net: stmmac: fix rx budget limit check

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[ Upstream commit fa02de9e75 ]

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: ec222003bd ("net: stmmac: Prepare to add Split Header support")
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Reviewed-by: Serge Semin <fancer.lancer@gmail.com>
Link: https://lore.kernel.org/r/d9486296c3b6b12ab3a0515fcd47d56447a07bfc.1699897370.git.baruch@tkos.co.il
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Baruch Siach 2023-11-13 19:42:49 +02:00 • committed by Greg Kroah-Hartman

parent 18a169810c

commit 49fb680403

1 changed files with 1 additions and 1 deletions

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drivers/net/ethernet/stmicro/stmmac/stmmac_main.c

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