linux-kernel - Re: [PATCH] staging: rtl8192u: fix line over 80 characters

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Date:   Sat, 16 Jun 2018 16:13:59 -0700
From:   Joe Perches <joe@...ches.com>
To:     valdis.kletnieks@...edu, Hyunil Kim <thtlwlsmsgkfla@...il.com>
Cc:     gregkh@...uxfoundation.org, davem@...emloft.net,
        colin.king@...onical.com, johannes.berg@...el.com,
        Linyu.Yuan@...atel-sbell.com.cn, keescook@...omium.org,
        tvboxspy@...il.com, devel@...verdev.osuosl.org,
        linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: Re: [PATCH] staging: rtl8192u: fix line over 80 characters

On Sat, 2018-06-16 at 15:22 -0400, valdis.kletnieks@...edu wrote:
> On Sat, 16 Jun 2018 15:00:31 +0900, Hyunil Kim said:
> > *fix checkpatch.pl warnings:
> >  WARNING: line over 80 characters
> > +		if (((ieee->wpa_ie[0] == 0xdd) &&
> > +		    (!memcmp(&(ieee->wpa_ie[14]), ccmp_ie, 4))) ||
> > +		    ((ieee->wpa_ie[0] == 0x30) &&
> > +		    (!memcmp(&ieee->wpa_ie[10], ccmp_rsn_ie, 4))))
> 
> Ouch. The && and || at ends of line mean a lot of parenthesis counting to
> figure out which goes with which.  Use additional indentation to help
> understanding.
> 
> +		if (((ieee->wpa_ie[0] == 0xdd) &&
> +			(!memcmp(&(ieee->wpa_ie[14]), ccmp_ie, 4))) ||
> +		    ((ieee->wpa_ie[0] == 0x30) &&
> +			(!memcmp(&ieee->wpa_ie[10], ccmp_rsn_ie, 4))))
> 
> Or perhaps
> 
> +		if (((ieee->wpa_ie[0] == 0xdd) &&
> +			(!memcmp(&(ieee->wpa_ie[14]), ccmp_ie, 4)))
> +		     || ((ieee->wpa_ie[0] == 0x30) &&
> +			(!memcmp(&ieee->wpa_ie[10], ccmp_rsn_ie, 4))))

Or perhaps refactor to something like:
---
 drivers/staging/rtl8192u/r8192U_core.c | 20 +++++++++-----------
 1 file changed, 9 insertions(+), 11 deletions(-)

diff --git a/drivers/staging/rtl8192u/r8192U_core.c b/drivers/staging/rtl8192u/r8192U_core.c
index 8b17400f6c13..593ecc0ae1ae 100644
--- a/drivers/staging/rtl8192u/r8192U_core.c
+++ b/drivers/staging/rtl8192u/r8192U_core.c
@@ -2039,20 +2039,18 @@ static bool GetNmodeSupportBySecCfg8192(struct net_device *dev)
 		   (strcmp(crypt->ops->name, "WEP") == 0));
 
 	/* simply judge  */
-	if (encrypt && (wpa_ie_len == 0)) {
-		/* wep encryption, no N mode setting */
+	/* wep encryption, no N mode setting */
+	if (encrypt && wpa_ie_len == 0)
 		return false;
-	} else if ((wpa_ie_len != 0)) {
-		/* parse pairwise key type */
-		if (((ieee->wpa_ie[0] == 0xdd) && (!memcmp(&(ieee->wpa_ie[14]), ccmp_ie, 4))) || ((ieee->wpa_ie[0] == 0x30) && (!memcmp(&ieee->wpa_ie[10], ccmp_rsn_ie, 4))))
-			return true;
-		else
-			return false;
-	} else {
+
+	if (wpa_ie_len == 0)
 		return true;
-	}
 
-	return true;
+	/* parse pairwise key type */
+	return (ieee->wpa_ie[0] == 0xdd &&
+		!memcmp(&ieee->wpa_ie[14], ccmp_ie, 4)) ||
+	       (ieee->wpa_ie[0] == 0x30 &&
+		!memcmp(&ieee->wpa_ie[10], ccmp_rsn_ie, 4));
 }
 
 static bool GetHalfNmodeSupportByAPs819xUsb(struct net_device *dev)