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From: "Hennerich, Michael" <Michael.Hennerich@analog.com>
To: "trix@redhat.com" <trix@redhat.com>,
	"alex.aring@gmail.com" <alex.aring@gmail.com>,
	"stefan@datenfreihafen.org" <stefan@datenfreihafen.org>,
	"davem@davemloft.net" <davem@davemloft.net>,
	"kuba@kernel.org" <kuba@kernel.org>,
	"marcel@holtmann.org" <marcel@holtmann.org>
Cc: "linux-wpan@vger.kernel.org" <linux-wpan@vger.kernel.org>,
	"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: RE: [PATCH] ieee802154/adf7242: check status of adf7242_read_reg
Date: Mon, 3 Aug 2020 06:20:58 +0000
Message-ID: <BN6PR03MB25967591266E409D1DA920D68E4D0@BN6PR03MB2596.namprd03.prod.outlook.com> (raw)
In-Reply-To: <20200802142339.21091-1-trix@redhat.com>



> -----Original Message-----
> From: trix@redhat.com <trix@redhat.com>
> Sent: Sonntag, 2. August 2020 16:24
> To: Hennerich, Michael <Michael.Hennerich@analog.com>;
> alex.aring@gmail.com; stefan@datenfreihafen.org; davem@davemloft.net;
> kuba@kernel.org; marcel@holtmann.org
> Cc: linux-wpan@vger.kernel.org; netdev@vger.kernel.org; linux-
> kernel@vger.kernel.org; Tom Rix <trix@redhat.com>
> Subject: [PATCH] ieee802154/adf7242: check status of adf7242_read_reg
> 
> 
> From: Tom Rix <trix@redhat.com>
> 
> Clang static analysis reports this error
> 
> adf7242.c:887:6: warning: Assigned value is garbage or undefined
>         len = len_u8;
>             ^ ~~~~~~
> 
> len_u8 is set in
>        adf7242_read_reg(lp, 0, &len_u8);
> 
> When this call fails, len_u8 is not set.
> 
> So check the return code.
> 
> Fixes: 7302b9d90117 ("ieee802154/adf7242: Driver for ADF7242 MAC
> IEEE802154")
> 
> Signed-off-by: Tom Rix <trix@redhat.com>

Acked-by: Michael Hennerich <michael.hennerich@analog.com>

> ---
>  drivers/net/ieee802154/adf7242.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ieee802154/adf7242.c
> b/drivers/net/ieee802154/adf7242.c
> index c11f32f644db..7db9cbd0f5de 100644
> --- a/drivers/net/ieee802154/adf7242.c
> +++ b/drivers/net/ieee802154/adf7242.c
> @@ -882,7 +882,9 @@ static int adf7242_rx(struct adf7242_local *lp)
>  	int ret;
>  	u8 lqi, len_u8, *data;
> 
> -	adf7242_read_reg(lp, 0, &len_u8);
> +	ret = adf7242_read_reg(lp, 0, &len_u8);
> +	if (ret)
> +		return ret;
> 
>  	len = len_u8;
> 
> --
> 2.18.1


  reply index

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-08-02 14:23 trix
2020-08-03  6:20 ` Hennerich, Michael [this message]
2020-08-03 18:27 ` Stefan Schmidt

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