From: Dave Marquardt <[email protected]>

Allocate and initialize the asynchronous sub-queue required for receiving
full and extended FPIN events from VIOS.

Modify ibmvfc_alloc_channels() to allocate async_scrq using
ibmvfc_alloc_queue() with IBMVFC_SUB_CRQ_FMT format. Update error
handling to properly clean up async_scrq on allocation failures.

Update ibmvfc_channel_setup() to pass async_subq_handle to VIOS during
channel setup, and ibmvfc_channel_setup_done() to store the VIOS cookie
for the async sub-queue.

Modify ibmvfc_release_channels() to free async_scrq resources during
cleanup.

Signed-off-by: Dave Marquardt <[email protected]>
---
 drivers/scsi/ibmvscsi/ibmvfc-core.c | 32 +++++++++++++++++++++++++++++---
 1 file changed, 29 insertions(+), 3 deletions(-)

diff --git a/drivers/scsi/ibmvscsi/ibmvfc-core.c 
b/drivers/scsi/ibmvscsi/ibmvfc-core.c
index aec953f29e55..06898a407d07 100644
--- a/drivers/scsi/ibmvscsi/ibmvfc-core.c
+++ b/drivers/scsi/ibmvscsi/ibmvfc-core.c
@@ -6726,6 +6726,17 @@ static int ibmvfc_alloc_channels(struct ibmvfc_host 
*vhost,
        if (!channels->scrqs)
                return -ENOMEM;
 
+       channels->async_scrq = kzalloc_obj(*channels->async_scrq, GFP_KERNEL);
+       if (!channels->async_scrq) {
+               rc = -ENOMEM;
+               goto free_scrqs;
+       }
+
+       rc = ibmvfc_alloc_queue(vhost, channels->async_scrq,
+                               IBMVFC_SUB_CRQ_FMT);
+       if (rc)
+               goto free_async;
+
        for (i = 0; i < channels->max_queues; i++) {
                scrq = &channels->scrqs[i];
                rc = ibmvfc_alloc_queue(vhost, scrq, IBMVFC_SUB_CRQ_FMT);
@@ -6734,13 +6745,21 @@ static int ibmvfc_alloc_channels(struct ibmvfc_host 
*vhost,
                                scrq = &channels->scrqs[j - 1];
                                ibmvfc_free_queue(vhost, scrq);
                        }
-                       kfree(channels->scrqs);
-                       channels->scrqs = NULL;
+                       ibmvfc_free_queue(vhost, channels->async_scrq);
                        channels->active_queues = 0;
-                       return rc;
+                       goto free_async;
                }
        }
 
+       return rc;
+
+free_async:
+       kfree(channels->async_scrq);
+       channels->async_scrq = NULL;
+free_scrqs:
+       kfree(channels->scrqs);
+       channels->scrqs = NULL;
+
        return rc;
 }
 
@@ -6782,8 +6801,15 @@ static void ibmvfc_release_channels(struct ibmvfc_host 
*vhost,
 
                kfree(channels->scrqs);
                channels->scrqs = NULL;
+
                channels->active_queues = 0;
        }
+
+       if (channels->async_scrq) {
+               ibmvfc_free_queue(vhost, channels->async_scrq);
+               kfree(channels->async_scrq);
+               channels->async_scrq = NULL;
+       }
 }
 
 static void ibmvfc_release_sub_crqs(struct ibmvfc_host *vhost)

-- 
2.55.0



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