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iommu/vt-d: Fix incorrect pci_for_each_dma_alias() for non-PCI devices

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BugLink: https://bugs.launchpad.net/bugs/2097393

commit 6e02a277f1db24fa039e23783c8921c7b0e5b1b3 upstream.

Previously, the domain_context_clear() function incorrectly called
pci_for_each_dma_alias() to set up context entries for non-PCI devices.
This could lead to kernel hangs or other unexpected behavior.

Add a check to only call pci_for_each_dma_alias() for PCI devices. For
non-PCI devices, domain_context_clear_one() is called directly.

Reported-by: Todd Brandt <todd.e.brandt@intel.com>
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=219363
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=219349
Fixes: 9a16ab9d64 ("iommu/vt-d: Make context clearing consistent with context mapping")
Cc: stable@vger.kernel.org
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Link: https://lore.kernel.org/r/20241014013744.102197-2-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Manuel Diewald <manuel.diewald@canonical.com>
Signed-off-by: Koichiro Den <koichiro.den@canonical.com>
This commit is contained in:
Lu Baolu
2024-10-14 09:37:44 +08:00
committed by Mehmet Basaran
parent bcf6351e4d
commit 3dadde5efa
1 changed files with 3 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files
drivers/iommu/intel/iommu.c
+3 -1
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@@ -3883,8 +3883,10 @@ 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 (!dev_is_pci(info->dev))
if (!dev_is_pci(info->dev)) {
domain_context_clear_one(info, info->bus, info->devfn);
return;
}
pci_for_each_dma_alias(to_pci_dev(info->dev),
&domain_context_clear_one_cb, info);