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From: Jochen Henneberg <jh@henneberg-systemdesign.com>
To: Giuseppe Cavallaro <peppe.cavallaro@st.com>,Alexandre Torgue
	<alexandre.torgue@foss.st.com>,Jose Abreu
	<joabreu@synopsys.com>,"David S. Miller"
	<davem@davemloft.net>,Eric Dumazet <edumazet@google.com>,Jakub
	Kicinski <kuba@kernel.org>,Paolo Abeni
	<pabeni@redhat.com>,Maxime Coquelin
	<mcoquelin.stm32@gmail.com>,Ong Boon Leong
	<boon.leong.ong@intel.com>,netdev@vger.kernel.org,linux-stm32@st-md-mailman.stormreply.com,linux-arm-kernel@lists.infradead.org,linux-kernel@vger.kernel.org
Subject: [PATCH net V3] net: stmmac: Premature loop termination check was ignored
Date: Wed, 22 Feb 2023 08:38:28 +0100	[thread overview]
Message-ID: <87y1oq5es0.fsf@henneberg-systemdesign.com> (raw)


The premature loop termination check makes sense only in case of the
jump to read_again where the count may have been updated. But
read_again did not include the check.

Fixes: bba2556efad6 ("net: stmmac: Enable RX via AF_XDP zero-copy")
Fixes: ec222003bd94 ("net: stmmac: Prepare to add Split Header support")
Signed-off-by: Jochen Henneberg <jh@henneberg-systemdesign.com>
---
V2: Added fixes tags
V3: Fixed fixes tag format

 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 1a5b8dab5e9b..de98c009866a 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -5031,10 +5031,10 @@ static int stmmac_rx_zc(struct stmmac_priv *priv, int limit, u32 queue)
 			len = 0;
 		}
 
+read_again:
 		if (count >= limit)
 			break;
 
-read_again:
 		buf1_len = 0;
 		entry = next_entry;
 		buf = &rx_q->buf_pool[entry];
@@ -5221,10 +5221,10 @@ 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;
-- 
2.39.2

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

WARNING: multiple messages have this Message-ID (diff)
From: Jochen Henneberg <jh@henneberg-systemdesign.com>
To: Giuseppe Cavallaro <peppe.cavallaro@st.com>,
	Alexandre Torgue <alexandre.torgue@foss.st.com>,
	Jose Abreu <joabreu@synopsys.com>,
	"David S. Miller" <davem@davemloft.net>,
	Eric Dumazet <edumazet@google.com>,
	Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
	Maxime Coquelin <mcoquelin.stm32@gmail.com>,
	Ong Boon Leong <boon.leong.ong@intel.com>,
	netdev@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH net V3] net: stmmac: Premature loop termination check was ignored
Date: Wed, 22 Feb 2023 08:38:28 +0100	[thread overview]
Message-ID: <87y1oq5es0.fsf@henneberg-systemdesign.com> (raw)


The premature loop termination check makes sense only in case of the
jump to read_again where the count may have been updated. But
read_again did not include the check.

Fixes: bba2556efad6 ("net: stmmac: Enable RX via AF_XDP zero-copy")
Fixes: ec222003bd94 ("net: stmmac: Prepare to add Split Header support")
Signed-off-by: Jochen Henneberg <jh@henneberg-systemdesign.com>
---
V2: Added fixes tags
V3: Fixed fixes tag format

 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 1a5b8dab5e9b..de98c009866a 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -5031,10 +5031,10 @@ static int stmmac_rx_zc(struct stmmac_priv *priv, int limit, u32 queue)
 			len = 0;
 		}
 
+read_again:
 		if (count >= limit)
 			break;
 
-read_again:
 		buf1_len = 0;
 		entry = next_entry;
 		buf = &rx_q->buf_pool[entry];
@@ -5221,10 +5221,10 @@ 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;
-- 
2.39.2

             reply	other threads:[~2023-02-22  7:42 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-02-22  7:38 Jochen Henneberg [this message]
2023-02-22  7:38 ` [PATCH net V3] net: stmmac: Premature loop termination check was ignored Jochen Henneberg
2023-02-22  9:07 ` Simon Horman
2023-02-22  9:07   ` Simon Horman
2023-02-22 15:49   ` Henneberg - Systemdesign
2023-02-22 15:49     ` Henneberg - Systemdesign
2023-02-22 18:03     ` Andrew Lunn
2023-02-22 18:03       ` Andrew Lunn
2023-02-23 11:34       ` Jochen Henneberg
2023-02-23 11:34         ` Jochen Henneberg
2023-02-23 12:55         ` Simon Horman
2023-02-23 12:55           ` Simon Horman

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