From 815deee0e34503dee7e74fb5ba4ea4a9b3a56750 Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Mon, 17 Jun 2019 15:04:49 +0200 Subject: [PATCH] qed: Fix -Wmaybe-uninitialized false positive MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit A previous attempt to shut up the uninitialized variable use warning was apparently insufficient. When CONFIG_PROFILE_ANNOTATED_BRANCHES is set, gcc-8 still warns, because the unlikely() check in DP_NOTICE() causes it to no longer track the state of all variables correctly: drivers/net/ethernet/qlogic/qed/qed_dev.c: In function 'qed_llh_set_ppfid_affinity': drivers/net/ethernet/qlogic/qed/qed_dev.c:798:47: error: 'abs_ppfid' may be used uninitialized in this function [-Werror=maybe-uninitialized] addr = NIG_REG_PPF_TO_ENGINE_SEL + abs_ppfid * 0x4; ~~~~~~~~~~^~~~~ This is not a nice workaround, but always initializing the output from qed_llh_abs_ppfid() at least shuts up the false positive reliably. Fixes: 79284adeb99e ("qed: Add llh ppfid interface and 100g support for offload protocols") Fixes: 8e2ea3ea9625 ("qed: Fix static checker warning") Signed-off-by: Arnd Bergmann Acked-by: Michal Kalderon  Signed-off-by: David S. Miller --- drivers/net/ethernet/qlogic/qed/qed_dev.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/net/ethernet/qlogic/qed/qed_dev.c b/drivers/net/ethernet/qlogic/qed/qed_dev.c index eec7cb65c7e6..a1ebc2b1ca0b 100644 --- a/drivers/net/ethernet/qlogic/qed/qed_dev.c +++ b/drivers/net/ethernet/qlogic/qed/qed_dev.c @@ -652,6 +652,7 @@ static int qed_llh_abs_ppfid(struct qed_dev *cdev, u8 ppfid, u8 *p_abs_ppfid) DP_NOTICE(cdev, "ppfid %d is not valid, available indices are 0..%hhd\n", ppfid, p_llh_info->num_ppfid - 1); + *p_abs_ppfid = 0; return -EINVAL; } -- GitLab