Messages in this thread | | | Subject | Re: w1: 3.14-rc7 - possible recursive locking detected | From | "Dr. H. Nikolaus Schaller" <> | Date | Mon, 24 Mar 2014 06:55:51 +0100 |
| |
Hi,
Am 23.03.2014 um 22:50 schrieb David Fries:
> On Mon, Mar 17, 2014 at 10:38:13PM +0100, Belisko Marek wrote: >> Hi, >> >> booting latest 3.14-rc7 on gta04 board gives following warning: >> >> [ 3.101409] Driver for 1-wire Dallas network protocol. >> [ 3.109649] omap_hdq omap_hdq: OMAP HDQ Hardware Rev 0.5. Driver in >> [ 3.400146] CPU0 >> [ 3.402709] ---- >> [ 3.405273] lock(&(&priv->bus_notifier)->rwsem); >> [ 3.410308] lock(&(&priv->bus_notifier)->rwsem); >> [ 3.415374] >> [ 3.415374] *** DEADLOCK *** >> >> AFAIK we didn't see that on (at least 3/14-rc2). > > The last drivers/w1 change went in before v3.14-rc1, so if it is > something in the w1 code, it has either been there or something else > in the rest of the kernel changed to expose it. I'm using the ds2490 > USB w1 dongle, I didn't see that problem when enabling lock debugging > on 3.14.0-rc5+ which includes some changes I'm working on. > > https://github.com/dfries/linux.git w1_rework
Further analysis shows that It only occurs when using the device tree.
So it may have to do something with nested driver probing/locking running differently between DT and board file.
BR, Nikolaus
| |