linux-kernel - Re: [PATCH] brcmfmac: fix false-positive -Wmaybe-unintialized warning

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Date:   Thu, 13 Dec 2018 14:59:18 +0000 (UTC)
From:   Kalle Valo <kvalo@...eaurora.org>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     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>,
        Arnd Bergmann <arnd@...db.de>,
        "David S. Miller" <davem@...emloft.net>,
        Hans de Goede <hdegoede@...hat.com>,
        Pieter-Paul Giesberts <pieter-paul.giesberts@...adcom.com>,
        Lyude Paul <lyude@...hat.com>, linux-wireless@...r.kernel.org,
        brcm80211-dev-list.pdl@...adcom.com,
        brcm80211-dev-list@...ress.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] brcmfmac: fix false-positive -Wmaybe-unintialized warning

Arnd Bergmann <arnd@...db.de> wrote:

> When CONFIG_NO_AUTO_INLINE is set, we get a false-postive warning
> for the brcmf_fw_request_nvram_done() function, after gcc figures
> out that brcmf_fw_nvram_from_efi() might not set the 'data_len'
> variable, but fails to notice that it always returns NULL:
> 
> drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c: In function 'brcmf_fw_request_nvram_done':
> drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c:560:11: error: 'data_len' may be used uninitialized in this function [-Werror=maybe-uninitialized]
> 
> Mark it 'inline' to force gcc to understand this.
> 
> Fixes: ce2e6db554fa ("brcmfmac: Add support for getting nvram contents from EFI variables")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> Reviewed-by: Hans de Goede <hdegoede@...hat.com>

Patch applied to wireless-drivers-next.git, thanks.

412dd15c8177 brcmfmac: fix false-positive -Wmaybe-unintialized warning

-- 
https://patchwork.kernel.org/patch/10722445/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches