aacraid: Set correct msix count for EEH recovery

During EEH recovery number of online CPU's might change thereby changing
the number of MSIx vectors. Since each fib is allocated to a vector,
changes in the number of vectors causes fib to be sent thru invalid
vectors.In addition the correct number of MSIx vectors is not updated in
the INIT struct sent to the controller, when it is reinitialized.

Fixed by reassigning vectors to fibs based on the updated number of MSIx
vectors and updating the INIT structure before sending to controller.

Fixes: MSI-X vector calculation for suspend/resume
Cc: stable@vger.kernel.org
Signed-off-by: Raghava Aditya Renukunta <raghavaaditya.renukunta@pmcs.com>
Reviewed-by: Shane Seymour <shane.seymour@hpe.com>
Reviewed-by: Johannes Thumshirn <jthushirn@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
(cherry picked from commit ecc479e00db8eb110b200afe1effcb3df20ca7ae)

Orabug: 25505509
Signed-off-by: Dhaval Giani <dhaval.giani@oracle.com>

diff --git a/drivers/scsi/aacraid/linit.c b/drivers/scsi/aacraid/linit.c
index 563f915757883b33e25763f90f2c8b3885526cad..73805025bf51950111fbcef64e1d3b2fe53714e2 100644 (file)
--- a/drivers/scsi/aacraid/linit.c
+++ b/drivers/scsi/aacraid/linit.c
@@ -1405,8 +1405,18 @@ static int aac_acquire_resources(struct aac_dev *dev)
 
        aac_adapter_enable_int(dev);
 
-       if (!dev->sync_mode)
+       /*max msix may change  after EEH
+        * Re-assign vectors to fibs
+        */
+       aac_fib_vector_assign(dev);
+
+       if (!dev->sync_mode) {
+               /* After EEH recovery or suspend resume, max_msix count
+                * may change, therfore updating in init as well.
+                */
                aac_adapter_start(dev);
+               dev->init->Sa_MSIXVectors = cpu_to_le32(dev->max_msix);
+       }
        return 0;
 
 error_iounmap: