* Re: [BUG] OHCI crash when handover fails [not found] <1306454011.7481.529.camel@pasglop> @ 2011-05-27 1:02 ` Benjamin Herrenschmidt 2011-05-30 16:25 ` Sebastian Andrzej Siewior 0 siblings, 1 reply; 4+ messages in thread From: Benjamin Herrenschmidt @ 2011-05-27 1:02 UTC (permalink / raw) To: linux-usb@vger.kernel.org; +Cc: Alan Stern, linux-kernel@vger.kernel.org On Fri, 2011-05-27 at 09:53 +1000, Benjamin Herrenschmidt wrote: > Hi folks ! > > Current upstream, POWER7 machine running bare metal, there's no BIOS at > all, so the whole handover failing thing is an oddity in the first place > which I haven't tracked down yet, but it should cause that crash: BTW. The same handover failure didn't cause a crash yesterday, so this is a regression that happened with whatever Linus pulled last night, I probably won't have a chance to bisect it tho for various reasons. Cheers, Ben. > ohci_hcd 0000:07:02.0: OHCI Host Controller > ohci_hcd 0000:07:02.0: new USB bus registered, assigned bus number 4 > ohci_hcd 0000:07:02.0: USB HC takeover failed! (BIOS/SMM bug) > ohci_hcd 0000:07:02.0: can't setup > ohci_hcd 0000:07:02.0: USB bus 4 deregistered > ------------[ cut here ]------------ > kernel BUG at /home/benh/linux-impreza/fs/dcache.c:419! > cpu 0x0: Vector: 700 (Program Check) at [c0000003dbb9b580] > pc: c00000000014848c: .dput+0x50/0x26c > lr: c00000000014847c: .dput+0x40/0x26c > sp: c0000003dbb9b800 > msr: 9000000000029032 > current = 0xc0000003dbc6cec0 > paca = 0xc00000000ff88000 > pid = 2185, comm = work_for_cpu > kernel BUG at /home/benh/linux-impreza/fs/dcache.c:419! > enter ? for help > [c0000003dbb9b800] c000000000148674 .dput+0x238/0x26c (unreliable) > [c0000003dbb9b8a0] c0000000004bfd44 .fs_remove_file+0x278/0x2dc > [c0000003dbb9b970] c0000000004c0374 .usbfs_notify+0x258/0x2e0 > [c0000003dbb9ba20] c000000000602498 .notifier_call_chain+0x6c/0xe0 > [c0000003dbb9bac0] c00000000008ffd4 .__blocking_notifier_call_chain > +0x60/0x90 > [c0000003dbb9bb70] c0000000004bde70 .usb_notify_remove_bus+0x24/0x3c > [c0000003dbb9bbf0] c0000000004af760 .usb_deregister_bus+0x80/0xe0 > [c0000003dbb9bc80] c0000000004b1274 .usb_add_hcd+0x6ec/0x750 > [c0000003dbb9bd40] c0000000004bf284 .usb_hcd_pci_probe+0x1e0/0x2b0 > [c0000003dbb9bde0] c000000000304ccc .local_pci_probe+0x34/0x48 > [c0000003dbb9be50] c0000000000809ac .do_work_for_cpu+0x34/0x60 > [c0000003dbb9bed0] c00000000008975c .kthread+0xb0/0xbc > [c0000003dbb9bf90] c00000000001ce98 .kernel_thread+0x54/0x70 > 0:mon> > > > Cheers, > Ben. ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [BUG] OHCI crash when handover fails 2011-05-27 1:02 ` [BUG] OHCI crash when handover fails Benjamin Herrenschmidt @ 2011-05-30 16:25 ` Sebastian Andrzej Siewior 2011-06-02 7:58 ` Benjamin Herrenschmidt 0 siblings, 1 reply; 4+ messages in thread From: Sebastian Andrzej Siewior @ 2011-05-30 16:25 UTC (permalink / raw) To: Benjamin Herrenschmidt Cc: linux-usb@vger.kernel.org, Alan Stern, linux-kernel@vger.kernel.org * Benjamin Herrenschmidt | 2011-05-27 11:02:48 [+1000]: >BTW. The same handover failure didn't cause a crash yesterday, so this >is a regression that happened with whatever Linus pulled last night, I >probably won't have a chance to bisect it tho for various reasons. Ben, this is probably fixed by http://marc.info/?l=linux-fsdevel&m=130676974227377&w=2 >Cheers, >Ben. Sebastian ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [BUG] OHCI crash when handover fails 2011-05-30 16:25 ` Sebastian Andrzej Siewior @ 2011-06-02 7:58 ` Benjamin Herrenschmidt 2011-06-03 17:43 ` Sebastian Andrzej Siewior 0 siblings, 1 reply; 4+ messages in thread From: Benjamin Herrenschmidt @ 2011-06-02 7:58 UTC (permalink / raw) To: Sebastian Andrzej Siewior Cc: linux-usb@vger.kernel.org, Alan Stern, linux-kernel@vger.kernel.org On Mon, 2011-05-30 at 18:25 +0200, Sebastian Andrzej Siewior wrote: > * Benjamin Herrenschmidt | 2011-05-27 11:02:48 [+1000]: > > >BTW. The same handover failure didn't cause a crash yesterday, so this > >is a regression that happened with whatever Linus pulled last night, I > >probably won't have a chance to bisect it tho for various reasons. > > Ben, this is probably fixed by > http://marc.info/?l=linux-fsdevel&m=130676974227377&w=2 Sorry for the delay testing, got bogged down by more 3.0-* regressions :-( The patch does indeed fix the problem for me. I noticed that it's still not upstream tho :-) Can you send it to Linus asap ? Cheers, Ben. ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [BUG] OHCI crash when handover fails 2011-06-02 7:58 ` Benjamin Herrenschmidt @ 2011-06-03 17:43 ` Sebastian Andrzej Siewior 0 siblings, 0 replies; 4+ messages in thread From: Sebastian Andrzej Siewior @ 2011-06-03 17:43 UTC (permalink / raw) To: Benjamin Herrenschmidt Cc: linux-usb@vger.kernel.org, Alan Stern, linux-kernel@vger.kernel.org * Benjamin Herrenschmidt | 2011-06-02 17:58:26 [+1000]: >The patch does indeed fix the problem for me. I noticed that it's still >not upstream tho :-) There is another version of the patch pending. I hope Greg picks it but he is in .jp as far as I can see on lwn so it may take a while. >Can you send it to Linus asap ? The problem should go away for you if you disable CONFIG_USB_DEVICEFS :) Nobody in userland should actually use this. udev and friends migrated to the /sys interface. >Cheers, >Ben. Sebastian ^ permalink raw reply [flat|nested] 4+ messages in thread
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[not found] <1306454011.7481.529.camel@pasglop>
2011-05-27 1:02 ` [BUG] OHCI crash when handover fails Benjamin Herrenschmidt
2011-05-30 16:25 ` Sebastian Andrzej Siewior
2011-06-02 7:58 ` Benjamin Herrenschmidt
2011-06-03 17:43 ` Sebastian Andrzej Siewior
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