From 4c5e354a974214dfb44cd23fa0429327693bc3ea Mon Sep 17 00:00:00 2001 From: Tilman Schmidt Date: Tue, 15 Dec 2015 18:11:30 +0100 Subject: [PATCH] ser_gigaset: fix deallocation of platform device structure When shutting down the device, the struct ser_cardstate must not be kfree()d immediately after the call to platform_device_unregister() since the embedded struct platform_device is still in use. Move the kfree() call to the release method instead. Signed-off-by: Tilman Schmidt Fixes: 2869b23e4b95 ("drivers/isdn/gigaset: new M101 driver (v2)") Reported-by: Sasha Levin Signed-off-by: Paul Bolle Signed-off-by: David S. Miller --- drivers/isdn/gigaset/ser-gigaset.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/drivers/isdn/gigaset/ser-gigaset.c b/drivers/isdn/gigaset/ser-gigaset.c index 8e21f6afa832..635baaf34e95 100644 --- a/drivers/isdn/gigaset/ser-gigaset.c +++ b/drivers/isdn/gigaset/ser-gigaset.c @@ -368,19 +368,23 @@ static void gigaset_freecshw(struct cardstate *cs) tasklet_kill(&cs->write_tasklet); if (!cs->hw.ser) return; - dev_set_drvdata(&cs->hw.ser->dev.dev, NULL); platform_device_unregister(&cs->hw.ser->dev); - kfree(cs->hw.ser); - cs->hw.ser = NULL; } static void gigaset_device_release(struct device *dev) { struct platform_device *pdev = to_platform_device(dev); + struct cardstate *cs = dev_get_drvdata(dev); /* adapted from platform_device_release() in drivers/base/platform.c */ kfree(dev->platform_data); kfree(pdev->resource); + + if (!cs) + return; + dev_set_drvdata(dev, NULL); + kfree(cs->hw.ser); + cs->hw.ser = NULL; } /* -- 2.20.1