[PATCH] ath10k: Add interrupt summary based CE processing

[Doug Anderson]

Hi,

On Mon, Jul 20, 2020 at 6:32 PM Peter Oh <peter.oh at eero.com> wrote:
>
> I'll take my word back.
> It's not this patch problem, but by others.
> I have 2 extra patches before the 3 patches so my system looks like
>
> backports from ath.git 5.6-rc1 + linux kernel 4.4 (similar to OpenWrt)
> On top of the working system, I cherry-picked these 5.
>
> #1.
> ath10k: Avoid override CE5 configuration for QCA99X0 chipsets
> ath.git commit 521fc37be3d879561ca5ab42d64719cf94116af0
> #2.
> ath10k: Fix NULL pointer dereference in AHB device probe
> wireless-drivers.git commit 1cfd3426ef989b83fa6176490a38777057e57f6c
> #3.
> ath10k: Add interrupt summary based CE processing
> https://patchwork.kernel.org/patch/11628299/
> #4.
> ath10k: Keep track of which interrupts fired, don't poll them
> https://patchwork.kernel.org/patch/11654631/
> #5.
> ath10k: Get rid of "per_ce_irq" hw param
> https://patchwork.kernel.org/patch/11654633/
>
> The error "[  14.226184] ath10k_ahb a000000.wifi: failed to receive
> initialized event from target: 80000000" is because of #1 and #2,
> since this happens even after I reverted #3~#5.
> Once I reverted all except #1 I got another crash.
>
> [   11.179595] !#%&PageFault P<__ath10k_ce_rx_post_buf+0x14/0x98
> [ath10k_core]> L<0x4bc00> F<005> [0000000c]
> [   11.179643] Unable to handle kernel NULL pointer dereference at
> virtual address 0000000c
> [   11.439207] [<7f15a69c>] (__ath10k_ce_rx_post_buf [ath10k_core])
> from [<7f15a874>] (ath10k_ce_rx_post_buf+0x3c/0x50 [ath10k_core])
> [   11.447204] [<7f15a874>] (ath10k_ce_rx_post_buf [ath10k_core]) from
> [<7f2889a4>] (ath10k_pci_diag_read_mem+0x104/0x2a8 [ath10k_pci])
> [   11.458706] [<7f2889a4>] (ath10k_pci_diag_read_mem [ath10k_pci])
> from [<7f288b68>] (ath10k_pci_diag_read32+0x1c/0x2c [ath10k_pci])
> [   11.470767] [<7f288b68>] (ath10k_pci_diag_read32 [ath10k_pci]) from
> [<7f28abe8>] (ath10k_pci_init_config+0x2c/0x290 [ath10k_pci])
> [   11.482314] [<7f28abe8>] (ath10k_pci_init_config [ath10k_pci]) from
> [<7f28d160>] (ath10k_ahb_hif_power_up+0x7c/0xe8 [ath10k_pci])
> [   11.494153] [<7f28d160>] (ath10k_ahb_hif_power_up [ath10k_pci])
> from [<7f135348>] (ath10k_core_register_work+0x84/0x8f8 [ath10k_core])
> [   11.505766] [<7f135348>] (ath10k_core_register_work [ath10k_core])
> from [<8023b614>] (process_one_work+0x1c0/0x2f8)
> [   11.517594] [<8023b614>] (process_one_work) from [<8023c650>]
> (worker_thread+0x280/0x3c0)
> [   11.527919] [<8023c650>] (worker_thread) from [<802408f8>]
> (kthread+0xd8/0xe8)
> [   11.536247] [<802408f8>] (kthread) from [<80209ce8>]
> (ret_from_fork+0x14/0x2c)
>
> When I revert #1 eventually, my system is back to working.
> So I'm blaming the #1 and #2 could have potential bugs or require
> ath.git branch up-to-date.

You caught me just as I was signing off yesterday evening, but just to
confirm that you are now fairly certain that none of the 3 patches I
was involved with[*] are related to your problems.  If that's wrong
and there's an action I need to take on the patches then let me know!
:-)

[*] The three patches I was involved with:

ath10k: Add interrupt summary based CE processing
https://patchwork.kernel.org/patch/11628299/

ath10k: Keep track of which interrupts fired, don't poll them
https://patchwork.kernel.org/patch/11654631/

ath10k: Get rid of "per_ce_irq" hw param
https://patchwork.kernel.org/patch/11654633/

-Doug