From: Tom Rix trix@redhat.com
[ Upstream commit e3914ed6cf44bfe1f169e26241f8314556fd1ac1 ]
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 Link: https://lore.kernel.org/r/20200802142339.21091-1-trix@redhat.com Signed-off-by: Stefan Schmidt stefan@datenfreihafen.org Signed-off-by: Sasha Levin sashal@kernel.org --- 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 8dbccec6ac866..5945ac5f38eea 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;