netdev - Re: [PATCH] brcmfmac: sdio: Fix OOB interrupt initialization on brcm43362

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Date:   Mon, 6 Jan 2020 20:19:19 +0100
From:   Jean-Philippe Brucker <jean-philippe@...aro.org>
To:     Dmitry Osipenko <digetx@...il.com>
Cc:     Arend Van Spriel <arend.vanspriel@...adcom.com>,
        linux-wireless@...r.kernel.org,
        brcm80211-dev-list.pdl@...adcom.com,
        brcm80211-dev-list@...ress.com, netdev@...r.kernel.org,
        hdegoede@...hat.com, franky.lin@...adcom.com,
        hante.meuleman@...adcom.com, chi-hsien.lin@...ress.com,
        wright.feng@...ress.com, kvalo@...eaurora.org, davem@...emloft.net
Subject: Re: [PATCH] brcmfmac: sdio: Fix OOB interrupt initialization on
 brcm43362

Hi Dmitry,

On Thu, Dec 26, 2019 at 05:37:58PM +0300, Dmitry Osipenko wrote:
> I haven't seen any driver probe failures due to OOB on NVIDIA Tegra,
> only suspend-resume was problematic due to the unbalanced OOB
> interrupt-wake enabling.
> 
> But maybe checking whether OOB interrupt-wake works by invoking
> enable_irq_wake() during brcmf_sdiod_intr_register() causes trouble for
> the cubietruck board.
> 
> @Jean-Philippe, could you please try this change (on top of recent
> linux-next):

Sorry for the delay, linux-next doesn't boot for me at the moment and I
have little time to investigate why, so I might retry closer to the merge
window.

However, isn't the interrupt-wake issue independent from the problem
(introduced in v4.17) that my patch fixes? I applied "brcmfmac: Keep OOB
wake-interrupt disabled when it shouldn't be enabled" on v5.5-rc5 and it
doesn't seem to cause a regression, but the wifi only works if I apply my
patch as well.

Thanks,
Jean

> 
> diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
> b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
> index b684a5b6d904..80d7106b10a9 100644
> --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
> +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
> @@ -115,13 +115,6 @@ int brcmf_sdiod_intr_register(struct brcmf_sdio_dev
> *sdiodev)
>                 }
>                 sdiodev->oob_irq_requested = true;
> 
> -               ret = enable_irq_wake(pdata->oob_irq_nr);
> -               if (ret != 0) {
> -                       brcmf_err("enable_irq_wake failed %d\n", ret);
> -                       return ret;
> -               }
> -               disable_irq_wake(pdata->oob_irq_nr);
> -
>                 sdio_claim_host(sdiodev->func1);
> 
>                 if (sdiodev->bus_if->chip == BRCM_CC_43362_CHIP_ID) {