iommu/vt-d: Fix incorrect pci_for_each_dma_alias() for non-PCI devices
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: 9a16ab9d6402 ("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>
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@ -4090,8 +4090,10 @@ static int domain_context_clear_one_cb(struct pci_dev *pdev, u16 alias, void *op
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*/
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static void domain_context_clear(struct device_domain_info *info)
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{
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if (!dev_is_pci(info->dev))
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if (!dev_is_pci(info->dev)) {
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domain_context_clear_one(info, info->bus, info->devfn);
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return;
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}
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pci_for_each_dma_alias(to_pci_dev(info->dev),
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&domain_context_clear_one_cb, info);
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