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r8152: check budget for r8152_poll()
[ Upstream commit a7b8d60 ] According to the document of napi, there is no rx process when the budget is 0. Therefore, r8152_poll() has to return 0 directly when the budget is equal to 0. Fixes: d2187f8 ("r8152: divide the tx and rx bottom functions") Signed-off-by: Hayes Wang <hayeswang@realtek.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Sasha Levin <sashal@kernel.org>
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