From mboxrd@z Thu Jan 1 00:00:00 1970 From: Adrian McMenamin Date: Sat, 26 Jan 2008 22:01:48 +0000 Subject: Re: kobject oops with maple bus Message-Id: <1201384908.6672.12.camel@localhost.localdomain> List-Id: References: <1201377200.6672.10.camel@localhost.localdomain> <20080126204402.GA30867@kroah.com> In-Reply-To: <20080126204402.GA30867@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset="windows-1254" Content-Transfer-Encoding: base64 To: Greg KH Cc: LKML , linux-sh Ck9uIFNhdCwgMjAwOC0wMS0yNiBhdCAxMjo0NCAtMDgwMCwgR3JlZyBLSCB3cm90ZToKPiBPbiBT YXQsIEphbiAyNiwgMjAwOCBhdCAwNzo1MzoyMFBNICswMDAwLCBBZHJpYW4gTWNNZW5hbWluIHdy b3RlOgo+ID4gR3JlZywKPiA+IAo+ID4gSnVzdCB1cGRhdGVkIG15IGdpdCB0byB0aGUgbGF0ZXN0 IHNvdXJjZXMgYW5kIGdldCB0aGVzZSAoc2VlbWluZ2x5IG5vbi1mYXRhbCkgb29wcyB3aXRoIHRo ZSBEcmVhbWNhc3QgbWFwbGUgYnVzLiBJJ2xsIGludmVzdGlnYXRlIGZ1cnRoZXIsIGJ1dCB0aGV5 IG1heSBtZWFuIHNvbWV0aGluZyB0byBvdXQgb3V0IG9mIHRoZSBib3guCj4gPiAKPiA+IEFkcmlh 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vger.kernel.org id S1754524AbYAZWCN (ORCPT ); Sat, 26 Jan 2008 17:02:13 -0500 Received: from mk-filter-3-a-1.mail.uk.tiscali.com ([212.74.100.54]:6560 "EHLO mk-filter-3-a-4.mail.uk.tiscali.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1754447AbYAZWCM (ORCPT ); Sat, 26 Jan 2008 17:02:12 -0500 X-Trace: 675251418/mk-filter-3.mail.uk.tiscali.com/B2C/$THROTTLED-DYNAMIC/CUSTOMER-DYNAMIC-IP/81.1.80.29 X-SBRS: None X-RemoteIP: 81.1.80.29 X-IP-MAIL-FROM: adrian@newgolddream.dyndns.info X-IP-BHB: Once X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: Ah4FAKc8m0dRAVAd/2dsb2JhbACBWKo+ Subject: Re: kobject oops with maple bus From: Adrian McMenamin To: Greg KH Cc: LKML , linux-sh In-Reply-To: <20080126204402.GA30867@kroah.com> References: <1201377200.6672.10.camel@localhost.localdomain> <20080126204402.GA30867@kroah.com> Content-Type: text/plain Date: Sat, 26 Jan 2008 22:01:48 +0000 Message-Id: <1201384908.6672.12.camel@localhost.localdomain> Mime-Version: 1.0 X-Mailer: Evolution 2.12.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat, 2008-01-26 at 12:44 -0800, Greg KH wrote: > On Sat, Jan 26, 2008 at 07:53:20PM +0000, Adrian McMenamin wrote: > > Greg, > > > > Just updated my git to the latest sources and get these (seemingly non-fatal) oops with the Dreamcast maple bus. I'll investigate further, but they may mean something to out out of the box. > > > > Adrian > > > > > > > > > > dreamy:~# [ 0.000000] Linux version 2.6.24-gf0ea9c3d-dirty (adrian@bossclass) (gcc version 3.4.6) #328 PREEMPT Sat Jan 26 19:45:30 GMT 2008 > > [ 0.000000] console [sercon0] enabled > > [ 0.000000] Booting machvec: Sega Dreamcast > > [ 0.000000] Node 0: start_pfn = 0xc000, low = 0xd000 > > [ 0.000000] Zone PFN ranges: > > [ 0.000000] Normal 49152 -> 53248 > > [ 0.000000] Movable zone start PFN for each node > > [ 0.000000] early_node_map[1] active PFN ranges > > [ 0.000000] 0: 49152 -> 53248 > > [ 0.000000] Built 1 zonelists in Zone order, mobility grouping on. Total pages: 4064 > > [ 0.000000] Kernel command line: root=/dev/nfs rw nfsroot=192.168.61.50:/home/adrian/debdist ip=dhcp earlyprintk=serial video=pvr2fb:640x480-32@60 consol7 > > [ 0.000000] PID hash table entries: 64 (order: 6, 256 bytes) > > [ 0.000000] Using tmu for system timer > > [ 0.000000] Using 12.469 MHz high precision timer. > > [ 0.000000] Console: colour dummy device 80x25 > > [ 0.000000] Dentry cache hash table entries: 2048 (order: 1, 8192 bytes) > > [ 0.000000] Inode-cache hash table entries: 1024 (order: 0, 4096 bytes) > > [ 0.000000] Memory: 13468k/16384k available (1918k kernel code, 645k data, 96k init) > > [ 0.000000] PVR=040205c1 CVR=00000000 PRR=00000000 > > [ 0.000000] I-cache : n_ways=1 n_sets=256 way_incr=8192 > > [ 0.000000] I-cache : entry_mask=0x00001fe0 alias_mask=0x00001000 n_aliases=2 > > [ 0.000000] D-cache : n_ways=1 n_sets=512 way_incr=16384 > > [ 0.000000] D-cache : entry_mask=0x00003fe0 alias_mask=0x00003000 n_aliases=4 > > [ 0.000000] SLUB: Genslabs=9, HWalign=32, Order=0-1, MinObjects=4, CPUs=1, Nodes=1 > > [ 0.000000] Mount-cache hash table entries: 512 > > [ 0.000000] CPU: SH7750 > > [ 0.000000] net_namespace: 64 bytes > > [ 0.000000] NET: Registered protocol family 16 > > [ 0.000000] Maple bus at (0, 0): Connected function 0x0 > > [ 0.000000] No maple driver found for this device > > [ 0.000000] Maple bus at (1, 0): Connected function 0x0 > > [ 0.000000] No maple driver found for this device > > [ 0.000000] Maple bus at (2, 0): Connected function 0x0 > > [ 0.000000] No maple driver found for this device > > [ 0.000000] Maple bus at (3, 0): Connected function 0x0 > > [ 0.000000] No maple driver found for this device > > [ 0.000000] Maple bus core now registered. > > [ 0.000000] DMA: Registering DMA API. > > [ 0.000000] DMA: Registering sh_dmac handler (4 channels). > > [ 0.000000] Maple bus at (0, 0): Connected function 0x1 > > [ 0.000000] No maple driver found for this device > > [ 0.000000] kobject (8cc2d360): tried to init an initialized object, something is seriously wrong. > > The problem is here. You have possibly already initialized this object, > or called 'kobject_get' on it before registering it with the driver > core. This is a new sanity check that has been in the -mm tree for > years :) > > So I think something needs to be fixed in the code. Do you want me to > take a look at it? > I think it is probably registering the "dummy" driver a second or further time. Does that make sense? By all means have a look, but I'll have a go - I'm sure you have better things to do than mess about with Dreamcast code :)