linux-kernel - [PATCH 4/7] iommu/vt-d: Make context clearing consistent with context mapping

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Date:   Wed, 22 Nov 2023 11:26:05 +0800
From:   Lu Baolu <baolu.lu@...ux.intel.com>
To:     Joerg Roedel <joro@...tes.org>
Cc:     mohd.syazwan.abdul.halim@...el.com,
        Kunwu Chan <chentao@...inos.cn>, iommu@...ts.linux.dev,
        linux-kernel@...r.kernel.org
Subject: [PATCH 4/7] iommu/vt-d: Make context clearing consistent with context mapping

In the iommu probe_device path, domain_context_mapping() allows setting
up the context entry for a non-PCI device. However, in the iommu
release_device path, domain_context_clear() only clears context entries
for PCI devices.

Make domain_context_clear() behave consistently with
domain_context_mapping() by clearing context entries for both PCI and
non-PCI devices.

Fixes: 579305f75d34 ("iommu/vt-d: Update to use PCI DMA aliases")
Signed-off-by: Lu Baolu <baolu.lu@...ux.intel.com>
Reviewed-by: Kevin Tian <kevin.tian@...el.com>
Link: https://lore.kernel.org/r/20231114011036.70142-4-baolu.lu@linux.intel.com
---
 drivers/iommu/intel/iommu.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c
index 9bddd4fbbdf8..4c257ccf9dc3 100644
--- a/drivers/iommu/intel/iommu.c
+++ b/drivers/iommu/intel/iommu.c
@@ -3928,8 +3928,8 @@ static int domain_context_clear_one_cb(struct pci_dev *pdev, u16 alias, void *op
  */
 static void domain_context_clear(struct device_domain_info *info)
 {
-	if (!info->iommu || !info->dev || !dev_is_pci(info->dev))
-		return;
+	if (!dev_is_pci(info->dev))
+		domain_context_clear_one(info, info->bus, info->devfn);
 
 	pci_for_each_dma_alias(to_pci_dev(info->dev),
 			       &domain_context_clear_one_cb, info);
-- 
2.34.1