[PATCH 5.9 057/255] can: flexcan: flexcan_remove(): disable wakeup completely

Greg Kroah-Hartman
2020-11-17T13:50:49Z

From: Joakim Zhang <qiangqing.zhang@nxp.com>

[ Upstream commit ab07ff1c92fa60f29438e655a1b4abab860ed0b6 ]

With below sequence, we can see wakeup default is enabled after re-load module,
if it was enabled before, so we need disable wakeup in flexcan_remove().

| # cat /sys/bus/platform/drivers/flexcan/5a8e0000.can/power/wakeup
| disabled
| # echo enabled > /sys/bus/platform/drivers/flexcan/5a8e0000.can/power/wakeup
| # cat /sys/bus/platform/drivers/flexcan/5a8e0000.can/power/wakeup
| enabled
| # rmmod flexcan
| # modprobe flexcan
| # cat /sys/bus/platform/drivers/flexcan/5a8e0000.can/power/wakeup
| enabled

Fixes: de3578c198c6 ("can: flexcan: add self wakeup support")
Fixes: 915f9666421c ("can: flexcan: add support for DT property 'wakeup-source'")
Signed-off-by: Joakim Zhang <qiangqing.zhang@nxp.com>
Link: https://lore.kernel.org/r/20201020184527.8190-1-qiangqing.zhang@nxp.com
[mkl: streamlined commit message]
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/can/flexcan.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/drivers/net/can/flexcan.c b/drivers/net/can/flexcan.c
index bc504e09f2259..a330d6c56242e 100644
--- a/drivers/net/can/flexcan.c
+++ b/drivers/net/can/flexcan.c
@@ -1695,6 +1695,8 @@ static int flexcan_remove(struct platform_device *pdev)
{
struct net_device *dev = platform_get_drvdata(pdev);

+ device_set_wakeup_enable(&pdev->dev, false);
+ device_set_wakeup_capable(&pdev->dev, false);
unregister_flexcandev(dev);
pm_runtime_disable(&pdev->dev);
free_candev(dev);
--
2.27.0