This is a note to let you know that I've just added the patch titled
iommu/amd: Skip attach device domain is same as new domain
to the 6.2-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:
iommu-amd-skip-attach-device-domain-is-same-as-new-domain.patch
and it can be found in the queue-6.2 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From f451c7a5a3b818ecfeba2ba258570769998baf3a Mon Sep 17 00:00:00 2001
From: Vasant Hegde <vasant.hegde@xxxxxxx>
Date: Wed, 15 Feb 2023 05:26:41 +0000
Subject: iommu/amd: Skip attach device domain is same as new domain
From: Vasant Hegde <vasant.hegde@xxxxxxx>
commit f451c7a5a3b818ecfeba2ba258570769998baf3a upstream.
If device->domain is same as new domain then we can skip the
device attach process.
Signed-off-by: Vasant Hegde <vasant.hegde@xxxxxxx>
Link: https://lore.kernel.org/r/20230215052642.6016-2-vasant.hegde@xxxxxxx
Signed-off-by: Joerg Roedel <jroedel@xxxxxxx>
Cc: "Limonciello, Mario" <Mario.Limonciello@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/iommu/amd/iommu.c | 7 +++++++
1 file changed, 7 insertions(+)
--- a/drivers/iommu/amd/iommu.c
+++ b/drivers/iommu/amd/iommu.c
@@ -2161,6 +2161,13 @@ static int amd_iommu_attach_device(struc
struct amd_iommu *iommu = rlookup_amd_iommu(dev);
int ret;
+ /*
+ * Skip attach device to domain if new domain is same as
+ * devices current domain
+ */
+ if (dev_data->domain == domain)
+ return 0;
+
dev_data->defer_attach = false;
if (dev_data->domain)
Patches currently in stable-queue which might be from vasant.hegde@xxxxxxx are
queue-6.2/iommu-attach-device-group-to-old-domain-in-error-path.patch
queue-6.2/iommu-amd-improve-page-fault-error-reporting.patch
queue-6.2/iommu-amd-fix-error-handling-for-pdev_pri_ats_enable.patch
queue-6.2/iommu-amd-skip-attach-device-domain-is-same-as-new-domain.patch
