From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Tue, 29 Sep 2020 22:25:18 +0200
Subject: net: fec_mpc52xx: Replace in_interrupt() usage
Git-commit: c35a0824e88bf444c978080ef7698bcf73f44c20
Patch-mainline: v5.10-rc1
References: jsc#SLE-16106

The usage of in_interrupt() in drivers is phased out and Linus clearly
requested that code which changes behaviour depending on context should
either be seperated or the context be conveyed in an argument passed by the
caller, which usually knows the context.

mpc52xx_fec_stop() uses in_interrupt() to check if it is safe to sleep. All
callers run in well defined contexts.

Pass an argument from the callers indicating whether it is safe to sleep.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
---
 drivers/net/ethernet/freescale/fec_mpc52xx.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/freescale/fec_mpc52xx.c b/drivers/net/ethernet/freescale/fec_mpc52xx.c
index 7a3f066e611d..b3bad429e03b 100644
--- a/drivers/net/ethernet/freescale/fec_mpc52xx.c
+++ b/drivers/net/ethernet/freescale/fec_mpc52xx.c
@@ -74,7 +74,7 @@ struct mpc52xx_fec_priv {
 static irqreturn_t mpc52xx_fec_interrupt(int, void *);
 static irqreturn_t mpc52xx_fec_rx_interrupt(int, void *);
 static irqreturn_t mpc52xx_fec_tx_interrupt(int, void *);
-static void mpc52xx_fec_stop(struct net_device *dev);
+static void mpc52xx_fec_stop(struct net_device *dev, bool may_sleep);
 static void mpc52xx_fec_start(struct net_device *dev);
 static void mpc52xx_fec_reset(struct net_device *dev);
 
@@ -283,7 +283,7 @@ static int mpc52xx_fec_close(struct net_device *dev)
 
 	netif_stop_queue(dev);
 
-	mpc52xx_fec_stop(dev);
+	mpc52xx_fec_stop(dev, true);
 
 	mpc52xx_fec_free_rx_buffers(dev, priv->rx_dmatsk);
 
@@ -693,7 +693,7 @@ static void mpc52xx_fec_start(struct net_device *dev)
  *
  * stop all activity on fec and empty dma buffers
  */
-static void mpc52xx_fec_stop(struct net_device *dev)
+static void mpc52xx_fec_stop(struct net_device *dev, bool may_sleep)
 {
 	struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 	struct mpc52xx_fec __iomem *fec = priv->fec;
@@ -706,7 +706,7 @@ static void mpc52xx_fec_stop(struct net_device *dev)
 	bcom_disable(priv->rx_dmatsk);
 
 	/* Wait for tx queue to drain, but only if we're in process context */
-	if (!in_interrupt()) {
+	if (may_sleep) {
 		timeout = jiffies + msecs_to_jiffies(2000);
 		while (time_before(jiffies, timeout) &&
 				!bcom_queue_empty(priv->tx_dmatsk))
@@ -738,7 +738,7 @@ static void mpc52xx_fec_reset(struct net_device *dev)
 	struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 	struct mpc52xx_fec __iomem *fec = priv->fec;
 
-	mpc52xx_fec_stop(dev);
+	mpc52xx_fec_stop(dev, false);
 
 	out_be32(&fec->rfifo_status, in_be32(&fec->rfifo_status));
 	out_be32(&fec->reset_cntrl, FEC_RESET_CNTRL_RESET_FIFO);