diff mbox

[V6,05/10] aacraid: Set correct msix count for EEH recovery

Message ID 1454540768-12271-6-git-send-email-RaghavaAditya.Renukunta@pmcs.com (mailing list archive)
State Accepted, archived
Headers show

Commit Message

Raghava Aditya Renukunta Feb. 3, 2016, 11:06 p.m. UTC 
From: Raghava Aditya Renukunta <raghavaaditya.renukunta@pmcs.com>

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.

Changes in V2:
Replaced fib vector allocation code with aac_fib_vector_assign

Changes in V3:
None

Changes in V4:
None

Changes in V5:
None

Changes in V6:
None

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>
---
 drivers/scsi/aacraid/linit.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)
diff mbox

Patch

diff --git a/drivers/scsi/aacraid/linit.c b/drivers/scsi/aacraid/linit.c
index 822b695..5117220 100644
--- a/drivers/scsi/aacraid/linit.c
+++ b/drivers/scsi/aacraid/linit.c
@@ -1409,8 +1409,18 @@  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: