[PATCH 0/1] radio-mr800: fix unplug

From: Alexey Klimov <klimov.linux@gmail.com>
To: video4linux-list@redhat.com
Cc: Mauro Carvalho Chehab <mchehab@redhat.com>
Subject: [PATCH 0/1] radio-mr800: fix unplug
Date: Wed, 19 Nov 2008 03:35:55 +0300	[thread overview]
Message-ID: <1227054955.2389.32.camel@tux.localhost> (raw)

Hello, all

This patch fix such thing. When you listening the radio with you
user-space application(kradio/gnomeradio/mplayer/etc) and suddenly you
unplug the device from usb port and then close application or change
frequency of the radio - a lot of oopses appear in dmesg. I also had big
problems with stability of kernel(different memory leaks, lockings) in
~30% of cases when using mplayer trying to reproduce this bug.

This thing happens with dsbr100 radio and radio-mr800. I told about this
thing to Douglas Schilling Landgraf and then he suggested right decision
for dsbr100. He told me that he get ideas of preventing this bug from
Tobias radio-si470x driver. Hopefully this bug didn't show up in
radio-si470x. Well, i used Douglas suggestion and code of si470x and
made this patch.

Douglas said that he's going to create patch for dsbr100.

Patch places a lof of safety checks in functions, adds disconnect_lock
mutex and changes disconnect and release functions of module. May be
it's good to add it to 2.6.28 because it fixes an issue.
I tested this thing under 2.6.28-rc5.

-- 
Best regards, Klimov Alexey

--
video4linux-list mailing list
Unsubscribe mailto:video4linux-list-request@redhat.com?subject=unsubscribe
https://www.redhat.com/mailman/listinfo/video4linux-list