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From:   Fabio Estevam <festevam@gmail.com>
Date:   Fri, 17 Sep 2021 14:37:52 -0300
Message-ID: <CAOMZO5BROh1wET6vcif_8Q+aMQUFqRMP5uttBBLV8nJnbOv8rg@mail.gmail.com>
Subject: ath10k_sdio: failed to write to address
To:     Kalle Valo <kvalo@codeaurora.org>, wgong@codeaurora.org
Cc:     erik.stromdahl@gmail.com, niklas.cassel@wdc.com,
        ath10k@lists.infradead.org,
        linux-wireless <linux-wireless@vger.kernel.org>,
        alagusankar@silex-india.com
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Hi,

On an i.MX7-based board, I see the following "failed to write to address" error:

ath10k_sdio mmc2:0001:1: qca9377 hw1.1 sdio target 0x05020001 chip_id
0x00000000 sub 0000:0000
ath10k_sdio mmc2:0001:1: kconfig debug 0 debugfs 0 tracing 0 dfs 0 testmode 0
ath10k_sdio mmc2:0001:1: firmware ver WLAN.TF.1.1.1-00061-QCATFSWPZ-1
api 5 features ignore-otp crc32 7746e551
EXT4-fs (mmcblk0p1): re-mounted. Opts: (null)
 ath10k_sdio mmc2:0001:1: failed to fetch board data for
bus=sdio,vendor=0271,device=0701,subsystem-vendor=0000,subsystem-device=0000
from ath10k/QCA9377/hw1.0/board-2.bin
ath10k_sdio mmc2:0001:1: board_file api 1 bmi_id N/A crc32 544289f7
ath10k_sdio mmc2:0001:1: htt-ver 3.32 wmi-op 4 htt-op 3 cal otp
max-sta 32 raw 0 hwcrypto 1
ath10k_sdio mmc2:0001:1: failed to write to address 0x12ff5: -84
ath10k_sdio mmc2:0001:1: failed to write skb to 0x12ff5 asynchronously: -84

The wifi is functional despite the errors.

I tried applying Erik's patch:
https://github.com/erstrom/linux-ath/commit/6507fd8df431e1d1f1ea344224956387dc1d35aa

and the one from Niklas:
https://github.com/erstrom/linux-ath/commit/4e794a12fa89e353e38528d1ada5d86f19672c3c

but it did not help.

Does anyone have any suggestions as to how to fix it?

Thanks,

Fabio Estevam