Patch "aacraid: Set correct msix count for EEH recovery" has been added to the 4.5-stable tree

Patch "aacraid: Set correct msix count for EEH recovery" has been added to the 4.5-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    aacraid: Set correct msix count for EEH recovery

to the 4.5-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     aacraid-set-correct-msix-count-for-eeh-recovery.patch
and it can be found in the queue-4.5 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From ecc479e00db8eb110b200afe1effcb3df20ca7ae Mon Sep 17 00:00:00 2001
From: Raghava Aditya Renukunta <raghavaaditya.renukunta@pmcs.com>
Date: Wed, 3 Feb 2016 15:06:03 -0800
Subject: aacraid: Set correct msix count for EEH recovery

From: Raghava Aditya Renukunta <raghavaaditya.renukunta@pmcs.com>

commit ecc479e00db8eb110b200afe1effcb3df20ca7ae upstream.

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
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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

--- a/drivers/scsi/aacraid/linit.c
+++ b/drivers/scsi/aacraid/linit.c
@@ -1404,8 +1404,18 @@ static int aac_acquire_resources(struct
 
 	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:


Patches currently in stable-queue which might be from raghavaaditya.renukunta@pmcs.com are

queue-4.5/aacraid-fix-memory-leak-in-aac_fib_map_free.patch
queue-4.5/aacraid-fix-rrq-overload.patch
queue-4.5/aacraid-set-correct-msix-count-for-eeh-recovery.patch