From b17233d385d0b6b43ecf81d43008cb1bbb008166 Mon Sep 17 00:00:00 2001
From: Stephane Grosjean <s.grosjean@peak-system.com>
Date: Wed, 23 Jun 2021 16:26:00 +0200
Subject: [PATCH] can: peak_pciefd: pucan_handle_status(): fix a potential starvation issue in TX path
Git-commit: b17233d385d0b6b43ecf81d43008cb1bbb008166
Patch-mainline: v5.14-rc1
References: git-fixes

Rather than just indicating that transmission can start, this patch
requires the explicit flushing of the network TX queue when the driver
is informed by the device that it can transmit, next to its
configuration.

In this way, if frames have already been written by the application,
they will actually be transmitted.

Fixes: ffd137f7043c ("can: peak/pcie_fd: remove useless code when interface starts")
Link: https://lore.kernel.org/r/20210623142600.149904-1-s.grosjean@peak-system.com
Cc: linux-stable <stable@vger.kernel.org>
Signed-off-by: Stephane Grosjean <s.grosjean@peak-system.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/net/can/peak_canfd/peak_canfd.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/can/peak_canfd/peak_canfd.c b/drivers/net/can/peak_canfd/peak_canfd.c
index 00847cbaf7b6..d08718e98e11 100644
--- a/drivers/net/can/peak_canfd/peak_canfd.c
+++ b/drivers/net/can/peak_canfd/peak_canfd.c
@@ -351,8 +351,8 @@ static int pucan_handle_status(struct peak_canfd_priv *priv,
 				return err;
 		}
 
-		/* start network queue (echo_skb array is empty) */
-		netif_start_queue(ndev);
+		/* wake network queue up (echo_skb array is empty) */
+		netif_wake_queue(ndev);
 
 		return 0;
 	}
-- 
2.26.2