[SCSI] ibmvfc: Handle Virtual I/O Server reboot
If a Virtual I/O server is rebooted, the client fibre channel sees a transport event on its CRQ, which causes it to attempt to reconnect to the CRQ. For a period of time during the VIOS reboot, the client's attempts to register the CRQ will return H_CLOSED, indicating the server side is not currently registered. The ibmvfc driver was not handling this well and was taking the virtual adapter offline. Fix this by re-enabling our interrupt and waiting for the event on our CRQ indicating the server is back, at which point we can reconnect. Signed-off-by: Brian King <brking@linux.vnet.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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@ -4302,7 +4302,9 @@ static void ibmvfc_do_work(struct ibmvfc_host *vhost)
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spin_unlock_irqrestore(vhost->host->host_lock, flags);
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rc = ibmvfc_reset_crq(vhost);
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spin_lock_irqsave(vhost->host->host_lock, flags);
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if (rc || (rc = ibmvfc_send_crq_init(vhost)) ||
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if (rc == H_CLOSED)
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vio_enable_interrupts(to_vio_dev(vhost->dev));
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else if (rc || (rc = ibmvfc_send_crq_init(vhost)) ||
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(rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) {
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ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
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dev_err(vhost->dev, "Error after reset (rc=%d)\n", rc);
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