[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Message-ID: <d9486296c3b6b12ab3a0515fcd47d56447a07bfc.1699897370.git.baruch@tkos.co.il>
Date: Mon, 13 Nov 2023 19:42:49 +0200
From: Baruch Siach <baruch@...s.co.il>
To: Alexandre Torgue <alexandre.torgue@...s.st.com>,
Jose Abreu <joabreu@...opsys.com>
Cc: netdev@...r.kernel.org,
Baruch Siach <baruch@...s.co.il>
Subject: [PATCH net 1/2] net: stmmac: fix rx budget limit check
The while loop condition verifies 'count < limit'. Neither value change
before the 'count >= limit' check. As is this check is dead code. But
code inspection reveals a code path that modifies 'count' and then goto
'drain_data' and back to 'read_again'. So there is a need to verify
count value sanity after 'read_again'.
Move 'read_again' up to fix the count limit check.
Fixes: ec222003bd94 ("net: stmmac: Prepare to add Split Header support")
Signed-off-by: Baruch Siach <baruch@...s.co.il>
---
drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 3e50fd53a617..f28838c8cdb3 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -5328,10 +5328,10 @@ static int stmmac_rx(struct stmmac_priv *priv, int limit, u32 queue)
len = 0;
}
+read_again:
if (count >= limit)
break;
-read_again:
buf1_len = 0;
buf2_len = 0;
entry = next_entry;
--
2.42.0
Powered by blists - more mailing lists