mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-09-26 04:16:39 +00:00
Code Issues Releases Wiki Activity

iommu/sva: Fix SVA handle sharing in multi device case

Browse source 
iommu_sva_bind_device will directly goto out in multi-device
case when found existing domain, ignoring list_add handle,
which causes the handle to fail to be shared.

Fixes: 65d4418c50 ("iommu/sva: Restore SVA handle sharing")
Signed-off-by: Zhangfei Gao <zhangfei.gao@linaro.org>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Link: https://lore.kernel.org/r/20240227064821.128-1-zhangfei.gao@linaro.org
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Zhangfei Gao 2024-02-27 06:48:21 +00:00 committed by Joerg Roedel
parent d206a76d7d
commit 6384c56c99
1 changed files with 2 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
drivers/iommu/iommu-sva.c
View file

@ -117,11 +117,11 @@ struct iommu_sva *iommu_sva_bind_device(struct device *dev, struct mm_struct *mm
if (ret)
goto out_free_domain;
domain->users = 1;
refcount_set(&handle->users, 1);
list_add(&domain->next, &mm->iommu_mm->sva_domains);
list_add(&handle->handle_item, &mm->iommu_mm->sva_handles);
out:
refcount_set(&handle->users, 1);
list_add(&handle->handle_item, &mm->iommu_mm->sva_handles);
mutex_unlock(&iommu_sva_lock);
handle->dev = dev;
handle->domain = domain;