boot kernel panic with QCA6174 and kernel 4.8

boot kernel panic with QCA6174 and kernel 4.8

[Alexandre Maloteaux]

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Hi
Since recent kernel upgrade on Arch linux ;  im facing  boot kernel
panics with the ath10k_pci and QCA6174 802.11ac Wireless Network Adapter
on an Eurocom P5 Pro laptop.

This is the main call stack dump :

ath10k_print_driver_info(ath10k_core)
ath10k_pcl_fw_crashed_dump (ath10k_pci)
ath10k_pcl.tasklet

So far i can circumvent the kernel panic by appending
modprobe.blacklist=ath10k_pci  to the kernel command line.
Once the Os is booted i can load the module with modprobe without
triggering the kernel panic.

I also unpacked the initrd and the firmware file are not located in
lib/firmware.

I could not setup kdump so early in the boot process so i have attached
a screenshot of the on screen dump.

lspci :
06:00.0 Network controller: Qualcomm Atheros QCA6174 802.11ac Wireless
Network Adapter (rev 20)

uname -r
4.8.11-1-ARCH

Best Regards

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Re: boot kernel panic with QCA6174 and kernel 4.8

[Mohammed Shafi Shajakhan]

Hi,

On Wed, Dec 07, 2016 at 09:40:29AM +0100, Alexandre Maloteaux wrote:
> Hi
> Since recent kernel upgrade on Arch linux ;  im facing  boot kernel
> panics with the ath10k_pci and QCA6174 802.11ac Wireless Network Adapter
> on an Eurocom P5 Pro laptop.
> 
> This is the main call stack dump :
> 
> ath10k_print_driver_info(ath10k_core)
> ath10k_pcl_fw_crashed_dump (ath10k_pci)
> ath10k_pcl.tasklet

[shafi] If you have the source of the same and with the help of gdb we
can get the exact line

> 
> So far i can circumvent the kernel panic by appending
> modprobe.blacklist=ath10k_pci  to the kernel command line.
> Once the Os is booted i can load the module with modprobe without
> triggering the kernel panic.
> 
> I also unpacked the initrd and the firmware file are not located in
> lib/firmware.

[shafi] interesting your log (image file) seems to show the firmware is crashed
? if the firmware is missing you can give a try with this
https://patchwork.kernel.org/patch/9412085/ but the call trace looks completely
different, if the f/w is not there

long time back we fixed a race https://patchwork.kernel.org/patch/9167045/ but
it should be available in 4.8.11

> 
> I could not setup kdump so early in the boot process so i have attached
> a screenshot of the on screen dump.
> 
> lspci :
> 06:00.0 Network controller: Qualcomm Atheros QCA6174 802.11ac Wireless
> Network Adapter (rev 20)
> 
> uname -r
> 4.8.11-1-ARCH
> 
> Best Regards


> _______________________________________________
> ath10k mailing list
> ath10k@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/ath10k


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Re: boot kernel panic with QCA6174 and kernel 4.8

[Mohammed Shafi Shajakhan]

Hi,

also worth putting a print in 'ath10k_debug_print_board_info'
debug.c

~/ath/drivers/net/wireless/ath/ath10k$ git diff

diff --git a/drivers/net/wireless/ath/ath10k/debug.c
b/drivers/net/wireless/ath/ath10k/debug.c
index bfc0215..89ab4af 100644
--- a/drivers/net/wireless/ath/ath10k/debug.c
	+++ b/drivers/net/wireless/ath/ath10k/debug.c
@@ -169,6 +169,12 @@ void ath10k_debug_print_board_info(struct ath10k *ar)
	else
	scnprintf(boardinfo, sizeof(boardinfo), "N/A");

	+	       if (IS_ERR_OR_NULL(ar->normal_mode_fw.board)) {
		+               printk("\nAvoided oops ?\n");
		+               WARN_ON(1);
		+               return;
		+       }
		+
		ath10k_info(ar, "board_file api %d bmi_id %s
				crc32 %08x",
				ar->bd_api,
				boardinfo,

Let me know if it helps, or you need a patch format

regards,
shafi

On Wed, Dec 07, 2016 at 06:11:49PM +0530, Mohammed Shafi Shajakhan wrote:
> Hi,
> 
> On Wed, Dec 07, 2016 at 09:40:29AM +0100, Alexandre Maloteaux wrote:
> > Hi
> > Since recent kernel upgrade on Arch linux ;  im facing  boot kernel
> > panics with the ath10k_pci and QCA6174 802.11ac Wireless Network Adapter
> > on an Eurocom P5 Pro laptop.
> > 
> > This is the main call stack dump :
> > 
> > ath10k_print_driver_info(ath10k_core)
> > ath10k_pcl_fw_crashed_dump (ath10k_pci)
> > ath10k_pcl.tasklet
> 
> [shafi] If you have the source of the same and with the help of gdb we
> can get the exact line
> 
> > 
> > So far i can circumvent the kernel panic by appending
> > modprobe.blacklist=ath10k_pci  to the kernel command line.
> > Once the Os is booted i can load the module with modprobe without
> > triggering the kernel panic.
> > 
> > I also unpacked the initrd and the firmware file are not located in
> > lib/firmware.
> 
> [shafi] interesting your log (image file) seems to show the firmware is crashed
> ? if the firmware is missing you can give a try with this
> https://patchwork.kernel.org/patch/9412085/ but the call trace looks completely
> different, if the f/w is not there
> 
> long time back we fixed a race https://patchwork.kernel.org/patch/9167045/ but
> it should be available in 4.8.11
> 
> > 
> > I could not setup kdump so early in the boot process so i have attached
> > a screenshot of the on screen dump.
> > 
> > lspci :
> > 06:00.0 Network controller: Qualcomm Atheros QCA6174 802.11ac Wireless
> > Network Adapter (rev 20)
> > 
> > uname -r
> > 4.8.11-1-ARCH
> > 
> > Best Regards
> 
> 
> > _______________________________________________
> > ath10k mailing list
> > ath10k@lists.infradead.org
> > http://lists.infradead.org/mailman/listinfo/ath10k
> 
> 
> _______________________________________________
> ath10k mailing list
> ath10k@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/ath10k

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Re: boot kernel panic with QCA6174 and kernel 4.8

[Alexandre Maloteaux]

Hi would like to clarify that i have the bug since 1 week . However the
kernel panic is semi-Random.

If  i face the kernel panic ; then i can restart indefinitely and i
always face the crash.
Right now i came back home and the laptop starts correctly. I can
restart it multiple time and it will boot correctly as well.

I m facing this behavior since 1 week and can't find a pattern on how to
crash / success boot.

Best Regards

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