4.15-stable review patch. If anyone has any objections, please let me know.
------------------
From: Stephane Grosjean <s.grosjean@xxxxxxxxxxxxxxx>
commit ffd137f7043cb30067e1bff6fe62a073ae190b23 upstream.
When an interface starts, the echo_skb array is empty and the network
queue should be started only. This patch replaces useless code and locks
when the internal RX_BARRIER message is received from the IP core, telling
the driver that tx may start.
Signed-off-by: Stephane Grosjean <s.grosjean@xxxxxxxxxxxxxxx>
Cc: linux-stable <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/can/peak_canfd/peak_canfd.c | 13 ++-----------
1 file changed, 2 insertions(+), 11 deletions(-)
--- a/drivers/net/can/peak_canfd/peak_canfd.c
+++ b/drivers/net/can/peak_canfd/peak_canfd.c
@@ -333,7 +333,6 @@ static int pucan_handle_status(struct pe
/* this STATUS is the CNF of the RX_BARRIER: Tx path can be setup */
if (pucan_status_is_rx_barrier(msg)) {
- unsigned long flags;
if (priv->enable_tx_path) {
int err = priv->enable_tx_path(priv);
@@ -342,16 +341,8 @@ static int pucan_handle_status(struct pe
return err;
}
- /* restart network queue only if echo skb array is free */
- spin_lock_irqsave(&priv->echo_lock, flags);
-
- if (!priv->can.echo_skb[priv->echo_idx]) {
- spin_unlock_irqrestore(&priv->echo_lock, flags);
-
- netif_wake_queue(ndev);
- } else {
- spin_unlock_irqrestore(&priv->echo_lock, flags);
- }
+ /* start network queue (echo_skb array is empty) */
+ netif_start_queue(ndev);
return 0;
}