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Date: Sun, 2 Aug 2020 07:23:39 -0700 From: trix@...hat.com To: michael.hennerich@...log.com, alex.aring@...il.com, stefan@...enfreihafen.org, davem@...emloft.net, kuba@...nel.org, marcel@...tmann.org Cc: linux-wpan@...r.kernel.org, netdev@...r.kernel.org, linux-kernel@...r.kernel.org, Tom Rix <trix@...hat.com> Subject: [PATCH] ieee802154/adf7242: check status of adf7242_read_reg From: Tom Rix <trix@...hat.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@...hat.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
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