From: Stefan Wahren <stefan.wahren@i2se.com>
Date: Wed, 18 Jul 2018 06:31:43 +0000 (+0200)
Subject: net: qca_spi: Avoid packet drop during initial sync
X-Git-Tag: v4.9.124~17
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=167e93c3e131b29a117a13719d052dbe752290ae;p=platform%2Fkernel%2Flinux-amlogic.git

net: qca_spi: Avoid packet drop during initial sync

[ Upstream commit b2bab426dc715de147f8039a3fccff27d795f4eb ]

As long as the synchronization with the QCA7000 isn't finished, we
cannot accept packets from the upper layers. So let the SPI thread
enable the TX queue after sync and avoid unwanted packet drop.

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Fixes: 291ab06ecf67 ("net: qualcomm: new Ethernet over SPI driver for QCA7000")
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/net/ethernet/qualcomm/qca_spi.c b/drivers/net/ethernet/qualcomm/qca_spi.c
index 8bbb55f31909..d8ec8194f99d 100644
--- a/drivers/net/ethernet/qualcomm/qca_spi.c
+++ b/drivers/net/ethernet/qualcomm/qca_spi.c
@@ -635,7 +635,7 @@ qcaspi_netdev_open(struct net_device *dev)
 		return ret;
 	}
 
-	netif_start_queue(qca->net_dev);
+	/* SPI thread takes care of TX queue */
 
 	return 0;
 }