From a7b8d60b37237680009dd0b025fe8c067aba0ee3 Mon Sep 17 00:00:00 2001
From: Hayes Wang <hayeswang@realtek.com>
Date: Fri, 8 Sep 2023 15:01:52 +0800
Subject: [PATCH] r8152: check budget for r8152_poll()
Git-commit: a7b8d60b37237680009dd0b025fe8c067aba0ee3
References: git-fixes
Patch-mainline: v6.6-rc2
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 <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Oliver Neukum <oneukum@suse.com>
---
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 332c853ca99b..0c13d9950cd8 100644
--- a/drivers/net/usb/r8152.c
+++ b/drivers/net/usb/r8152.c
@@ -2636,6 +2636,9 @@ 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) {
--
2.42.0