From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Kamal Mostafa To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, kernel-team@lists.ubuntu.com Cc: Viktor Babrian , Marc Kleine-Budde , Kamal Mostafa Subject: [PATCH 3.13.y-ckt 32/80] can: c_can: end pending transmission on network stop (ifdown) Date: Thu, 19 Mar 2015 15:35:20 -0700 Message-Id: <1426804568-2907-33-git-send-email-kamal@canonical.com> In-Reply-To: <1426804568-2907-1-git-send-email-kamal@canonical.com> References: <1426804568-2907-1-git-send-email-kamal@canonical.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: 3.13.11-ckt17 -stable review patch. If anyone has any objections, please let me know. ------------------ From: Viktor Babrian commit 7ffd7b4e169d619e66928fe5d997723f2c6f1056 upstream. Put controller into init mode in network stop to end pending transmissions. The issue is observed in cases when transmitted frame is not acked. Signed-off-by: Viktor Babrian Signed-off-by: Marc Kleine-Budde [ kamal: backport to 3.13-stable: context ] Signed-off-by: Kamal Mostafa --- drivers/net/can/c_can/c_can.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/net/can/c_can/c_can.c b/drivers/net/can/c_can/c_can.c index 77061ee..4b17cd6 100644 --- a/drivers/net/can/c_can/c_can.c +++ b/drivers/net/can/c_can/c_can.c @@ -694,6 +694,9 @@ static void c_can_stop(struct net_device *dev) /* disable all interrupts */ c_can_enable_all_interrupts(priv, DISABLE_ALL_INTERRUPTS); + /* put ctrl to init on stop to end ongoing transmission */ + priv->write_reg(priv, C_CAN_CTRL_REG, CONTROL_INIT); + /* set the state as STOPPED */ priv->can.state = CAN_STATE_STOPPED; } -- 1.9.1