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2013-09-26 20:48 <apelete> Hello
2013-09-26 20:48 <apelete> larsc mth: are you there ?
2013-09-26 20:49 <apelete> I'm trying to debug a kernel issue in the jz4740 musb driver
2013-09-26 20:51 <apelete> gdb log: http://paste.debian.net/46591/
2013-09-26 20:51 <apelete> jz4740 musb code: http://paste.debian.net/46592/
2013-09-26 20:52 <apelete> according to gdb log, driver got stuck in platform_set_drvdata()
2013-09-26 20:52 <apelete> but I can't tell why, I don't see anything suspicious
2013-09-26 20:54 <apelete> larsc mth: could you please tell me what's wrong in there ?
2013-09-26 20:54 <mth> I'll try, looking at the code now
2013-09-26 20:55 <apelete> thanks
2013-09-26 21:00 <larsc> I don't think it is possible to get stuck in platform_set_drvdata
2013-09-26 21:05 <mth> yeah, there is no loop there, so it should always exit
2013-09-26 21:06 <mth> clk_put is not necessary if you acquired it with devm_clk_get
2013-09-26 21:09 <apelete> ok
2013-09-26 21:09 <mth> but I don't see anything obviously wrong
2013-09-26 21:10 <apelete> mth: so what's wrong in the code then ? how come the kernel is panicking ?
2013-09-26 21:10 <apelete> <mth> but I don't see anything obviously wrong
2013-09-26 21:10 <apelete> I still have gdb running right now
2013-09-26 21:11 <apelete> mth: I can print some variables if you suspect something, and paste it so you can see
2013-09-26 21:11 <mth> where does that SIGHUP come from?
2013-09-26 21:12 <apelete> good question, I don't really see where it might come from
2013-09-26 21:13 <mth> I mean, why does the debugger stop there, something must have triggered it?
2013-09-26 21:14 <mth> does the kernel get stuck as well if you boot it without the debugger?
2013-09-26 21:14 <mth> and if so, what is the last thing that it logs?
2013-09-26 21:14 <mth> I tend to debug with logging rather than interactive debuggers most of the time; I still mistrust debuggers from my Turbo Pascal days
2013-09-26 21:15 <apelete> ok I'll recompile it right away without the debugger option and see what happens
2013-09-26 21:15 <viric> gdb isn't that bad :)
2013-09-26 21:19 <apelete> I need it to understand how the usb code works (looking at the call stack and printing variables, and so on)
2013-09-26 21:19 <apelete> but I will disable it just for now to see what happens
2013-09-26 21:28 <mth> viric: a big part of the problem was that the Turbo Pascal IDE ran in the same process as the program being debugged, so if you had any memory corruption the debugger itself or the data it was operating on could be invalidated
2013-09-26 21:29 <mth> gdb is more reliable, but still there are situations in which it is feeding nonsense
2013-09-26 21:31 <pcercuei> and it's generally a bad idea to trust blindly a program
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2013-09-26 21:52 <apelete> mth: I'm recompiling, should get the log soon
2013-09-26 21:52 <apelete> meanwhile, what does that SIGHUP means in kernel context ?
2013-09-26 21:59 <apelete> mth: boot log -> http://paste.debian.net/46609/
2013-09-26 21:59 <apelete> not very helpful if you ask me :)
2013-09-26 22:01 <qi-bot> [commit] Paul Cercueil: Remove calls to sync() (master) http://qi-hw.com/p/gmenu2x/8452c03
2013-09-26 22:01 <qi-bot> [commit] Paul Cercueil: Remove calls to setInputSpeed(), as it only needs to be called once (master) http://qi-hw.com/p/gmenu2x/217a9b5
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