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iommu: Checking for NULL instead of IS_ERR 

The iommu_group_alloc() and iommu_group_get_for_dev()
functions return error pointers, they never return NULL.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Dan Carpenter 2015-06-10 13:59:27 +03:00 committed by Joerg Roedel
parent 3a18404cd9
commit 409e553dee
1 changed files with 12 additions and 11 deletions
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23
drivers/iommu/iommu.c
View File

@ -788,15 +788,16 @@ static struct iommu_group *iommu_group_get_for_pci_dev(struct pci_dev *pdev)
/* No shared group found, allocate new */
group = iommu_group_alloc();
if (group) {
/*
* Try to allocate a default domain - needs support from the
* IOMMU driver.
*/
group->default_domain = __iommu_domain_alloc(pdev->dev.bus,
IOMMU_DOMAIN_DMA);
group->domain = group->default_domain;
}
if (IS_ERR(group))
return NULL;
/*
* Try to allocate a default domain - needs support from the
* IOMMU driver.
*/
group->default_domain = __iommu_domain_alloc(pdev->dev.bus,
IOMMU_DOMAIN_DMA);
group->domain = group->default_domain;
return group;
}
@ -1548,8 +1549,8 @@ int iommu_request_dm_for_dev(struct device *dev)
/* Device must already be in a group before calling this function */
group = iommu_group_get_for_dev(dev);
if (!group)
return -EINVAL;
if (IS_ERR(group))
return PTR_ERR(group);
mutex_lock(&group->mutex);