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iommu/fsl: Fix the device domain attach condition.

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Store the domain information for the device, only if it's not already
attached to a domain.

Signed-off-by: Varun Sethi <Varun.Sethi@freescale.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Varun Sethi 2014-06-24 19:27:16 +05:30 committed by Joerg Roedel
parent d033f48f3a
commit 75f0e4615d
1 changed files with 2 additions and 7 deletions
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9
drivers/iommu/fsl_pamu_domain.c
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@ -335,11 +335,6 @@ static struct fsl_dma_domain *iommu_alloc_dma_domain(void)
return domain;
}
static inline struct device_domain_info *find_domain(struct device *dev)
{
return dev->archdata.iommu_domain;
}
static void remove_device_ref(struct device_domain_info *info, u32 win_cnt)
{
unsigned long flags;
@ -380,7 +375,7 @@ static void attach_device(struct fsl_dma_domain *dma_domain, int liodn, struct d
* Check here if the device is already attached to domain or not.
* If the device is already attached to a domain detach it.
*/
old_domain_info = find_domain(dev);
old_domain_info = dev->archdata.iommu_domain;
if (old_domain_info && old_domain_info->domain != dma_domain) {
spin_unlock_irqrestore(&device_domain_lock, flags);
detach_device(dev, old_domain_info->domain);
@ -399,7 +394,7 @@ static void attach_device(struct fsl_dma_domain *dma_domain, int liodn, struct d
* the info for the first LIODN as all
* LIODNs share the same domain
*/
if (!old_domain_info)
if (!dev->archdata.iommu_domain)
dev->archdata.iommu_domain = info;
spin_unlock_irqrestore(&device_domain_lock, flags);