iommu/amd: Take into account that alloc_dev_data() may return NULL
[ Upstream commitpull/10/head39ffe39545
] find_dev_data() does not check whether the return value alloc_dev_data() is NULL. This was okay once because the pointer was returned once as-is. Since commitdf3f7a6e8e
("iommu/amd: Use is_attach_deferred call-back") the pointer may be used within find_dev_data() so a NULL check is required. Cc: Baoquan He <bhe@redhat.com> Fixes:df3f7a6e8e
("iommu/amd: Use is_attach_deferred call-back") Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Joerg Roedel <jroedel@suse.de> Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
parent
6bc2bf6023
commit
1366b31d18
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@ -311,6 +311,8 @@ static struct iommu_dev_data *find_dev_data(u16 devid)
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if (dev_data == NULL) {
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dev_data = alloc_dev_data(devid);
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if (!dev_data)
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return NULL;
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if (translation_pre_enabled(iommu))
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dev_data->defer_attach = true;
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