From: Chris Rankin <rankincj@yahoo.com>
To: Mauro Carvalho Chehab <mchehab@redhat.com>
Cc: Devin Heitmueller <dheitmueller@kernellabs.com>,
linux-media@vger.kernel.org, Antti Palosaari <crope@iki.fi>
Subject: [PATCH 1/1] EM28xx - fix deadlock when unplugging and replugging a DVB adapter
Date: Sat, 20 Aug 2011 23:38:00 +0100 [thread overview]
Message-ID: <4E503748.1090309@yahoo.com> (raw)
In-Reply-To: <4E4FCC8D.3070305@redhat.com>
[-- Attachment #1: Type: text/plain, Size: 251 bytes --]
Here's the new patch for the deadlock problem, which releases the device mutex
before calling em28xx_init_extension() and then reacquires it afterwards. The
locking in dvb_init() is now left alone.
Signed-off-by: Chris Rankin <rankincj@yahoo.com>
[-- Attachment #2: EM28xx-replug-deadlock.diff --]
[-- Type: text/x-patch, Size: 447 bytes --]
--- linux-3.0/drivers/media/video/em28xx/em28xx-cards.c.orig 2011-08-19 00:45:48.000000000 +0100
+++ linux-3.0/drivers/media/video/em28xx/em28xx-cards.c 2011-08-20 23:28:39.000000000 +0100
@@ -2929,7 +2929,9 @@
goto fail_reg_analog_devices;
}
+ mutex_unlock(&dev->lock);
em28xx_init_extension(dev);
+ mutex_lock(&dev->lock);
/* Save some power by putting tuner to sleep */
v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_power, 0);
next prev parent reply other threads:[~2011-08-20 22:38 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-08-18 17:52 [PATCH] Latest version of em28xx / em28xx-dvb patch for PCTV 290e Chris Rankin
2011-08-18 18:43 ` Devin Heitmueller
2011-08-18 18:44 ` Devin Heitmueller
2011-08-18 21:34 ` Chris Rankin
2011-08-18 22:11 ` Chris Rankin
2011-08-19 5:53 ` Mauro Carvalho Chehab
2011-08-20 11:08 ` [PATCH 1/6 ] EM28xx - pass correct buffer size to snprintf Chris Rankin
2011-08-20 11:14 ` [PATCH 2/6] Fix memory leak on disconnect or error Chris Rankin
2011-08-20 11:21 ` [PATCH 3/6] EM28xx - use atomic bit operations for devices-in-use mask Chris Rankin
2011-08-20 11:28 ` [PATCH 4/6] EM28xx - clean up resources should init fail Chris Rankin
2011-08-20 11:31 ` [PATCH 5/6] EM28xx - move printk lines outside mutex lock Chris Rankin
2011-08-20 11:37 ` [PATCH 6/6] EM28xx - don't sleep on disconnect Chris Rankin
2011-08-20 12:17 ` Mauro Carvalho Chehab
2011-08-20 13:46 ` Chris Rankin
2011-08-20 14:20 ` Mauro Carvalho Chehab
2011-08-20 19:01 ` Chris Rankin
2011-08-20 11:42 ` [PATCH 1/2] EM28xx - fix race " Chris Rankin
2011-08-20 12:36 ` Sylwester Nawrocki
2011-08-20 11:46 ` [PATCH 2/2] EM28xx - fix deadlock when unplugging and replugging a DVB adapter Chris Rankin
2011-08-20 12:34 ` Mauro Carvalho Chehab
2011-08-20 14:40 ` Chris Rankin
2011-08-20 15:02 ` Mauro Carvalho Chehab
2011-08-20 22:38 ` Chris Rankin [this message]
2011-08-21 12:32 ` [PATCH 1/1] " Chris Rankin
2011-09-13 20:04 ` Antti Palosaari
2011-09-13 20:47 ` Chris Rankin
2011-08-18 22:28 ` [PATCH] Latest version of em28xx / em28xx-dvb patch for PCTV 290e Chris Rankin
2011-08-18 23:45 ` Chris Rankin
2011-08-19 0:12 ` Chris Rankin
2011-08-18 19:56 ` Chris Rankin
2011-08-19 1:01 ` Mauro Carvalho Chehab
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