linux-kernel - [PATCH 4.17 220/324] net: ieee802154: adf7242: Fix erroneous RX enable

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Message-Id: <20180823075007.180828636@linuxfoundation.org>
Date:   Thu, 23 Aug 2018 09:54:46 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Michael Hennerich <michael.hennerich@...log.com>,
        Alexandru Ardelean <alexandru.ardelean@...log.com>,
        Stefan Schmidt <stefan@...enfreihafen.org>,
        Sasha Levin <alexander.levin@...rosoft.com>
Subject: [PATCH 4.17 220/324] net: ieee802154: adf7242: Fix erroneous RX enable

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

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

From: Michael Hennerich <michael.hennerich@...log.com>

[ Upstream commit 36d26d6b6208399070a9d7993534fef9fc26b1ba ]

Only enable RX mode if the netdev is opened.

Signed-off-by: Michael Hennerich <michael.hennerich@...log.com>
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@...log.com>
Signed-off-by: Stefan Schmidt <stefan@...enfreihafen.org>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/ieee802154/adf7242.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

--- a/drivers/net/ieee802154/adf7242.c
+++ b/drivers/net/ieee802154/adf7242.c
@@ -719,7 +719,10 @@ static int adf7242_channel(struct ieee80
 	adf7242_write_reg(lp, REG_CH_FREQ1, freq >> 8);
 	adf7242_write_reg(lp, REG_CH_FREQ2, freq >> 16);
 
-	return adf7242_cmd(lp, CMD_RC_RX);
+	if (test_bit(FLAG_START, &lp->flags))
+		return adf7242_cmd_rx(lp);
+	else
+		return adf7242_cmd(lp, CMD_RC_PHY_RDY);
 }
 
 static int adf7242_set_hw_addr_filt(struct ieee802154_hw *hw,