linux-kernel - [PATCH 4.4 36/87] r8152: use test_and_clear

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Message-Id: <20180115123353.014917255@linuxfoundation.org>
Date:   Mon, 15 Jan 2018 13:34:35 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Hayes Wang <hayeswang@...ltek.com>,
        "David S. Miller" <davem@...emloft.net>,
        Oliver Neukum <oneukum@...e.com>
Subject: [PATCH 4.4 36/87] r8152: use test_and_clear_bit

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: hayeswang <hayeswang@...ltek.com>

commit 216a8349d3a0dd1bc2afbcc821e374c8f929bd62 upstream.

Replace test_bit() followed by clear_bit() with test_and_clear_bit().

Signed-off-by: Hayes Wang <hayeswang@...ltek.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Oliver Neukum <oneukum@...e.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/net/usb/r8152.c |   20 ++++++--------------
 1 file changed, 6 insertions(+), 14 deletions(-)

--- a/drivers/net/usb/r8152.c
+++ b/drivers/net/usb/r8152.c
@@ -1947,7 +1947,6 @@ static void _rtl8152_set_rx_mode(struct
 	__le32 tmp[2];
 	u32 ocp_data;
 
-	clear_bit(RTL8152_SET_RX_MODE, &tp->flags);
 	netif_stop_queue(netdev);
 	ocp_data = ocp_read_dword(tp, MCU_TYPE_PLA, PLA_RCR);
 	ocp_data &= ~RCR_ACPT_ALL;
@@ -2433,8 +2432,6 @@ static void rtl_phy_reset(struct r8152 *
 	u16 data;
 	int i;
 
-	clear_bit(PHY_RESET, &tp->flags);
-
 	data = r8152_mdio_read(tp, MII_BMCR);
 
 	/* don't reset again before the previous one complete */
@@ -2893,10 +2890,9 @@ static int rtl8152_set_speed(struct r815
 	r8152_mdio_write(tp, MII_ADVERTISE, anar);
 	r8152_mdio_write(tp, MII_BMCR, bmcr);
 
-	if (test_bit(PHY_RESET, &tp->flags)) {
+	if (test_and_clear_bit(PHY_RESET, &tp->flags)) {
 		int i;
 
-		clear_bit(PHY_RESET, &tp->flags);
 		for (i = 0; i < 50; i++) {
 			msleep(20);
 			if ((r8152_mdio_read(tp, MII_BMCR) & BMCR_RESET) == 0)
@@ -2905,7 +2901,6 @@ static int rtl8152_set_speed(struct r815
 	}
 
 out:
-
 	return ret;
 }
 
@@ -2992,7 +2987,6 @@ static void set_carrier(struct r8152 *tp
 	struct net_device *netdev = tp->netdev;
 	u8 speed;
 
-	clear_bit(RTL8152_LINK_CHG, &tp->flags);
 	speed = rtl8152_get_speed(tp);
 
 	if (speed & LINK_STATUS) {
@@ -3042,20 +3036,18 @@ static void rtl_work_func_t(struct work_
 		goto out1;
 	}
 
-	if (test_bit(RTL8152_LINK_CHG, &tp->flags))
+	if (test_and_clear_bit(RTL8152_LINK_CHG, &tp->flags))
 		set_carrier(tp);
 
-	if (test_bit(RTL8152_SET_RX_MODE, &tp->flags))
+	if (test_and_clear_bit(RTL8152_SET_RX_MODE, &tp->flags))
 		_rtl8152_set_rx_mode(tp->netdev);
 
 	/* don't schedule napi before linking */
-	if (test_bit(SCHEDULE_NAPI, &tp->flags) &&
-	    netif_carrier_ok(tp->netdev)) {
-		clear_bit(SCHEDULE_NAPI, &tp->flags);
+	if (test_and_clear_bit(SCHEDULE_NAPI, &tp->flags) &&
+	    netif_carrier_ok(tp->netdev))
 		napi_schedule(&tp->napi);
-	}
 
-	if (test_bit(PHY_RESET, &tp->flags))
+	if (test_and_clear_bit(PHY_RESET, &tp->flags))
 		rtl_phy_reset(tp);
 
 	mutex_unlock(&tp->control);