linux-kernel - [PATCH] rtl8xxxu: fix tx rate debug output

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Message-Id: <20161128210815.2368509-1-arnd@arndb.de>
Date:   Mon, 28 Nov 2016 22:08:04 +0100
From:   Arnd Bergmann <arnd@...db.de>
To:     Jes Sorensen <Jes.Sorensen@...hat.com>
Cc:     Arnd Bergmann <arnd@...db.de>, Kalle Valo <kvalo@...eaurora.org>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] rtl8xxxu: fix tx rate debug output

We accidentally print the rate before we know it for txdesc_v2:

wireless/realtek/rtl8xxxu/rtl8xxxu_core.c: In function 'rtl8xxxu_fill_txdesc_v2':
wireless/realtek/rtl8xxxu/rtl8xxxu_core.c:4848:3: error: 'rate' may be used uninitialized in this function [-Werror=maybe-uninitialized]

txdesc_v1 got it right, so let's do it the same way here.

Fixes: b4c3d9cfb607 ("rtl8xxxu: Pass tx_info to fill_txdesc in order to have access to retry count")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c
index 04141e57b8ae..a9137abc3ad9 100644
--- a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c
+++ b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c
@@ -4844,16 +4844,16 @@ rtl8xxxu_fill_txdesc_v2(struct ieee80211_hw *hw, struct ieee80211_hdr *hdr,
 
 	tx_desc40 = (struct rtl8xxxu_txdesc40 *)tx_desc32;
 
-	if (rtl8xxxu_debug & RTL8XXXU_DEBUG_TX)
-		dev_info(dev, "%s: TX rate: %d, pkt size %d\n",
-			 __func__, rate, cpu_to_le16(tx_desc40->pkt_size));
-
 	if (rate_flags & IEEE80211_TX_RC_MCS &&
 	    !ieee80211_is_mgmt(hdr->frame_control))
 		rate = tx_info->control.rates[0].idx + DESC_RATE_MCS0;
 	else
 		rate = tx_rate->hw_value;
 
+	if (rtl8xxxu_debug & RTL8XXXU_DEBUG_TX)
+		dev_info(dev, "%s: TX rate: %d, pkt size %d\n",
+			 __func__, rate, cpu_to_le16(tx_desc40->pkt_size));
+
 	seq_number = IEEE80211_SEQ_TO_SN(le16_to_cpu(hdr->seq_ctrl));
 
 	tx_desc40->txdw4 = cpu_to_le32(rate);
-- 
2.9.0