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iommu/rockchip: Fix error handling in attach 

Currently if the driver encounters an error while attaching device, it
will leave the IOMMU in an inconsistent state. Even though it shouldn't
really happen in reality, let's just add proper error path to keep
things consistent.

Signed-off-by: Tomasz Figa <tfiga@chromium.org>
Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Tomasz Figa 2018-03-23 15:38:04 +08:00 committed by Joerg Roedel
parent d0b912bd4c
commit f6717d727c
1 changed files with 4 additions and 4 deletions
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8
drivers/iommu/rockchip-iommu.c
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@ -824,7 +824,7 @@ static int rk_iommu_attach_device(struct iommu_domain *domain,
ret = rk_iommu_force_reset(iommu);
if (ret)
return ret;
goto out_disable_stall;
iommu->domain = domain;
@ -837,7 +837,7 @@ static int rk_iommu_attach_device(struct iommu_domain *domain,
ret = rk_iommu_enable_paging(iommu);
if (ret)
return ret;
goto out_disable_stall;
spin_lock_irqsave(&rk_domain->iommus_lock, flags);
list_add_tail(&iommu->node, &rk_domain->iommus);
@ -845,9 +845,9 @@ static int rk_iommu_attach_device(struct iommu_domain *domain,
dev_dbg(dev, "Attached to iommu domain\n");
out_disable_stall:
rk_iommu_disable_stall(iommu);
return 0;
return ret;
}
static void rk_iommu_detach_device(struct iommu_domain *domain,