ieee802154/adf7242: check status of adf7242_read_reg
[ Upstream commite3914ed6cf
] 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:7302b9d901
("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>
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@ -882,7 +882,9 @@ static int adf7242_rx(struct adf7242_local *lp)
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int ret;
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u8 lqi, len_u8, *data;
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adf7242_read_reg(lp, 0, &len_u8);
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ret = adf7242_read_reg(lp, 0, &len_u8);
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if (ret)
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return ret;
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len = len_u8;
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