linux-kernel - [PATCH 4.4 63/79] net: qca_spi: Make sure the QCA7000 reset is triggered

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Message-Id: <20180823074923.261288039@linuxfoundation.org>
Date:   Thu, 23 Aug 2018 09:53:39 +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, Stefan Wahren <stefan.wahren@...e.com>,
        "David S. Miller" <davem@...emloft.net>,
        Sasha Levin <alexander.levin@...rosoft.com>
Subject: [PATCH 4.4 63/79] net: qca_spi: Make sure the QCA7000 reset is triggered

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

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

From: Stefan Wahren <stefan.wahren@...e.com>

[ Upstream commit 711c62dfa6bdb4326ca6c587f295ea5c4f7269de ]

In case the SPI thread is not running, a simple reset of sync
state won't fix the transmit timeout. We also need to wake up the kernel
thread.

Signed-off-by: Stefan Wahren <stefan.wahren@...e.com>
Fixes: ed7d42e24eff ("net: qca_spi: fix transmit queue timeout handling")
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/ethernet/qualcomm/qca_spi.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/net/ethernet/qualcomm/qca_spi.c
+++ b/drivers/net/ethernet/qualcomm/qca_spi.c
@@ -739,6 +739,9 @@ qcaspi_netdev_tx_timeout(struct net_devi
 	qca->net_dev->stats.tx_errors++;
 	/* Trigger tx queue flush and QCA7000 reset */
 	qca->sync = QCASPI_SYNC_UNKNOWN;
+
+	if (qca->spi_thread)
+		wake_up_process(qca->spi_thread);
 }
 
 static int