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

Greg Kroah-Hartman
2018-08-23T08:01:07Z

From: Stefan Wahren <stefan.wahren@i2se.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@i2se.com>
Fixes: ed7d42e24eff ("net: qca_spi: fix transmit queue timeout handling")
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>
---
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