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From:   Fabio Estevam <festevam@gmail.com>
Date:   Wed, 2 Jun 2021 19:51:29 -0300
Message-ID: <CAOMZO5A3csY5GkczjXWeec188vUr08kWDnY-miv=9OU8pDToBw@mail.gmail.com>
Subject: Re: ath10k_sdio: Long time for loading firmware and RCU errors
To:     Christian Hewitt <christianshewitt@gmail.com>,
        Gary Bisson <gary.bisson@boundarydevices.com>, gerg@kernel.org,
        erik.stromdahl@gmail.com, Kalle Valo <kvalo@codeaurora.org>
Cc:     linux-wireless <linux-wireless@vger.kernel.org>,
        ath10k@lists.infradead.org
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On Tue, May 25, 2021 at 9:40 PM Fabio Estevam <festevam@gmail.com> wrote:
>
> Hi,
>
> I am using the QCA9377 chip on an imx6dl-pico-pi board running kernel
> 5.10.37 and I noticed that the firmware takes a long time to load
> (more than 3 minutes after boot):

Ok, I replaced eudev with mdev in Buildroot and now it loads the
QCA9377 firmware quickly.

> # wpa_supplicant  -iwlan0 -c /etc/wpa.conf &
> # Successfully initialized wpa_supplicant
> [  234.360447] NOHZ tick-stop error: Non-RCU local softirq work is
> pending, handler #08!!!
> [  234.390478] NOHZ tick-stop error: Non-RCU local softirq work is
> pending, handler #08!!!

These NOHZ messages still pop up.

Cheers