linux-kernel - Re: [PATCH v2 14/15] brcm80211: use new module_firmware

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Message-ID: <20200516041313.GN3182@x1-fbsd>
Date:   Sat, 16 May 2020 00:13:13 -0400
From:   Rafael Aquini <aquini@...hat.com>
To:     Luis Chamberlain <mcgrof@...nel.org>
Cc:     jeyu@...nel.org, akpm@...ux-foundation.org, arnd@...db.de,
        rostedt@...dmis.org, mingo@...hat.com, cai@....pw,
        dyoung@...hat.com, bhe@...hat.com, peterz@...radead.org,
        tglx@...utronix.de, gpiccoli@...onical.com, pmladek@...e.com,
        tiwai@...e.de, schlad@...e.de, andriy.shevchenko@...ux.intel.com,
        keescook@...omium.org, daniel.vetter@...ll.ch, will@...nel.org,
        mchehab+samsung@...nel.org, kvalo@...eaurora.org,
        davem@...emloft.net, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-wireless@...r.kernel.org,
        brcm80211-dev-list.pdl@...adcom.com,
        brcm80211-dev-list@...ress.com,
        Arend van Spriel <arend.vanspriel@...adcom.com>,
        Franky Lin <franky.lin@...adcom.com>,
        Hante Meuleman <hante.meuleman@...adcom.com>,
        Chi-Hsien Lin <chi-hsien.lin@...ress.com>,
        Wright Feng <wright.feng@...ress.com>,
        Rafał Miłecki <rafal@...ecki.pl>,
        Pieter-Paul Giesberts <pieter-paul.giesberts@...adcom.com>
Subject: Re: [PATCH v2 14/15] brcm80211: use new module_firmware_crashed()

On Fri, May 15, 2020 at 09:28:45PM +0000, Luis Chamberlain wrote:
> This makes use of the new module_firmware_crashed() to help
> annotate when firmware for device drivers crash. When firmware
> crashes devices can sometimes become unresponsive, and recovery
> sometimes requires a driver unload / reload and in the worst cases
> a reboot.
> 
> Using a taint flag allows us to annotate when this happens clearly.
> 
> Cc: linux-wireless@...r.kernel.org
> Cc: brcm80211-dev-list.pdl@...adcom.com
> Cc: brcm80211-dev-list@...ress.com
> Cc: Arend van Spriel <arend.vanspriel@...adcom.com>
> Cc: Franky Lin <franky.lin@...adcom.com>
> Cc: Hante Meuleman <hante.meuleman@...adcom.com>
> Cc: Chi-Hsien Lin <chi-hsien.lin@...ress.com>
> Cc: Wright Feng <wright.feng@...ress.com>
> Cc: Kalle Valo <kvalo@...eaurora.org>
> Cc: "Rafał Miłecki" <rafal@...ecki.pl>
> Cc: Pieter-Paul Giesberts <pieter-paul.giesberts@...adcom.com>
> Signed-off-by: Luis Chamberlain <mcgrof@...nel.org>
> ---
>  drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c
> index c88655acc78c..d623f83568b3 100644
> --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c
> +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c
> @@ -1393,6 +1393,7 @@ void brcmf_fw_crashed(struct device *dev)
>  	struct brcmf_pub *drvr = bus_if->drvr;
>  
>  	bphy_err(drvr, "Firmware has halted or crashed\n");
> +	module_firmware_crashed();
>  
>  	brcmf_dev_coredump(dev);
>  
> -- 
> 2.26.2
> 
Acked-by: Rafael Aquini <aquini@...hat.com>