Paul Bolle 6b3d1619c1 ser_gigaset: use container_of() instead of detour ... [ Upstream commit 8d2c3ab444 ] The purpose of gigaset_device_release() is to kfree() the struct ser_cardstate that contains our struct device. This is done via a bit of a detour. First we make our struct device's driver_data point to the container of our struct ser_cardstate (which is a struct cardstate). In gigaset_device_release() we then retrieve that driver_data again. And after that we finally kfree() the struct ser_cardstate that was saved in the struct cardstate. All of this can be achieved much easier by using container_of() to get from our struct device to its container, struct ser_cardstate. Do so. Note that at the time the detour was implemented commit b8b2c7d845 ("base/platform: assert that dev_pm_domain callbacks are called unconditionally") had just entered the tree. That commit disconnected our platform_device and our platform_driver. These were reconnected again in v4.5-rc2 through commit 25cad69f21 ("base/platform: Fix platform drivers with no probe callback"). And one of the consequences of that fix was that it broke the detour via driver_data. That's because it made __device_release_driver() stop being a NOP for our struct device and actually do stuff again. One of the things it now does, is setting our driver_data to NULL. That, in turn, makes it impossible for gigaset_device_release() to get to our struct cardstate. Which has the net effect of leaking a struct ser_cardstate at every call of this driver's tty close() operation. So using container_of() has the additional benefit of actually working. Reported-by: Dmitry Vyukov <dvyukov@google.com> Tested-by: Dmitry Vyukov <dvyukov@google.com> Signed-off-by: Paul Bolle <pebolle@tiscali.nl> Acked-by: Tilman Schmidt <tilman@imap.cc> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Sasha Levin <sashal@kernel.org>		2018-11-10 07:41:34 -08:00
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act2000
capi	isdn: kcapi: avoid uninitialized data	2017-12-25 14:22:13 +01:00
divert
gigaset	ser_gigaset: use container_of() instead of detour	2018-11-10 07:41:34 -08:00
hardware	isdn: eicon: fix a missing-check bug	2018-06-13 16:15:28 +02:00
hisax	isdn: Partially revert debug format string usage clean up	2015-11-25 11:49:58 -05:00
hysdn
i4l	isdn: Disable IIOCDBGVAR	2018-08-22 07:48:38 +02:00
icn	isdn: icn: remove a #warning	2018-02-25 11:03:42 +01:00
isdnloop
mISDN	mISDN: Fix a sleep-in-atomic bug	2018-04-13 19:50:16 +02:00
pcbit
sc	isdn: sc: work around type mismatch warning	2018-02-25 11:03:51 +01:00
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