From: Akihiro TSUKADA <tskd08@gmail.com>
To: Benjamin Larsson <benjamin@southpole.se>,
linux-media@vger.kernel.org, Antti Palosaari <crope@iki.fi>
Subject: Re: Random memory corruption of fe[1]->dvb pointer
Date: Tue, 02 Dec 2014 18:47:12 +0900 [thread overview]
Message-ID: <547D8AA0.4000403@gmail.com> (raw)
In-Reply-To: <547CF9FC.5010101@southpole.se>
> So at first it would be nice if someone could confirm my findings.
> Applying the same kind of code like my patch and unplug something that
> uses the affected frontend should be enough.
I tried that for tc90522, and I could remove earth-pt3
(which uses tc90522), tc90522 and tuner modules without any problem,
although earth-pt3 is a pci driver and does not use dvb-usb-v2.
>From your log(?) output,
I guess that rtl28xxu_exit() removed the attached demod module
(mn88472) and thus free'ed fe BEFORE calling dvb_usbv2_exit(),
from where dvb_unregister_frontend(fe) is called.
I think that the demod i2c device is removed automatically by
dvb_usbv2_i2c_exit() in dvb_usbv2_exit(), if you registered
the demod i2c device, and your adapter/bridge driver
should not try to remove it.
regards,
Akihiro
next prev parent reply other threads:[~2014-12-02 9:47 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-30 23:47 Random memory corruption of fe[1]->dvb pointer Benjamin Larsson
2014-12-01 23:30 ` Benjamin Larsson
2014-12-02 9:47 ` Akihiro TSUKADA [this message]
2014-12-02 10:02 ` Antti Palosaari
2014-12-02 10:41 ` Benjamin Larsson
2014-12-02 10:59 ` Antti Palosaari
2014-12-02 11:52 ` Benjamin Larsson
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