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iommu/vt-d: Check for allocation failure in aux_detach_device() 

In current kernels small allocations never fail, but checking for
allocation failure is the correct thing to do.

Fixes: 18abda7a2d ("iommu/vt-d: Fix general protection fault in aux_detach_device()")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Lu Baolu <baolu.lu@linux.intel.com>
Link: https://lore.kernel.org/r/YJuobKuSn81dOPLd@mwanda
Link: https://lore.kernel.org/r/20210519015027.108468-2-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Dan Carpenter 2021-05-19 09:50:26 +08:00 committed by Joerg Roedel
parent 382d91fc0f
commit 1a590a1c8b
1 changed files with 2 additions and 0 deletions
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2
drivers/iommu/intel/iommu.c
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@ -4606,6 +4606,8 @@ static int auxiliary_link_device(struct dmar_domain *domain,
if (!sinfo) {
sinfo = kzalloc(sizeof(*sinfo), GFP_ATOMIC);
if (!sinfo)
return -ENOMEM;
sinfo->domain = domain;
sinfo->pdev = dev;
list_add(&sinfo->link_phys, &info->subdevices);