Re: [GIT PATCHES for 2.6.28] V4L/DVB fixes, crash in af9005_usb_module_init()

[Ingo Molnar <mingo@elte.hu>]

* Mauro Carvalho Chehab <mchehab@redhat.com> wrote:

> Hi Ingo,
> 
> On Fri, 26 Dec 2008 10:02:20 +0100
> Ingo Molnar <mingo@elte.hu> wrote:
> 
> > > Please test the enclosed patch.
> > 
> > thanks Mauro - i've reverted all my local drivers/media/dvb/ hacks (see 
> > them below) and applied your fix, and started testing things. Will let you 
> > know if i run into any other kind of build or boot trouble.
> 
> Thanks.
> 
> I think both dm1105 and dib0700p Kbuild troubles have already been 
> fixed. However, the opera1/af9005 runtime issue seems to be something 
> different. I suspect that it is related on having af9005-remote or not.
> 
> Let's see if Luca can help us with this issue.

here's that commit again, standalone, with the crash in 
af9005_usb_module_init() embedded. Unfortunately i dont have the .config 
anymore and the crash log is half a year old. I have re-enabled the driver 
in tip/master so if the crash still triggers i should see it within 1-2 
days and i can do a fuller bugreport.

	Ingo

----------------------->
>From 7120b52e90e1837e09bb4621f105022f940b856a Mon Sep 17 00:00:00 2001
From: Ingo Molnar <mingo@elte.hu>
Date: Sat, 21 Jun 2008 08:16:39 +0200
Subject: [PATCH] work around this crash for now:

[    8.585448] calling  opera1_module_init+0x0/0x40
[    8.592370] usbcore: registered new interface driver opera1
[    8.597879] initcall opera1_module_init+0x0/0x40 returned 0 after 5 msecs
[    8.602341] calling  af9005_usb_module_init+0x0/0xb0
[    8.609143] usbcore: registered new interface driver dvb_usb_af9005
[    8.613625] BUG: unable to handle kernel paging request at ff100000
[    8.619858] IP: [<c0c21b02>] af9005_usb_module_init+0x92/0xb0
[    8.619858] *pdpt = 0000000000c6b001 *pde = 0000000000000000
[    8.623858] Oops: 0000 [#1] SMP
[    8.623858]
[    8.623858] Pid: 1, comm: swapper Not tainted (2.6.26-rc6-tip-00382-g5bf10cd-dirty #8770)
[    8.623858] EIP: 0060:[<c0c21b02>] EFLAGS: 00010286 CPU: 1
[    8.623858] EIP is at af9005_usb_module_init+0x92/0xb0
[    8.623858] EAX: ff100000 EBX: 00000000 ECX: 00000000 EDX: f6c55ee8
[    8.623858] ESI: 00000000 EDI: 00000000 EBP: f6c55f60 ESP: f6c55f54
[    8.623858]  DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
[    8.623858] Process swapper (pid: 1, ti=f6c54000 task=f6c538a0 task.ti=f6c54000)
[    8.623858] Stack: 00000005 00000000 00000005 f6c55fe0 c0bef7f4 c0a2e531 00000000 00000005
[    8.623858]        00000000 f6c54000 00d25d95 00000002 c0c50d8c c0c21a70 00000000 6f727200
[    8.623858]        6f632072 2d206564 00203232 f6c53490 f6c55fac c0125568 f6c57fc0 c0103c66
[    8.623858] Call Trace:
[    8.623858]  [<c0bef7f4>] ? kernel_init+0x1a4/0x2b0
[    8.623858]  [<c0c21a70>] ? af9005_usb_module_init+0x0/0xb0
[    8.623858]  [<c0125568>] ? schedule_tail+0x18/0x50
[    8.623858]  [<c0103c66>] ? ret_from_fork+0x6/0x20
[    8.623858]  [<c0bef650>] ? kernel_init+0x0/0x2b0
[    8.623858]  [<c0bef650>] ? kernel_init+0x0/0x2b0
[    8.623858]  [<c0104fa7>] ? kernel_thread_helper+0x7/0x10
[    8.623858]  =======================
[    8.623858] Code: c3 89 44 24 04 c7 04 24 60 72 ae c0 e8 28 8e 50 ff 89 d8 83 c4 08 5b 5d c3 b8 00 00 10 ff 85 c0 74 c1 b8 00 00 10 ff 85 c0 74 b8 <a1> 00 00 10 ff c7 05 b4 96 b9 c0 00 00 10 ff a3 b8 96 b9 c0 eb
[    8.635859] EIP: [<c0c21b02>] af9005_usb_module_init+0x92/0xb0 SS:ESP 0068:f6c55f54
[    8.635859] Kernel panic - not syncing: Fatal exception
[    8.635859] Pid: 1, comm: swapper Tainted: G      D   2.6.26-rc6-tip-00382-g5bf10cd-dirty #8770
[    8.635859]  [<c0129cfb>] panic+0x4b/0x110
[    8.635859]  [<c01059b5>] die+0x115/0x180
[    8.635859]  [<c0118cfc>] do_page_fault+0x2ac/0x880
[    8.635859]  [<c01d5abb>] ? sysfs_addrm_finish+0x1b/0x1c0
[    8.635859]  [<c0118a50>] ? do_page_fault+0x0/0x880
[    8.635859]  [<c08d1212>] error_code+0x72/0x80
[    8.635859]  [<c0c21b02>] ? af9005_usb_module_init+0x92/0xb0
[    8.635859]  [<c0bef7f4>] kernel_init+0x1a4/0x2b0
[    8.635859]  [<c0c21a70>] ? af9005_usb_module_init+0x0/0xb0
[    8.635859]  [<c0125568>] ? schedule_tail+0x18/0x50
[    8.635859]  [<c0103c66>] ? ret_from_fork+0x6/0x20

Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
 drivers/media/dvb/dvb-usb/Kconfig |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/drivers/media/dvb/dvb-usb/Kconfig b/drivers/media/dvb/dvb-usb/Kconfig
index 3c13bcf..661d361 100644
--- a/drivers/media/dvb/dvb-usb/Kconfig
+++ b/drivers/media/dvb/dvb-usb/Kconfig
@@ -235,6 +235,7 @@ config DVB_USB_OPERA1
 config DVB_USB_AF9005
 	tristate "Afatech AF9005 DVB-T USB1.1 support"
 	depends on DVB_USB && EXPERIMENTAL
+	depends on 0
 	select MEDIA_TUNER_MT2060 if !DVB_FE_CUSTOMISE
 	select MEDIA_TUNER_QT1010 if !DVB_FE_CUSTOMISE
 	help