Re: [PATCH] BNX2I: register given device with cnic if shost != NULL in ep_connect()

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On 07/09/2009 09:39 AM, Anil Veerabhadrappa wrote:
On Thu, 2009-07-09 at 00:15 -0700, Michael Chan wrote:
Mike Christie wrote:
Anil Veerabhadrappa wrote:
diff --git a/drivers/scsi/bnx2i/bnx2i_iscsi.c
b/drivers/scsi/bnx2i/bnx2i_iscsi.c
index f741219..98148f3 100644
--- a/drivers/scsi/bnx2i/bnx2i_iscsi.c
+++ b/drivers/scsi/bnx2i/bnx2i_iscsi.c
@@ -1653,15 +1653,18 @@ static struct iscsi_endpoint
*bnx2i_ep_connect(struct Scsi_Host *shost,
     struct iscsi_endpoint *ep;
     int rc = 0;

-   if (shost)
+   if (shost) {
             /* driver is given scsi host to work with */
             hba = iscsi_host_priv(shost);
-   else
+           /* Register the device with cnic if not already
done so */
+           bnx2i_register_device(hba);
+   } else
             /*
              * check if the given destination can be reached through
              * a iscsi capable NetXtreme2 device
              */
             hba = bnx2i_check_route(dst_addr);
+
     if (!hba) {
             rc = -ENOMEM;
             goto check_busy;
Do you want to do the test_bit(BNX2I_CNIC_REGISTERED,
&hba->reg_with_cnic) test here instead of down below. If it
failed then
you might try to do a cm_create on a cnic that is not
properly registered.

Good idea.  cm_create() will properly be ok because there is no
hardware interaction.  bnx2i_send_conn_ofld_req() will fail if
the cnic is not properly registered because there will be no call
backs from the hardware events.

following 2 conditions needs to be satisfied to offload an iscsi
connection,
   1) device has to be registered with cnic
   2) device has to support iscsi offload

   bnx2i_adapter_ready() will return success only if both conditions
(which is flagged by ADAPTER_STATE_UP bit in hba->adapter_state) are
met. bnx2i_ep_connect() will bailout if bnx2i_adapter_ready() does not
return correct status and this guarantees bnx2i will not make any cnic
calls on an unregistered device.


Ok then. It seems fine to me.

Reviewed-by Mike Christie <michaelc@xxxxxxxxxxx>

One other question though. Do you need the BNX2I_CNIC_REGISTERED tst in ep_connect then? If not then maybe in separate patch for the next feature window we can clean that up.

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