This is a note to let you know that I've just added the patch titled
r8152: check budget for r8152_poll()
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
r8152-check-budget-for-r8152_poll.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit fc9f8fa5b66e57f76d2847a91a3210e1b40b43d0
Author: Hayes Wang <hayeswang@xxxxxxxxxxx>
Date: Fri Sep 8 15:01:52 2023 +0800
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 <hayeswang@xxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c
index b0412d14e8f6c..a19f0431e6f99 100644
--- a/drivers/net/usb/r8152.c
+++ b/drivers/net/usb/r8152.c
@@ -2253,6 +2253,9 @@ 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) {
