[Xenomai-core] some problems with interrupts

[Xenomai-core] some problems with interrupts

[Roberto Bielli]

Hi,

i installed the patch 'adeos-ipipe-2.6.31-arm-1.16-02.patch' on a kernel 
2.6.31 for imx257 processor.
I have a xenomai complex application that read touchscreen events with 
tslib when pressed.
In the kernel log i try these lines: ( the read job is made in a 
not-realtime thread )

------------[ cut here ]------------
WARNING: at drivers/input/touchscreen/mxc_tsc.c:599 
mxc_tsc_interrupt+0x19c/0x30c [mxc_tsc]()
Modules linked in: can_raw can flexcan sdhci_mxc ehci_hcd mmc_core 
usbcore mxc_tsc nls_base
Backtrace:
[<c0028150>] (dump_backtrace+0x0/0x114) from [<c02c9a48>] 
(dump_stack+0x18/0x1c)
  r7:bf0054bc r6:00000257 r5:bf0046d8 r4:00000000
[<c02c9a30>] (dump_stack+0x0/0x1c) from [<c0043390>] 
(warn_slowpath_common+0x50/0x68)
[<c0043340>] (warn_slowpath_common+0x0/0x68) from [<c00433c0>] 
(warn_slowpath_null+0x18/0x1c)
  r7:0000002e r6:00000001 r5:00008013 r4:d1959400
[<c00433a8>] (warn_slowpath_null+0x0/0x1c) from [<bf0046d8>] 
(mxc_tsc_interrupt+0x19c/0x30c [mxc_tsc])
[<bf00453c>] (mxc_tsc_interrupt+0x0/0x30c [mxc_tsc]) from [<c007242c>] 
(handle_IRQ_event+0x3c/0x124)
  r7:0000002e r6:00000000 r5:00000000 r4:d1c69840
[<c00723f0>] (handle_IRQ_event+0x0/0x124) from [<c007466c>] 
(handle_level_irq+0x98/0x12c)
  r7:0000002e r6:d1c69840 r5:0000002e r4:c0399b70
[<c00745d4>] (handle_level_irq+0x0/0x12c) from [<c0023070>] 
(_text+0x70/0x8c)
  r7:0000002e r6:c03fc240 r5:00000000 r4:0000002e
[<c0023000>] (_text+0x0/0x8c) from [<c0076ee8>] 
(__ipipe_sync_stage+0x180/0x268)
Exception stack(0xc038ff40 to 0xc038ff88)
ff40: 00000020 00000004 c03fc264 fffffffd 00000000 ffffffff 00000001 
c038e000
ff60: c039d540 c0392418 c03b7444 8001f200 41069264 8001f1cc c038ff94 
c038ff88
ff80: c0077770 c0076d78
  r5:c039d508 r4:c03fc260
[<c0076d68>] (__ipipe_sync_stage+0x0/0x268) from [<c0077770>] 
(__ipipe_unstall_root+0x3c/0x50)
[<c0077734>] (__ipipe_unstall_root+0x0/0x50) from [<c00257a8>] 
(cpu_idle+0x64/0xcc)
[<c0025744>] (cpu_idle+0x0/0xcc) from [<c02c6eb0>] (rest_init+0x78/0x8c)
  r7:c0392410 r6:c0020e14 r5:c0020e18 r4:c038e000
[<c02c6e38>] (rest_init+0x0/0x8c) from [<c00089a4>] 
(start_kernel+0x284/0x2e0)
  r5:c0020e18 r4:c0410190
[<c0008720>] (start_kernel+0x0/0x2e0) from [<80008034>] (0x80008034)
  r5:c03b74cc r4:00053175
---[ end trace c83bf7139f281ac6 ]---
mx25-tsc mx25-tsc: mxc_tsc_read_ts: Failed to get data

Do you know the meaning in xenomai of this error (so i can modify 
something to resolve the problem )?

Thanks a lot


-- 
+------------------------------------------------------------------------------------------------+
							
Roberto Bielli
Sviluppo Software					
Axel S.r.l.					
							
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21020 Crosio Della Valle			
Varese - Italy					
							
Telefono: +39 0332 949600			
Fax:      +39 0332 969315			
							
E-mail:   roberto.bielli@domain.hid	
Web Site: www.axelsw.it

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Re: [Xenomai-core] some problems with interrupts

[Gilles Chanteperdrix]

On 10/24/2011 12:14 PM, Roberto Bielli wrote:
> Hi,
> 
> i installed the patch 'adeos-ipipe-2.6.31-arm-1.16-02.patch' on a kernel 
> 2.6.31 for imx257 processor.
> I have a xenomai complex application that read touchscreen events with 
> tslib when pressed.
> In the kernel log i try these lines: ( the read job is made in a 
> not-realtime thread )
> 
> ------------[ cut here ]------------
> WARNING: at drivers/input/touchscreen/mxc_tsc.c:599 
> mxc_tsc_interrupt+0x19c/0x30c [mxc_tsc]()
> (...)
> 
> Do you know the meaning in xenomai of this error (so i can modify 
> something to resolve the problem )?

This looks more like a warning than an error. At first glance, it has
nothing to do with xenomai. Besides, you seem not to be using a mainline
version of the kernel, because in the versions I have, there is no
drivers/input/touchscreen/mxc_tsc.c, so, it is hard for me to debug this
issue.

What has file drivers/input/touchscreen/mxc_tsc.c on line 599?

You may want to try a more recent version, as linux 2.6.31 starts being
seriously outdated.

-- 
					    Gilles.