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Date:   Sat, 24 Jun 2023 08:04:20 +0200
From:   Philipp Hortmann <philipp.g.hortmann@gmail.com>
To:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        linux-staging@lists.linux.dev, linux-kernel@vger.kernel.org
Subject: [PATCH 07/11] staging: rtl8192e: Remove variable host_decrypt as it
 is constant
Message-ID: <637350e9bc3edded665009a30d12350157e8a9a9.1687583718.git.philipp.g.hortmann@gmail.com>
References: <cover.1687583718.git.philipp.g.hortmann@gmail.com>
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In-Reply-To: <cover.1687583718.git.philipp.g.hortmann@gmail.com>
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ieee->host_decrypt also named priv->rtllib->host_decrypt is initialized
to 1 and then unchanged. All evaluations will result accordingly. Remove
resulting dead code.

Signed-off-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
---
 drivers/staging/rtl8192e/rtl8192e/rtl_core.c |  1 -
 drivers/staging/rtl8192e/rtllib.h            |  3 --
 drivers/staging/rtl8192e/rtllib_module.c     |  2 -
 drivers/staging/rtl8192e/rtllib_rx.c         | 44 ++++++++++----------
 4 files changed, 21 insertions(+), 29 deletions(-)

diff --git a/drivers/staging/rtl8192e/rtl8192e/rtl_core.c b/drivers/staging/rtl8192e/rtl8192e/rtl_core.c
index 838b9c8b0df7..2f504a4838a8 100644
--- a/drivers/staging/rtl8192e/rtl8192e/rtl_core.c
+++ b/drivers/staging/rtl8192e/rtl8192e/rtl_core.c
@@ -804,7 +804,6 @@ static void _rtl92e_init_priv_variable(struct net_device *dev)
 	priv->rtllib->iw_mode = IW_MODE_INFRA;
 	priv->rtllib->active_scan = 1;
 	priv->rtllib->be_scan_inprogress = false;
-	priv->rtllib->host_decrypt = 1;
 
 	priv->rtllib->fts = DEFAULT_FRAG_THRESHOLD;
 
diff --git a/drivers/staging/rtl8192e/rtllib.h b/drivers/staging/rtl8192e/rtllib.h
index 80090f8a38e7..c7f800a0c48c 100644
--- a/drivers/staging/rtl8192e/rtllib.h
+++ b/drivers/staging/rtl8192e/rtllib.h
@@ -1440,9 +1440,6 @@ struct rtllib_device {
 				 * WEP key changes
 				 */
 
-	/* If the host performs {en,de}cryption, then set to 1 */
-	int host_decrypt;
-
 	int ieee802_1x; /* is IEEE 802.1X used */
 
 	/* WPA data */
diff --git a/drivers/staging/rtl8192e/rtllib_module.c b/drivers/staging/rtl8192e/rtllib_module.c
index 2ad2e3671ec4..2416e0c60255 100644
--- a/drivers/staging/rtl8192e/rtllib_module.c
+++ b/drivers/staging/rtl8192e/rtllib_module.c
@@ -97,8 +97,6 @@ struct net_device *alloc_rtllib(int sizeof_priv)
 	ieee->scan_age = DEFAULT_MAX_SCAN_AGE;
 	ieee->open_wep = 1;
 
-	/* Default to enabling full open WEP with host based encrypt/decrypt */
-	ieee->host_decrypt = 1;
 	ieee->ieee802_1x = 1; /* Default to supporting 802.1x */
 
 	ieee->rtllib_ap_sec_type = rtllib_ap_sec_type;
diff --git a/drivers/staging/rtl8192e/rtllib_rx.c b/drivers/staging/rtl8192e/rtllib_rx.c
index 91dd3c373aef..195ce0fecd29 100644
--- a/drivers/staging/rtl8192e/rtllib_rx.c
+++ b/drivers/staging/rtl8192e/rtllib_rx.c
@@ -1035,29 +1035,27 @@ static int rtllib_rx_get_crypt(struct rtllib_device *ieee, struct sk_buff *skb,
 	u16 fc = le16_to_cpu(hdr->frame_ctl);
 	int idx = 0;
 
-	if (ieee->host_decrypt) {
-		if (skb->len >= hdrlen + 3)
-			idx = skb->data[hdrlen + 3] >> 6;
+	if (skb->len >= hdrlen + 3)
+		idx = skb->data[hdrlen + 3] >> 6;
 
-		*crypt = ieee->crypt_info.crypt[idx];
-		/* allow NULL decrypt to indicate an station specific override
-		 * for default encryption
+	*crypt = ieee->crypt_info.crypt[idx];
+	/* allow NULL decrypt to indicate an station specific override
+	 * for default encryption
+	 */
+	if (*crypt && ((*crypt)->ops == NULL ||
+		      (*crypt)->ops->decrypt_mpdu == NULL))
+		*crypt = NULL;
+
+	if (!*crypt && (fc & RTLLIB_FCTL_WEP)) {
+		/* This seems to be triggered by some (multicast?)
+		 * frames from other than current BSS, so just drop the
+		 * frames silently instead of filling system log with
+		 * these reports.
 		 */
-		if (*crypt && ((*crypt)->ops == NULL ||
-			      (*crypt)->ops->decrypt_mpdu == NULL))
-			*crypt = NULL;
-
-		if (!*crypt && (fc & RTLLIB_FCTL_WEP)) {
-			/* This seems to be triggered by some (multicast?)
-			 * frames from other than current BSS, so just drop the
-			 * frames silently instead of filling system log with
-			 * these reports.
-			 */
-			netdev_dbg(ieee->dev,
-				   "Decryption failed (not set) (SA= %pM)\n",
-				   hdr->addr2);
-			return -1;
-		}
+		netdev_dbg(ieee->dev,
+			   "Decryption failed (not set) (SA= %pM)\n",
+			   hdr->addr2);
+		return -1;
 	}
 
 	return 0;
@@ -1083,7 +1081,7 @@ static int rtllib_rx_decrypt(struct rtllib_device *ieee, struct sk_buff *skb,
 		ieee->need_sw_enc = 0;
 
 	keyidx = rtllib_rx_frame_decrypt(ieee, skb, crypt);
-	if (ieee->host_decrypt && (fc & RTLLIB_FCTL_WEP) && (keyidx < 0)) {
+	if ((fc & RTLLIB_FCTL_WEP) && (keyidx < 0)) {
 		netdev_info(ieee->dev, "%s: decrypt frame error\n", __func__);
 		return -1;
 	}
@@ -1147,7 +1145,7 @@ static int rtllib_rx_decrypt(struct rtllib_device *ieee, struct sk_buff *skb,
 	/* skb: hdr + (possible reassembled) full MSDU payload; possibly still
 	 * encrypted/authenticated
 	 */
-	if (ieee->host_decrypt && (fc & RTLLIB_FCTL_WEP) &&
+	if ((fc & RTLLIB_FCTL_WEP) &&
 		rtllib_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt)) {
 		netdev_info(ieee->dev, "%s: ==>decrypt msdu error\n", __func__);
 		return -1;
-- 
2.41.0