From: bugzilla@dpdk.org
To: dev@dpdk.org
Subject: [DPDK/ethdev Bug 1809] net/intel: possible misuse of comma operator
Date: Thu, 23 Oct 2025 23:45:31 +0000 [thread overview]
Message-ID: <bug-1809-3@http.bugs.dpdk.org/> (raw)
http://bugs.dpdk.org/show_bug.cgi?id=1809
Bug ID: 1809
Summary: net/intel: possible misuse of comma operator
Product: DPDK
Version: 20.11
Hardware: All
OS: All
Status: UNCONFIRMED
Severity: normal
Priority: Normal
Component: ethdev
Assignee: dev@dpdk.org
Reporter: stephen@networkplumber.org
Target Milestone: ---
If DPDK is built with clang and -Wcomma is enabled for drivers then:
[1127/3622] Compiling C object
drivers/libtmp_rte_net_ice.a.p/net_intel_ice_ice_ethdev.c.o
../drivers/net/intel/ice/ice_ethdev.c:945:52: warning: possible misuse of comma
operator here [-Wcomma]
945 | entry && (next_entry = LIST_NEXT(entry, next), 1);
| ^
../drivers/net/intel/ice/ice_ethdev.c:945:17: note: cast expression to void to
silence warning
945 | entry && (next_entry = LIST_NEXT(entry, next), 1);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| (void)( )
../drivers/net/intel/ice/ice_ethdev.c:952:52: warning: possible misuse of comma
operator here [-Wcomma]
952 | entry && (next_entry = LIST_NEXT(entry, next), 1);
| ^
../drivers/net/intel/ice/ice_ethdev.c:952:17: note: cast expression to void to
silence warning
952 | entry && (next_entry = LIST_NEXT(entry, next), 1);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| (void)( )
2 warnings generated.
[1150/3622] Compiling C object
drivers/libtmp_rte_net_i40e.a.p/net_intel_i40e_i40e_ethdev.c.o
../drivers/net/intel/i40e/i40e_ethdev.c:5102:49: warning: possible misuse of
comma operator here [-Wcomma]
5102 | entry && (next_entry = LIST_NEXT(entry, next),
1);
| ^
../drivers/net/intel/i40e/i40e_ethdev.c:5102:14: note: cast expression to void
to silence warning
5102 | entry && (next_entry = LIST_NEXT(entry, next),
1);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| (void)( )
../drivers/net/intel/i40e/i40e_ethdev.c:5109:49: warning: possible misuse of
comma operator here [-Wcomma]
5109 | entry && (next_entry = LIST_NEXT(entry, next),
1);
| ^
../drivers/net/intel/i40e/i40e_ethdev.c:5109:14: note: cast expression to void
to silence warning
5109 | entry && (next_entry = LIST_NEXT(entry, next),
1);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| (void)( )
2 warnings generated.
Suggest looking at how LIST_NEXT could be changed to not generate warnings, not
seen elsewhere.
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