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Message-ID: <1d8c4ab5-8952-87be-aad1-67d3cd9f4eb0@broadcom.com>
Date:   Tue, 5 Apr 2022 21:11:08 +0200
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Subject: Re: [RESEND PATCH 06/11] brcmfmac: sdio: Fix undefined behavior due
 to shift overflowing the constant
To:     Borislav Petkov <bp@alien8.de>, Kalle Valo <kvalo@kernel.org>
Cc:     LKML <linux-kernel@vger.kernel.org>,
        Arend van Spriel <aspriel@gmail.com>,
        Franky Lin <franky.lin@broadcom.com>,
        Hante Meuleman <hante.meuleman@broadcom.com>,
        "David S. Miller" <davem@davemloft.net>,
        Jakub Kicinski <kuba@kernel.org>,
        brcm80211-dev-list.pdl@broadcom.com, netdev@vger.kernel.org,
        linux-wireless@vger.kernel.org
References: <20220405151517.29753-1-bp@alien8.de>
 <20220405151517.29753-7-bp@alien8.de> <87y20jr1qt.fsf@kernel.org>
 <YkxpIQHKLXmGBwV1@zn.tnic> <87pmlvqye0.fsf@kernel.org>
 <Ykx0iRlvtBnKqtbG@zn.tnic>
From:   Arend van Spriel <arend.vanspriel@broadcom.com>
In-Reply-To: <Ykx0iRlvtBnKqtbG@zn.tnic>
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On 4/5/2022 6:55 PM, Borislav Petkov wrote:
> Fix:
> 
>    drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c: In function ‘brcmf_sdio_drivestrengthinit’:
>    drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c:3798:2: error: case label does not reduce to an integer constant
>      case SDIOD_DRVSTR_KEY(BRCM_CC_43143_CHIP_ID, 17):
>      ^~~~
>    drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c:3809:2: error: case label does not reduce to an integer constant
>      case SDIOD_DRVSTR_KEY(BRCM_CC_43362_CHIP_ID, 13):
>      ^~~~
> 
> See https://lore.kernel.org/r/YkwQ6%2BtIH8GQpuct@zn.tnic for the gory
> details as to why it triggers with older gccs only.

The details aren't that gory ;-)

Acked-by: Arend van Spriel <arend.vanspriel@broadcom.com>
> Signed-off-by: Borislav Petkov <bp@suse.de>
> Cc: Arend van Spriel <aspriel@gmail.com>
> Cc: Franky Lin <franky.lin@broadcom.com>
> Cc: Hante Meuleman <hante.meuleman@broadcom.com>
> Cc: Kalle Valo <kvalo@kernel.org>
> Cc: "David S. Miller" <davem@davemloft.net>
> Cc: Jakub Kicinski <kuba@kernel.org>
> Cc: brcm80211-dev-list.pdl@broadcom.com
> Cc: netdev@vger.kernel.org

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