• Thomas Falcon's avatar
    ibmvnic: Make CRQ interrupt tasklet wait for all capabilities crqs · 249168ad
    Thomas Falcon authored
    After sending device capability queries and requests to the vNIC Server,
    an interrupt is triggered and the responses are written to the driver's
    CRQ response buffer. Since the interrupt can be triggered before all
    responses are written and visible to the partition, there is a danger
    that the interrupt handler or tasklet can terminate before all responses
    are read, resulting in a failure to initialize the device.
    
    To avoid this scenario, when capability commands are sent, we set
    a flag that will be checked in the following interrupt tasklet that
    will handle the capability responses from the server. Once all
    responses have been handled, the flag is disabled; and the tasklet
    is allowed to terminate.
    Signed-off-by: default avatarThomas Falcon <tlfalcon@linux.vnet.ibm.com>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    249168ad
ibmvnic.h 24.6 KB