Return-path: Received: from mail-ob0-f182.google.com ([209.85.214.182]:32946 "EHLO mail-ob0-f182.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933151AbcBYRDI (ORCPT ); Thu, 25 Feb 2016 12:03:08 -0500 Received: by mail-ob0-f182.google.com with SMTP id jq7so53703523obb.0 for ; Thu, 25 Feb 2016 09:03:08 -0800 (PST) From: Larry Finger To: kvalo@codeaurora.org Cc: devel@driverdev.osuosl.org, linux-wireless@vger.kernel.org, Larry Finger Subject: [PATCH] rtlwifi: Fix size of wireless mode variable Date: Thu, 25 Feb 2016 11:03:01 -0600 Message-Id: <1456419781-14722-1-git-send-email-Larry.Finger@lwfinger.net> (sfid-20160225_180314_229478_5911017B) Sender: linux-wireless-owner@vger.kernel.org List-ID: Smatch reports the following warning: CHECK drivers/net/wireless/realtek/rtlwifi/rc.c drivers/net/wireless/realtek/rtlwifi/rc.c:144 _rtl_rc_rate_set_series() warn: impossible condition '(wireless_mode == 256) => (0-255 == 256)' This warning arises because commit acc6907b87a9 ("rtlwifi: Fix warning from ieee80211_get_tx_rates() when using 5G") now checks the wireless mode for WIRELESS_MODE_AC_ONLY (BIT(8)) in _rtl_rc_rate_set_series(). As a result, all quantities used to store the wireless mode must be u16. This patch also reorders struct rtl_sta_info to save a little space. Fixes: commit acc6907b87a9 ("rtlwifi: Fix warning from ieee80211_get_tx_rates() when using 5G") Reported-by: Dan Williams Signed-off-by: Larry Finger --- drivers/net/wireless/realtek/rtlwifi/rc.c | 4 ++-- drivers/net/wireless/realtek/rtlwifi/rtl8821ae/hw.c | 2 +- drivers/net/wireless/realtek/rtlwifi/wifi.h | 9 ++++----- 3 files changed, 7 insertions(+), 8 deletions(-) diff --git a/drivers/net/wireless/realtek/rtlwifi/rc.c b/drivers/net/wireless/realtek/rtlwifi/rc.c index 28f7010..1aca777 100644 --- a/drivers/net/wireless/realtek/rtlwifi/rc.c +++ b/drivers/net/wireless/realtek/rtlwifi/rc.c @@ -41,7 +41,7 @@ static u8 _rtl_rc_get_highest_rix(struct rtl_priv *rtlpriv, struct rtl_hal *rtlhal = rtl_hal(rtlpriv); struct rtl_phy *rtlphy = &(rtlpriv->phy); struct rtl_sta_info *sta_entry = NULL; - u8 wireless_mode = 0; + u16 wireless_mode = 0; /* *this rate is no use for true rate, firmware @@ -99,7 +99,7 @@ static void _rtl_rc_rate_set_series(struct rtl_priv *rtlpriv, { struct rtl_mac *mac = rtl_mac(rtlpriv); struct rtl_sta_info *sta_entry = NULL; - u8 wireless_mode = 0; + u16 wireless_mode = 0; u8 sgi_20 = 0, sgi_40 = 0, sgi_80 = 0; if (sta) { diff --git a/drivers/net/wireless/realtek/rtlwifi/rtl8821ae/hw.c b/drivers/net/wireless/realtek/rtlwifi/rtl8821ae/hw.c index 5da9bd0..fe900ba 100644 --- a/drivers/net/wireless/realtek/rtlwifi/rtl8821ae/hw.c +++ b/drivers/net/wireless/realtek/rtlwifi/rtl8821ae/hw.c @@ -3837,7 +3837,7 @@ void rtl8821ae_update_channel_access_setting(struct ieee80211_hw *hw) { struct rtl_priv *rtlpriv = rtl_priv(hw); struct rtl_mac *mac = rtl_mac(rtl_priv(hw)); - u8 wireless_mode = mac->mode; + u16 wireless_mode = mac->mode; u8 sifs_timer, r2t_sifs; rtlpriv->cfg->ops->set_hw_reg(hw, HW_VAR_SLOT_TIME, diff --git a/drivers/net/wireless/realtek/rtlwifi/wifi.h b/drivers/net/wireless/realtek/rtlwifi/wifi.h index b07b364..554d814 100644 --- a/drivers/net/wireless/realtek/rtlwifi/wifi.h +++ b/drivers/net/wireless/realtek/rtlwifi/wifi.h @@ -1318,14 +1318,13 @@ struct rtl_tid_data { struct rtl_sta_info { struct list_head list; - u8 ratr_index; - u8 wireless_mode; - u8 mimo_ps; - u8 mac_addr[ETH_ALEN]; struct rtl_tid_data tids[MAX_TID_COUNT]; - /* just used for ap adhoc or mesh*/ struct rssi_sta rssi_stat; + u16 wireless_mode; + u8 ratr_index; + u8 mimo_ps; + u8 mac_addr[ETH_ALEN]; } __packed; struct rtl_priv; -- 2.1.4