.com>
Date:   Wed, 3 Nov 2021 16:15:47 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Jonas Dreßler <verdre@...d.nl>
Cc:     Brian Norris <briannorris@...omium.org>,
        Amitkumar Karwar <amitkarwar@...il.com>,
        Ganapathi Bhat <ganapathi017@...il.com>,
        Xinming Hu <huxinming820@...il.com>,
        Kalle Valo <kvalo@...eaurora.org>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Tsuchiya Yuto <kitakar@...il.com>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Maximilian Luz <luzmaximilian@...il.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Pali Rohár <pali@...nel.org>
Subject: Re: [PATCH] mwifiex: Add quirk to disable deep sleep with certain
 hardware revision

On Wed, Nov 03, 2021 at 02:37:53PM +0100, Jonas Dreßler wrote:
> On 11/3/21 13:25, Jonas Dreßler wrote:

...

> > > > +               if (strncmp(ver_ext->version_str, "ChipRev:20, BB:9b(10.00), RF:40(21)", 128) == 0) {
> > > 
> > > Rather than memorize the 128-size array here, maybe use
> > > sizeof(ver_ext->version_str) ?
> > 
> > Sounds like a good idea, yeah.
> 
> Nevermind, the reason I did this was for consistency in the
> function, right underneath in the same function it also assumes
> a fixed size of 128 characters, so I'd rather use the same
> length.
> 
> > 		memcpy(version_ext->version_str, ver_ext->version_str,
> > 		       sizeof(char) * 128);

Besides sizeof(char)...

> > 		memcpy(priv->version_str, ver_ext->version_str, 128);
> 
> Might be a good idea to #define it as MWIFIEX_VERSION_STR_LENGTH
> in fw.h though...

...I think you simply need a precursor patch that changes this
to sizeof() / #define approach.

-- 
With Best Regards,
Andy Shevchenko