[PATCH 4.12 16/22] rt2800: fix TX_PIN_CFG setting for non MT7620 chips

From	Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Newsgroups	linux.kernel
Subject	[PATCH 4.12 16/22] rt2800: fix TX_PIN_CFG setting for non MT7620 chips
Date	2017-09-12 19:10 +0200
Message-ID	<uoWRc-43L-7@gated-at.bofh.it> (permalink)
References	<uoWRc-43L-9@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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

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

From: Stanislaw Gruszka <sgruszka@redhat.com>

commit 83ec489193894e52bd395eec470f4f7c4286d4a5 upstream.

Since commit 41977e86c984 ("rt2x00: add support for MT7620") we do not
initialize TX_PIN_CFG setting. This cause breakage at least on some
RT3573 devices. To fix the problem patch restores previous behaviour
for non MT7620 chips.

Fixes: 41977e86c984 ("rt2x00: add support for MT7620")
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1480829
Reported-and-tested-by: Jussi Eloranta <jussi.eloranta@csun.edu>
Cc: Daniel Golle <daniel@makrotopia.org>
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Acked-by: Daniel Golle <daniel@makrotopia.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/net/wireless/ralink/rt2x00/rt2800lib.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

--- a/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
+++ b/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
@@ -3699,7 +3699,10 @@ static void rt2800_config_channel(struct
 	if (rt2x00_rt(rt2x00dev, RT3572))
 		rt2800_rfcsr_write(rt2x00dev, 8, 0);
 
-	rt2800_register_read(rt2x00dev, TX_PIN_CFG, &tx_pin);
+	if (rt2x00_rt(rt2x00dev, RT6352))
+		rt2800_register_read(rt2x00dev, TX_PIN_CFG, &tx_pin);
+	else
+		tx_pin = 0;
 
 	switch (rt2x00dev->default_ant.tx_chain_num) {
 	case 3:

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[PATCH 4.12 16/22] rt2800: fix TX_PIN_CFG setting for non MT7620 chips Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-09-12 19:10 +0200

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