Messages in this thread Patch in this message | | | From | Ben Hutchings <> | Date | Mon, 18 Jan 2016 03:18:35 +0000 | Subject | [PATCH 3.2 14/70] ser_gigaset: fix deallocation of platform device structure |
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3.2.76-rc1 review patch. If anyone has any objections, please let me know.
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From: Tilman Schmidt <tilman@imap.cc>
commit 4c5e354a974214dfb44cd23fa0429327693bc3ea upstream.
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 <tilman@imap.cc> Fixes: 2869b23e4b95 ("drivers/isdn/gigaset: new M101 driver (v2)") Reported-by: Sasha Levin <sasha.levin@oracle.com> Signed-off-by: Paul Bolle <pebolle@tiscali.nl> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Ben Hutchings <ben@decadent.org.uk> --- drivers/isdn/gigaset/ser-gigaset.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-)
--- a/drivers/isdn/gigaset/ser-gigaset.c +++ b/drivers/isdn/gigaset/ser-gigaset.c @@ -371,19 +371,23 @@ static void gigaset_freecshw(struct card 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; } /*
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