From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ingo Molnar Subject: Re: [crash, bisected] I2C, kobject (ffff81003e8c4160): tried to init an initialized object Date: Thu, 17 Jul 2008 11:49:30 +0200 Message-ID: <20080717094930.GA9044@elte.hu> References: <20080714224945.629446fa@hyperion.delvare> <20080716082352.GA30483@elte.hu> <20080716110702.3ca61eb2@hyperion.delvare> <20080716120801.3e9b4c80@hyperion.delvare> <20080716141826.1d88d05e@hyperion.delvare> <20080717092655.GA6115@elte.hu> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: <20080717092655.GA6115-X9Un+BFzKDI@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: i2c-bounces-GZX6beZjE8VD60Wz+7aTrA@public.gmane.org Errors-To: i2c-bounces-GZX6beZjE8VD60Wz+7aTrA@public.gmane.org To: Jean Delvare Cc: Ulrich Drepper , john stultz , Greg KH , LKML , Linux I2C List-Id: linux-i2c@vger.kernel.org * Ingo Molnar wrote: > -tip testing found another (similar) i2c crash with latest -git, on a > Core2Duo laptop: found another bootup crash on an Athlon 64 X2 testsystem: [ 19.610000] bus: 'pci': add driver amd756_smbus [ 19.615204] initcall amd756_init+0x0/0x20 returned 0 after 9 msecs [ 19.620000] calling amd756_s4882_init+0x0/0x2d7 [ 19.624242] ------------[ cut here ]------------ [ 19.628415] WARNING: at kernel/mutex.c:134 mutex_lock_nested+0xc0/0x267() [ 19.630000] Pid: 1, comm: swapper Not tainted 2.6.26-tip #20066 [ 19.630000] [ 19.630000] Call Trace: [ 19.630000] [] warn_on_slowpath+0x58/0x7f [ 19.630000] [] ? ftrace_record_ip+0x20c/0x263 [ 19.630000] [] ? _raw_spin_unlock+0x8e/0x93 [ 19.630000] [] ? debug_locks_off+0x4/0x3c [ 19.630000] [] ? ftrace_record_ip+0x20c/0x263 [ 19.630000] [] ? mcount_call+0x5/0x31 [ 19.630000] [] mutex_lock_nested+0xc0/0x267 [ 19.630000] [] ? i2c_smbus_xfer+0x59/0x49c [ 19.630000] [] ? amd756_s4882_init+0x0/0x2d7 [ 19.630000] [] ? mcount_call+0x5/0x31 [ 19.630000] [] i2c_smbus_xfer+0x59/0x49c [ 19.630000] [] ? ftrace_record_ip+0x20c/0x263 [ 19.630000] [] ? _raw_spin_unlock+0x8e/0x93 [ 19.630000] [] ? amd756_s4882_init+0xf/0x2d7 [ 19.630000] [] ? ftrace_record_ip+0x20c/0x263 [ 19.630000] [] ? amd756_s4882_init+0x0/0x2d7 [ 19.630000] [] ? mcount_call+0x5/0x31 [ 19.630000] [] ? amd756_s4882_init+0x0/0x2d7 [ 19.630000] [] amd756_s4882_init+0x41/0x2d7 [ 19.630000] [] ? getnstimeofday+0x3f/0xa1 [ 19.630000] [] ? ktime_get_ts+0x4e/0x53 [ 19.630000] [] ? amd756_s4882_init+0x0/0x2d7 [ 19.630000] [] kernel_init+0x143/0x2a4 [ 19.630000] [] ? _spin_unlock_irq+0x2b/0x37 [ 19.630000] [] child_rip+0xa/0x11 [ 19.630000] [] ? kernel_init+0x0/0x2a4 [ 19.630000] [] ? child_rip+0x0/0x11 [ 19.630000] [ 19.630000] ---[ end trace 0e79313125261797 ]--- [ 19.630000] BUG: unable to handle kernel NULL pointer dereference at 0000000000000000 [ 19.630000] IP: [] mutex_lock_nested+0x10d/0x267 with this config: http://redhat.com/~mingo/misc/config-Thu_Jul_17_11_34_08_CEST_2008.bad i already had I2C_NFORCE2_S4985 off here, so it's a different one. Ingo _______________________________________________ i2c mailing list i2c-GZX6beZjE8VD60Wz+7aTrA@public.gmane.org http://lists.lm-sensors.org/mailman/listinfo/i2c