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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
