ibmveth: lost IRQ while closing/opening device leads to service loss
The order of freeing the IRQ and freeing the device in firmware in ibmveth_close can cause the adapter to become unusable after a subsequent ibmveth_open. Only a reboot of the OS will make the network device usable again. This is seen when cycling the adapter up and down while there is network activity. There is a window where an IRQ will be left unserviced (H_EOI will not be called). The solution is to make a VIO_IRQ_DISABLE h_call, free the device with firmware, and then call free_irq. Signed-off-by: NRobert Jennings <rcj@linux.vnet.ibm.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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