From 2323397e5877c50699f81aec4a86222fc8c0f141 Mon Sep 17 00:00:00 2001 From: Hayes Wang Date: Fri, 8 Sep 2023 15:01:52 +0800 Subject: [PATCH] r8152: check budget for r8152_poll() [ Upstream commit a7b8d60b37237680009dd0b025fe8c067aba0ee3 ] 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: d2187f8e4454 ("r8152: divide the tx and rx bottom functions") Signed-off-by: Hayes Wang Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/usb/r8152.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c index 059d610..fc1458f 100644 --- a/drivers/net/usb/r8152.c +++ b/drivers/net/usb/r8152.c @@ -2628,6 +2628,9 @@ static int r8152_poll(struct napi_struct *napi, int budget) struct r8152 *tp = container_of(napi, struct r8152, napi); int work_done; + if (!budget) + return 0; + work_done = rx_bottom(tp, budget); if (work_done < budget) { -- 2.7.4