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From: Stephen Hemminger <stephen@networkplumber.org>
To: dev@dpdk.org
Cc: Stephen Hemminger <stephen@networkplumber.org>, shalomt@mellanox.com
Subject: [dpdk-dev] [PATCH 1/5] devlink: fix unitialized warning
Date: Sun, 29 Nov 2020 09:54:33 -0800	[thread overview]
Message-ID: <20201129175437.15346-2-stephen@networkplumber.org> (raw)
In-Reply-To: <20201129175437.15346-1-stephen@networkplumber.org>

GCC-10 complains about uninitialized variable.

devlink.c: In function ‘cmd_dev’:
devlink.c:2803:12: warning: ‘val_u32’ may be used uninitialized in this function [-Wmaybe-uninitialized]
 2803 |    val_u16 = val_u32;
      |    ~~~~~~~~^~~~~~~~~
devlink.c:2747:11: note: ‘val_u32’ was declared here
 2747 |  uint32_t val_u32;
      |           ^~~~~~~

This is a false positive because it can't figure out the control flow when the parse returns error.
Simplest fix is to initialize variable.

Fixes: 2557dca2b028 ("devlink: Add string to uint{8,16,32} conversion for generic parameters")
Cc: shalomt@mellanox.com
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
 devlink/devlink.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/devlink/devlink.c b/devlink/devlink.c
index 1ff865bc5c22..ca99732efd00 100644
--- a/devlink/devlink.c
+++ b/devlink/devlink.c
@@ -2744,7 +2744,7 @@ static int cmd_dev_param_set(struct dl *dl)
 	struct param_ctx ctx = {};
 	struct nlmsghdr *nlh;
 	bool conv_exists;
-	uint32_t val_u32;
+	uint32_t val_u32 = 0;
 	uint16_t val_u16;
 	uint8_t val_u8;
 	bool val_bool;

  reply	other threads:[~2020-11-29 17:55 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-29 17:54 [dpdk-dev] [PATCH iproute2 0/5] fix warnings from gcc-10 Stephen Hemminger
2020-11-29 17:54 ` Stephen Hemminger [this message]
2020-11-29 17:54 ` [dpdk-dev] [PATCH 2/5] bridge: fix string length warning Stephen Hemminger
2020-11-29 17:54 ` [dpdk-dev] [PATCH 3/5] tc: fix compiler warnings in ip6 pedit Stephen Hemminger
2020-11-29 17:54 ` [dpdk-dev] [PATCH 4/5] misc: fix compiler warning in ifstat and nstat Stephen Hemminger
2020-11-29 17:54 ` [dpdk-dev] [PATCH 5/5] f_u32: fix compiler gcc-10 compiler warning Stephen Hemminger
2020-11-30  0:17 ` [dpdk-dev] [PATCH iproute2 0/5] fix warnings from gcc-10 Stephen Hemminger

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