This is a note to let you know that I've just added the patch titled
scsi: megaraid_sas: Enable msix_load_balance for Invader and later controllers
to the 4.19-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:
scsi-megaraid_sas-enable-msix_load_balance-for-invad.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 962c0057ed825197461b1da5a257299061c1f748
Author: Shivasharan S <shivasharan.srikanteshwara@xxxxxxxxxxxx>
Date: Fri Jun 28 02:50:39 2019 -0700
scsi: megaraid_sas: Enable msix_load_balance for Invader and later controllers
[ Upstream commit 1175b88452cad208894412b955ee698934968aed ]
Load balancing IO completions across all available MSI-X vectors should be
enabled for Invader and later generation controllers only. This needs to
be disabled for older controllers. Add an adapter type check before
setting msix_load_balance flag.
Fixes: 1d15d9098ad1 ("scsi: megaraid_sas: Load balance completions across all MSI-X")
Signed-off-by: Shivasharan S <shivasharan.srikanteshwara@xxxxxxxxxxxx>
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c b/drivers/scsi/megaraid/megaraid_sas_base.c
index bdfa36712fcc4..ac4800fb1a7fb 100644
--- a/drivers/scsi/megaraid/megaraid_sas_base.c
+++ b/drivers/scsi/megaraid/megaraid_sas_base.c
@@ -5364,7 +5364,8 @@ static int megasas_init_fw(struct megasas_instance *instance)
instance->is_rdpq = (scratch_pad_2 & MR_RDPQ_MODE_OFFSET) ?
1 : 0;
- if (!instance->msix_combined) {
+ if (instance->adapter_type >= INVADER_SERIES &&
+ !instance->msix_combined) {
instance->msix_load_balance = true;
instance->smp_affinity_enable = false;
}
