Re: [PATCH net V3] net: stmmac: Premature loop termination check was ignored

Simon Horman [off-list ref] writes:

On Wed, Feb 22, 2023 at 08:38:28AM +0100, Jochen Henneberg wrote:

quoted

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")

This commit was included in v5.13

quoted

Fixes: ec222003bd94 ("net: stmmac: Prepare to add Split Header support")

While this one was included in v5.4

It seems to me that each of the above commits correspond to one
of the two hunks below. I don't know if that means this
patch should be split in two to assist backporting.

I was thinking about this already but the change was so trivial that I
hesitated to split it into two commits. I wanted I will surely change
this.

quoted

Signed-off-by: Jochen Henneberg <redacted>

That aside, this looks good to me.

Reviewed-by: Simon Horman <redacted>

quoted

---
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

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