linux-kernel - Re: [PATCH 1/2] staging: rtl8192u: remove unnecessary function implementation

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Date:   Wed, 26 Oct 2022 17:42:23 +0530
From:   Deepak R Varma <drv@...lo.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     outreachy@...ts.linux.dev, linux-staging@...ts.linux.dev,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] staging: rtl8192u: remove unnecessary function
 implementation

On Wed, Oct 26, 2022 at 12:44:36PM +0200, Greg Kroah-Hartman wrote:
> On Wed, Oct 26, 2022 at 08:57:48AM +0530, Deepak R Varma wrote:
> > Current implementation of function ieee80211_tkip_null simply returns
> > back to the caller without any useful instruction executions. This makes
> > the function call and its implementation unnecessary and should be
> > removed.
> >
> > Signed-off-by: Deepak R Varma <drv@...lo.com>
> > ---
> >  drivers/staging/rtl8192u/ieee80211/ieee80211.h            | 3 ---
> >  drivers/staging/rtl8192u/ieee80211/ieee80211_crypt_tkip.c | 6 ------
> >  drivers/staging/rtl8192u/ieee80211/ieee80211_module.c     | 3 ---
> >  3 files changed, 12 deletions(-)
> >
> > diff --git a/drivers/staging/rtl8192u/ieee80211/ieee80211.h b/drivers/staging/rtl8192u/ieee80211/ieee80211.h
> > index 9cd4b1896745..00c07455cbb3 100644
> > --- a/drivers/staging/rtl8192u/ieee80211/ieee80211.h
> > +++ b/drivers/staging/rtl8192u/ieee80211/ieee80211.h
> > @@ -232,8 +232,6 @@ struct cb_desc {
> >
> >  #define ieee80211_ccmp_null		ieee80211_ccmp_null_rsl
> >
> > -#define ieee80211_tkip_null		ieee80211_tkip_null_rsl
> > -
> >  #define free_ieee80211			free_ieee80211_rsl
> >  #define alloc_ieee80211			alloc_ieee80211_rsl
> >
> > @@ -2256,7 +2254,6 @@ void ieee80211_ps_tx_ack(struct ieee80211_device *ieee, short success);
> >  void softmac_mgmt_xmit(struct sk_buff *skb, struct ieee80211_device *ieee);
> >
> >  /* ieee80211_crypt_ccmp&tkip&wep.c */
> > -void ieee80211_tkip_null(void);
> >
> >  int ieee80211_crypto_init(void);
> >  void ieee80211_crypto_deinit(void);
> > diff --git a/drivers/staging/rtl8192u/ieee80211/ieee80211_crypt_tkip.c b/drivers/staging/rtl8192u/ieee80211/ieee80211_crypt_tkip.c
> > index 7b120b8cb982..9bfd24ad46b6 100644
> > --- a/drivers/staging/rtl8192u/ieee80211/ieee80211_crypt_tkip.c
> > +++ b/drivers/staging/rtl8192u/ieee80211/ieee80211_crypt_tkip.c
> > @@ -716,9 +716,3 @@ void ieee80211_crypto_tkip_exit(void)
> >  {
> >  	ieee80211_unregister_crypto_ops(&ieee80211_crypt_tkip);
> >  }
> > -
> > -void ieee80211_tkip_null(void)
> > -{
> > -//    printk("============>%s()\n", __func__);
> > -	return;
> > -}
> > diff --git a/drivers/staging/rtl8192u/ieee80211/ieee80211_module.c b/drivers/staging/rtl8192u/ieee80211/ieee80211_module.c
> > index b94fe9b449b6..3f93939bc4ee 100644
> > --- a/drivers/staging/rtl8192u/ieee80211/ieee80211_module.c
> > +++ b/drivers/staging/rtl8192u/ieee80211/ieee80211_module.c
> > @@ -159,9 +159,6 @@ struct net_device *alloc_ieee80211(int sizeof_priv)
> >  		ieee->last_packet_time[i] = 0;
> >  	}
> >
> > -/* These function were added to load crypte module autoly */
> > -	ieee80211_tkip_null();
> > -
>
> Ah, but this was created on purpose, did you now break the module
> autoloading here?  Is this built as a separate module or is it all one
> big module?

Looks like a one big module on the kernel I built post this change. I looked
into the modules.dep file for dependencies. I was able to load the driver
r8192u_usb using modprobe without any issues.

Let me know if I should be looking at something else to validate your concern.

>
> You need to explain why this does not change functionality in your
> changelog text.

Okay. I will work on it and send in a revision.

>
> thanks,
>
> greg k-h
>