Bug 10317 - firewire: panic in ohci_cancel_packet
Summary: firewire: panic in ohci_cancel_packet
Status: CLOSED CODE_FIX
Alias: None
Product: Drivers
Classification: Unclassified
Component: IEEE1394 (show other bugs)
Hardware: All Linux
: P1 normal
Assignee: Stefan Richter
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2008-03-24 12:06 UTC by Stefan Richter
Modified: 2008-07-29 16:18 UTC (History)
1 user (show)

See Also:
Kernel Version: 2.6.25-rc6 + firewire development patches
Subsystem:
Regression: ---
Bisected commit-id:

Attachments
panic screenshot (90.64 KB, image/jpeg)
2008-03-24 12:07 UTC, Stefan Richter 		Details
panic screenshot (177.65 KB, image/jpeg)
2008-03-24 12:23 UTC, Stefan Richter 		Details
Show Obsolete (1) Add an attachment (proposed patch, testcase, etc.)

Description Stefan Richter 2008-03-24 12:06:25 UTC 
hard to reproduce panic:
 - plugged in two bus powered hubs into PC
 - got panic in ohci_cancel_packet,
   called by fw_flush_transactions,
   called by fw_core_handle_bus_reset,
   while or right after handle_ar_packet

screenshot follows
Comment 1 Stefan Richter 2008-03-24 12:07:54 UTC 
Created attachment 15415 [details]
panic screenshot
Comment 2 Stefan Richter 2008-03-24 12:23:52 UTC 
Created attachment 15416 [details]
panic screenshot
Comment 3 Jarod Wilson 2008-03-24 14:46:50 UTC 
I've hit this panic once or twice w/my crappy jmicron controller.
Comment 4 Stefan Richter 2008-07-13 11:56:29 UTC 
Maybe this is caused by the race condition described by Jay on IRC.
Patch: "firewire: fix race of bus reset with request transmission"
http://lkml.org/lkml/2008/7/12/68
belongs to patch series http://lkml.org/lkml/2008/7/12/66
Comment 5 Stefan Richter 2008-07-29 16:18:50 UTC 
Mentioned patch has been merged in 2.6.27-rc1:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=792a61021c6043f6c2b24b1cdd42be5753b3e54c
I presume it fixes this bug.
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