linux-kernel - [PATCH 4.9 007/116] rtl8xxxu: Work around issue with 8192eu and 8723bu devices not reconnecting

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Message-Id: <20170106213909.097496113@linuxfoundation.org>
Date:   Fri,  6 Jan 2017 22:42:49 +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, Barry Day <briselec@...il.com>,
        Jes Sorensen <Jes.Sorensen@...hat.com>,
        Kalle Valo <kvalo@...eaurora.org>
Subject: [PATCH 4.9 007/116] rtl8xxxu: Work around issue with 8192eu and 8723bu devices not reconnecting

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

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

From: Jes Sorensen <Jes.Sorensen@...hat.com>

commit c59f13bbead475096bdfebc7ef59c12e180858de upstream.

The H2C MEDIA_STATUS_RPT command for some reason causes 8192eu and
8723bu devices not being able to reconnect.

Reported-by: Barry Day <briselec@...il.com>
Signed-off-by: Jes Sorensen <Jes.Sorensen@...hat.com>
Signed-off-by: Kalle Valo <kvalo@...eaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c |    8 ++++++++
 1 file changed, 8 insertions(+)

--- a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c
+++ b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c
@@ -4372,6 +4372,13 @@ void rtl8xxxu_gen1_report_connect(struct
 void rtl8xxxu_gen2_report_connect(struct rtl8xxxu_priv *priv,
 				  u8 macid, bool connect)
 {
+#ifdef RTL8XXXU_GEN2_REPORT_CONNECT
+	/*
+	 * Barry Day reports this causes issues with 8192eu and 8723bu
+	 * devices reconnecting. The reason for this is unclear, but
+	 * until it is better understood, leave the code in place but
+	 * disabled, so it is not lost.
+	 */
 	struct h2c_cmd h2c;
 
 	memset(&h2c, 0, sizeof(struct h2c_cmd));
@@ -4383,6 +4390,7 @@ void rtl8xxxu_gen2_report_connect(struct
 		h2c.media_status_rpt.parm &= ~BIT(0);
 
 	rtl8xxxu_gen2_h2c_cmd(priv, &h2c, sizeof(h2c.media_status_rpt));
+#endif
 }
 
 void rtl8xxxu_gen1_init_aggregation(struct rtl8xxxu_priv *priv)