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cppcheck: Work around bug in cppcheck 2.12.0

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cppcheck 2.12.0 (and maybe some other versions) things this if condition
is always true, which is demonstrably not true.  Work around the bug for
now.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
This commit is contained in:
David Gibson 2023-09-29 15:50:22 +10:00 committed by Stefano Brivio
parent 8640d62af7
commit 117b474f85
1 changed files with 7 additions and 0 deletions
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7
tcp.c
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@ -1553,6 +1553,13 @@ static int tcp_update_seqack_wnd(const struct ctx *c, struct tcp_tap_conn *conn,
conn->wnd_to_tap = MIN(new_wnd_to_tap >> conn->ws_to_tap, USHRT_MAX);
/* Certain cppcheck versions, e.g. 2.12.0 have a bug where they think
* the MIN() above restricts conn->wnd_to_tap to be zero. That's
* clearly incorrect, but until the bug is fixed, work around it.
* https://bugzilla.redhat.com/show_bug.cgi?id=2240705
* https://sourceforge.net/p/cppcheck/discussion/general/thread/f5b1a00646/
*/
/* cppcheck-suppress [knownConditionTrueFalse, unmatchedSuppression] */
if (!conn->wnd_to_tap)
conn_flag(c, conn, ACK_TO_TAP_DUE);