commit 42081173c74e0867b996f5fd6b46d3c1606377c7
author Sreekanth Reddy <sreekanth.reddy@avagotech.com> Wed Nov 11 17:30:26 2015 +0530
committer Martin K. Petersen <martin.petersen@oracle.com> Wed Nov 11 18:42:44 2015 -0500
tree ec891a32769c4badd4828d3fc07ef08ac39374f5
parent 45506049c7abd4c17c35ad43adc07bf1236a3fcf

mpt3sas: Manage MSI-X vectors according to HBA device type

1. Do not enable MSI-X vectors for SAS2008 B0 controllers

2. Enable a single MSI-X vector for the following controller:

   a. SAS2004
   b. SAS2008
   c. SAS2008_1
   d. SAS2008_2
   e. SAS2008_3
   f. SAS2116_1
   g. SAS2116_2

3. Enable Combined Reply Post Queue Support (i.e. 96 MSI-X vectors)
   for Gen3 Invader/Fury C0 and above revision HBAs

4. Enable Combined Reply Post Queue Support (i.e. 96 MSI-X vectors)
   for all Intruder and Cutlass HBAs

Signed-off-by: Sreekanth Reddy <Sreekanth.Reddy@avagotech.com>
Acked-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/mpt3sas/mpt3sas_scsih.c

diff --git a/drivers/scsi/mpt3sas/mpt3sas_scsih.c b/drivers/scsi/mpt3sas/mpt3sas_scsih.c
index 80469d0..2b51a41 100644
--- a/drivers/scsi/mpt3sas/mpt3sas_scsih.c
+++ b/drivers/scsi/mpt3sas/mpt3sas_scsih.c
@@ -7938,6 +7938,13 @@
 	case MPI25_MFGPAGE_DEVID_SAS3108_5:
 	case MPI25_MFGPAGE_DEVID_SAS3108_6:
 		ioc->hba_mpi_version_belonged = MPI25_VERSION;
+
+		/* Check whether the controller revision is C0 or above.
+		 * only C0 and above revision controllers support 96 MSI-X
+		 * vectors.
+		 */
+		if (ioc->pdev->revision >= SAS3_PCI_DEVICE_C0_REVISION)
+			ioc->msix96_vector = 1;
 		break;
 	}
 }