linux-kernel - [PATCH 4.19 055/110] can: flexcan: use can_rx_offload_queue_sorted() for flexcan_irq_bus

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Date:   Thu, 29 Nov 2018 15:12:26 +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, Oleksij Rempel <o.rempel@...gutronix.de>,
        Marc Kleine-Budde <mkl@...gutronix.de>
Subject: [PATCH 4.19 055/110] can: flexcan: use can_rx_offload_queue_sorted() for flexcan_irq_bus_*()

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

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

From: Oleksij Rempel <o.rempel@...gutronix.de>

commit d788905f68fd4714c82936f6f7f1d3644d7ae7ef upstream.

Currently, in case of bus error, driver will generate error message and put
in the tail of the message queue. To avoid confusions, this change should
place the bus related messages in proper order.

Signed-off-by: Oleksij Rempel <o.rempel@...gutronix.de>
Cc: linux-stable <stable@...r.kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/net/can/flexcan.c |   12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

--- a/drivers/net/can/flexcan.c
+++ b/drivers/net/can/flexcan.c
@@ -563,9 +563,13 @@ static netdev_tx_t flexcan_start_xmit(st
 static void flexcan_irq_bus_err(struct net_device *dev, u32 reg_esr)
 {
 	struct flexcan_priv *priv = netdev_priv(dev);
+	struct flexcan_regs __iomem *regs = priv->regs;
 	struct sk_buff *skb;
 	struct can_frame *cf;
 	bool rx_errors = false, tx_errors = false;
+	u32 timestamp;
+
+	timestamp = priv->read(&regs->timer) << 16;
 
 	skb = alloc_can_err_skb(dev, &cf);
 	if (unlikely(!skb))
@@ -612,17 +616,21 @@ static void flexcan_irq_bus_err(struct n
 	if (tx_errors)
 		dev->stats.tx_errors++;
 
-	can_rx_offload_queue_tail(&priv->offload, skb);
+	can_rx_offload_queue_sorted(&priv->offload, skb, timestamp);
 }
 
 static void flexcan_irq_state(struct net_device *dev, u32 reg_esr)
 {
 	struct flexcan_priv *priv = netdev_priv(dev);
+	struct flexcan_regs __iomem *regs = priv->regs;
 	struct sk_buff *skb;
 	struct can_frame *cf;
 	enum can_state new_state, rx_state, tx_state;
 	int flt;
 	struct can_berr_counter bec;
+	u32 timestamp;
+
+	timestamp = priv->read(&regs->timer) << 16;
 
 	flt = reg_esr & FLEXCAN_ESR_FLT_CONF_MASK;
 	if (likely(flt == FLEXCAN_ESR_FLT_CONF_ACTIVE)) {
@@ -652,7 +660,7 @@ static void flexcan_irq_state(struct net
 	if (unlikely(new_state == CAN_STATE_BUS_OFF))
 		can_bus_off(dev);
 
-	can_rx_offload_queue_tail(&priv->offload, skb);
+	can_rx_offload_queue_sorted(&priv->offload, skb, timestamp);
 }
 
 static inline struct flexcan_priv *rx_offload_to_priv(struct can_rx_offload *offload)