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8778b27664
The following patch fixes an issue with the ldmvsw driver where the network connection of a guest domain becomes non-functional after the guest domain has panic'd and rebooted. The root cause was determined to be from the following series of events: 1. Guest domain panics - resulting in the guest no longer processing network packets (from ldmvsw driver) 2. The ldmvsw driver (in the control domain) eventually exerts flow control due to no more available tx drings and stops the tx queue for the guest domain 3. The LDC of the network connection for the guest is reset when the guest domain reboots after the panic. 4. The LDC reset event is received by the ldmvsw driver and the ldmvsw responds by clearing the tx queue for the guest. 5. ldmvsw waits indefinitely for a DATA ACK from the guest - which is the normal method to re-enable the tx queue. But the ACK never comes because the tx queue was cleared due to the LDC reset. To fix this issue, in addition to clearing the tx queue, re-enable the tx queue on a LDC reset. This prevents the ldmvsw from getting caught in this deadlocked state of waiting for a DATA ACK which will never come. Signed-off-by: Aaron Young <Aaron.Young@oracle.com> Acked-by: Sowmini Varadhan <sowmini.varadhan@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net> |
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| .. | ||
| cassini.c | ||
| cassini.h | ||
| Kconfig | ||
| ldmvsw.c | ||
| Makefile | ||
| niu.c | ||
| niu.h | ||
| sunbmac.c | ||
| sunbmac.h | ||
| sungem.c | ||
| sungem.h | ||
| sunhme.c | ||
| sunhme.h | ||
| sunqe.c | ||
| sunqe.h | ||
| sunvnet_common.c | ||
| sunvnet_common.h | ||
| sunvnet.c | ||