| Message ID | 20200825055442.16994-1-faiz_abbas@ti.com |
|---|---|
| State | New |
| Headers | show |
| Series | [v2] can: m_can: Set device to software init mode before closing | expand |
On 8/25/20 7:54 AM, Faiz Abbas wrote: > There might be some requests pending in the buffer when the > interface close sequence occurs. In some devices, these > pending requests might lead to the module not shutting down > properly when m_can_clk_stop() is called. > > Therefore, move the device to init state before potentially > powering it down. > > Signed-off-by: Faiz Abbas <faiz_abbas@ti.com> Added to linux-can/testing. Tnx, Marc -- Pengutronix e.K. | Marc Kleine-Budde | Embedded Linux | https://www.pengutronix.de | Vertretung West/Dortmund | Phone: +49-231-2826-924 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
diff --git a/drivers/net/can/m_can/m_can.c b/drivers/net/can/m_can/m_can.c index 02c5795b7393..d0c458f7f6e1 100644 --- a/drivers/net/can/m_can/m_can.c +++ b/drivers/net/can/m_can/m_can.c @@ -1414,6 +1414,9 @@ static void m_can_stop(struct net_device *dev) /* disable all interrupts */ m_can_disable_all_interrupts(cdev); + /* Set init mode to disengage from the network */ + m_can_config_endisable(cdev, true); + /* set the state as STOPPED */ cdev->can.state = CAN_STATE_STOPPED; }
There might be some requests pending in the buffer when the interface close sequence occurs. In some devices, these pending requests might lead to the module not shutting down properly when m_can_clk_stop() is called. Therefore, move the device to init state before potentially powering it down. Signed-off-by: Faiz Abbas <faiz_abbas@ti.com> --- changes since v1: Rebased to latest mainline drivers/net/can/m_can/m_can.c | 3 +++ 1 file changed, 3 insertions(+)