32 lines
1.1 KiB
Diff
32 lines
1.1 KiB
Diff
|
From: Prasad J Pandit <pjp@fedoraproject.org>
|
||
|
|
Date: Fri, 21 Oct 2016 17:39:29 +0530
|
||
|
|
Subject: [PATCH] net: rtl8139: limit processing of ring descriptors
|
||
|
|
|
||
|
|
RTL8139 ethernet controller in C+ mode supports multiple
|
||
|
|
descriptor rings, each with maximum of 64 descriptors. While
|
||
|
|
processing transmit descriptor ring in 'rtl8139_cplus_transmit',
|
||
|
|
it does not limit the descriptor count and runs forever. Add
|
||
|
|
check to avoid it.
|
||
|
|
|
||
|
|
Reported-by: Andrew Henderson <hendersa@icculus.org>
|
||
|
|
Signed-off-by: Prasad J Pandit <pjp@fedoraproject.org>
|
||
|
|
Signed-off-by: Jason Wang <jasowang@redhat.com>
|
||
|
|
(cherry picked from commit c7c35916692fe010fef25ac338443d3fe40be225)
|
||
|
|
---
|
||
|
|
hw/net/rtl8139.c | 2 +-
|
||
|
|
1 file changed, 1 insertion(+), 1 deletion(-)
|
||
|
|
|
||
|
|
diff --git a/hw/net/rtl8139.c b/hw/net/rtl8139.c
|
||
|
|
index 1e5ec14..138fa62 100644
|
||
|
|
--- a/hw/net/rtl8139.c
|
||
|
|
+++ b/hw/net/rtl8139.c
|
||
|
|
@@ -2379,7 +2379,7 @@ static void rtl8139_cplus_transmit(RTL8139State *s)
|
||
|
|
{
|
||
|
|
int txcount = 0;
|
||
|
|
|
||
|
|
- while (rtl8139_cplus_transmit_one(s))
|
||
|
|
+ while (txcount < 64 && rtl8139_cplus_transmit_one(s))
|
||
|
|
{
|
||
|
|
++txcount;
|
||
|
|
}
|