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August 2020 16:24 > To: Hennerich, Michael ; > 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 > Subject: [PATCH] ieee802154/adf7242: check status of adf7242_read_reg >=20 >=20 > From: Tom Rix >=20 > Clang static analysis reports this error >=20 > adf7242.c:887:6: warning: Assigned value is garbage or undefined > len =3D len_u8; > ^ ~~~~~~ >=20 > len_u8 is set in > adf7242_read_reg(lp, 0, &len_u8); >=20 > When this call fails, len_u8 is not set. >=20 > So check the return code. >=20 > Fixes: 7302b9d90117 ("ieee802154/adf7242: Driver for ADF7242 MAC > IEEE802154") >=20 > Signed-off-by: Tom Rix Acked-by: Michael Hennerich > --- > drivers/net/ieee802154/adf7242.c | 4 +++- > 1 file changed, 3 insertions(+), 1 deletion(-) >=20 > 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; >=20 > - adf7242_read_reg(lp, 0, &len_u8); > + ret =3D adf7242_read_reg(lp, 0, &len_u8); > + if (ret) > + return ret; >=20 > len =3D len_u8; >=20 > -- > 2.18.1