Message-ID: <20120806101200.GJ17551@arwen.pp.htv.fi>
Date:	Mon, 6 Aug 2012 13:12:01 +0300
From:	Felipe Balbi <balbi@...com>
To:	Peiyong Feng <peiyong.feng.kernel@...il.com>
Cc:	balbi@...com, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Lukasz Majewski <l.majewski@...sung.com>
Subject: Re: [BUG] Kernel panic when try s3c-hsotg.c with kernel 3.5

Hi,

On Mon, Aug 06, 2012 at 06:12:05PM +0800, Peiyong Feng wrote:
> I got a kernel panic when try hsotg of ok6410 which is based on s3c6410:
> 
> 
> cdc_acm: USB Abstract Control Model driver for USB modems and ISDN adapters
> Unable to handle kernel NULL pointer dereference at virtual address 00000100
> pgd = c0004000
> [00000100] *pgd=00000000
> Internal error: Oops: 5 [#1] ARM
> Modules linked in:
> CPU: 0    Not tainted  (3.5.0 #9)
> PC is at s3c_hsotg_handle_outdone+0x44/0x158
> LR is at s3c_hsotg_irq+0x75c/0x804
> pc : [<c023e7fc>]    lr : [<c024061c>]    psr: 60000193
> sp : c782fd20  ip : 00000029  fp : c13a1460
> r10: 00000000  r9 : 00000008  r8 : 000000d0
> r7 : c13a1400  r6 : 00000002  r5 : 00000000  r4 : 00060002
> r3 : 000000d0  r2 : 00000000  r1 : 00080200  r0 : c13a1400
> Flags: nZCv  IRQs off  FIQs on  Mode SVC_32  ISA ARM  Segment kernel
> Control: 00c5387d  Table: 50004008  DAC: 00000017
> Process swapper (pid: 1, stack limit = 0xc782e268)
> Stack: (0xc782fd20 to 0xc7830000)
> fd20: c13a1460 c0200f64 00000000 00060002 00000000 00000002 c13a1400 00000010
> fd40: 00000000 c024061c 00060002 00000000 00000002 00000008 c782fda0 c139a5c0
> fd60: c139a5c0 00000000 00000000 0000005a c04cc52c c04cc594 c04ea5fe c00565c0
> fd80: 00000000 00000000 00000000 c04cc52c c139a5c0 c04cc57c 00000000 c04eb328
> fda0: c04cc55c c04eb324 c04c44c0 c0056768 c04cc52c c04cc57c 00000000 c0058d64
> fdc0: 0000005a c04d7dd8 00000000 c005617c 0000005a c000efbc c04eb350 00000001
> fde0: c782fe08 c000853c c036c540 60000013 ffffffff c782fe3c c04cc57c c04cc55c
> fe00: 60000013 c000dd80 c04cc57c c782c000 ffffffff 00000001 60000013 c04cc52c
> fe20: c139a5c0 0000005a c04cc57c c04cc55c 60000013 c04c44c0 f6010000 c782fe50
> fe40: c036c53c c036c540 60000013 ffffffff c023fec0 c00574c8 00000000 c008b2dc
> fe60: c023fec0 00000000 00000000 c13a1400 0000005a c139a5c0 c04cc52c c0057960
> fe80: 0000005a c13a1400 c04c44b8 00000000 c051d238 c049b0ec 00000000 c03688fc
> fea0: c7853e60 c13a1400 c7804f80 00000000 c04c44f4 60000013 c7855a80 00000000
> fec0: c04e1bb4 c04c44c0 c04c44c0 c04e1bb4 c04e1bb4 c051d238 c049b0ec 00000000
> fee0: c04eb040 c020588c c04c44c0 c0204524 c04c44c0 c04c44f4 c04e1bb4 c02046ac
> ff00: c13a01e0 c0204738 00000000 c782ff18 c04e1bb4 c0202e30 c7803878 c7823700
> ff20: c04dd1d0 c040b8d4 c04e1bb4 c04e1bb4 c04dd1d0 c0203600 c040b8d4 c01b8568
> ff40: 00000000 00000000 c04e1bb4 00000007 c04eb040 c782e000 c04a65e0 c0204ce8
> ff60: 00000000 c04a65d4 00000007 c04eb040 c782e000 c0008628 c04c7ea0 00000000
> ff80: 0000009c 00000000 c0625cf9 c0037178 00000006 00000006 c0461b84 c042cee8
> ffa0: c04c7ea0 c04abdd4 c04a65d4 00000007 c04eb040 0000009c c04841b0 c04a65e0
> ffc0: 00000000 c048430c 00000006 00000006 c04841b0 00000000 00000000 c048421c
> ffe0: c000f08c 00000013 00000000 00000000 00000000 c000f08c 00000000 00000000
> [<c023e7fc>] (s3c_hsotg_handle_outdone+0x44/0x158) from [<c024061c>]
> (s3c_hsotg_irq+0x75c/0x804)
> [<c024061c>] (s3c_hsotg_irq+0x75c/0x804) from [<c00565c0>]
> (handle_irq_event_percpu+0x50/0x1bc)
> [<c00565c0>] (handle_irq_event_percpu+0x50/0x1bc) from [<c0056768>]
> (handle_irq_event+0x3c/0x5c)
> [<c0056768>] (handle_irq_event+0x3c/0x5c) from [<c0058d64>]
> (handle_level_irq+0x8c/0x118)
> [<c0058d64>] (handle_level_irq+0x8c/0x118) from [<c005617c>]
> (generic_handle_irq+0x38/0x44)
> [<c005617c>] (generic_handle_irq+0x38/0x44) from [<c000efbc>]
> (handle_IRQ+0x30/0x84)
> [<c000efbc>] (handle_IRQ+0x30/0x84) from [<c000853c>] (vic_handle_irq+0x68/0xa8)
> [<c000853c>] (vic_handle_irq+0x68/0xa8) from [<c000dd80>] (__irq_svc+0x40/0x60)
> Exception stack(0xc782fe08 to 0xc782fe50)
> fe00:                   c04cc57c c782c000 ffffffff 00000001 60000013 c04cc52c
> fe20: c139a5c0 0000005a c04cc57c c04cc55c 60000013 c04c44c0 f6010000 c782fe50
> fe40: c036c53c c036c540 60000013 ffffffff
> [<c000dd80>] (__irq_svc+0x40/0x60) from [<c036c540>]
> (_raw_spin_unlock_irqrestore+0x10/0x14)
> [<c036c540>] (_raw_spin_unlock_irqrestore+0x10/0x14) from [<c00574c8>]
> (__setup_irq+0x178/0x3f8)
> [<c00574c8>] (__setup_irq+0x178/0x3f8) from [<c0057960>]
> (request_threaded_irq+0xc4/0x12c)
> [<c0057960>] (request_threaded_irq+0xc4/0x12c) from [<c03688fc>]
> (s3c_hsotg_probe+0x14c/0x700)
> [<c03688fc>] (s3c_hsotg_probe+0x14c/0x700) from [<c020588c>]
> (platform_drv_probe+0x18/0x1c)
> [<c020588c>] (platform_drv_probe+0x18/0x1c) from [<c0204524>]
> (driver_probe_device+0x78/0x200)
> [<c0204524>] (driver_probe_device+0x78/0x200) from [<c0204738>]
> (__driver_attach+0x8c/0x90)
> [<c0204738>] (__driver_attach+0x8c/0x90) from [<c0202e30>]
> (bus_for_each_dev+0x60/0x8c)
> [<c0202e30>] (bus_for_each_dev+0x60/0x8c) from [<c0203600>]
> (bus_add_driver+0xac/0x250)
> [<c0203600>] (bus_add_driver+0xac/0x250) from [<c0204ce8>]
> (driver_register+0x58/0x130)
> [<c0204ce8>] (driver_register+0x58/0x130) from [<c0008628>]
> (do_one_initcall+0x34/0x17c)
> [<c0008628>] (do_one_initcall+0x34/0x17c) from [<c048430c>]
> (kernel_init+0xf0/0x1bc)
> [<c048430c>] (kernel_init+0xf0/0x1bc) from [<c000f08c>]
> (kernel_thread_exit+0x0/0x8)
> Code: e0433106 e0833006 e1a03183 e0828003 (e5984030)
> ---[ end trace 2ea4e574318ecf99 ]---
> Kernel panic - not syncing: Fatal exception in interrupt
> -----------------------------------------------------------------------------------
> 
> 
> When I try locate the source using arm-linux-gdb, I got this:
> -------------------------------------------------------------
> GNU gdb (Sourcery G++ Lite 2008q3-72) 6.8.50.20080821-cvs
> Copyright (C) 2008 Free Software Foundation, Inc.
> License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
> This is free software: you are free to change and redistribute it.
> There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
> and "show warranty" for details.
> This GDB was configured as "--host=i686-pc-linux-gnu
> --target=arm-none-linux-gnueabi".
> For bug reporting instructions, please see:
> <https://support.codesourcery.com/GNUToolchain/>...
> (gdb) l *(s3c_hsotg_handle_outdone+0x44)
> 0xc023e7fc is in s3c_hsotg_handle_outdone (drivers/usb/gadget/s3c-hsotg.c:1553).
> 1548	static void s3c_hsotg_handle_outdone(struct s3c_hsotg *hsotg,
> 1549					     int epnum, bool was_setup)
> 1550	{
> 1551		u32 epsize = readl(hsotg->regs + DOEPTSIZ(epnum));
> 1552		struct s3c_hsotg_ep *hs_ep = &hsotg->eps[epnum];
> 1553		struct s3c_hsotg_req *hs_req = hs_ep->req;
> 1554		struct usb_request *req = &hs_req->req;
> 1555		unsigned size_left = DxEPTSIZ_XferSize_GET(epsize);
> 1556		int result = 0;
> 1557	
> (gdb)
> 
> 
> 
> I also try the old linux like 2.6.36, I works fine.

Lukasz, any ideas ?

-- 
balbi

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