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 c7c3591669
)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
stable-2.7
parent
e389e44a35
commit
2817466c55
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@ -2350,7 +2350,7 @@ static void rtl8139_cplus_transmit(RTL8139State *s)
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{
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int txcount = 0;
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while (rtl8139_cplus_transmit_one(s))
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while (txcount < 64 && rtl8139_cplus_transmit_one(s))
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{
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++txcount;
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}
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