linux-kernel - Re: iwlwifi: Regression after migrating to 6.6.32

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Date: Tue, 11 Jun 2024 11:32:45 -0300
From: Fabio Estevam <festevam@...il.com>
To: Johannes Berg <johannes@...solutions.net>
Cc: miriam.rachel.korenblit@...el.com, kvalo@...nel.org, 
	Jakub Kicinski <kuba@...nel.org>, linux-wireless <linux-wireless@...r.kernel.org>, 
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: iwlwifi: Regression after migrating to 6.6.32

Hi Johannes,

I forgot to mention, but the Wifi device I am using is:

Intel(R) Wi-Fi 6 AX200 160MHz, REV=0x340

On Tue, Jun 11, 2024 at 10:54 AM Johannes Berg
<johannes@...solutions.net> wrote:

> > [    5.038174] rxb->offset is 0 trans_pcie->rx_buf_bytes is 4096
>
> so that looks pretty normal?
>
> Might be useful to see rx->page_dma too, supported_dma_mask should be
> 4095 or 2047 depending on the device, but I'm not sure how you could end
> up with a DMA mapping for a page that's not at least 11 bit aligned?

Here it goes:

[    4.344218] rxb->offset is 0 trans_pcie->rx_buf_bytes is 4096
rxb->page_dma is 4215433216 trans_pcie->supported_dma_mask is 4095
[    4.355936] WARNING: CPU: 2 PID: 135 at
/drivers/net/wireless/intel/iwlwifi/pcie/rx.c:269
iwl_pcie_rxmq_restock.part.0+0x15c/0x168 [iwlwifi]

I don't know what a typical rxb->page_dma should be.

Thanks