For each subsequent device assigned to the m4u_group after its initial allocation, we need to take an additional reference.
Signed-off-by: Robin Murphy <[email protected]> --- drivers/iommu/mtk_iommu_v1.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/iommu/mtk_iommu_v1.c b/drivers/iommu/mtk_iommu_v1.c index b8aeb0768483..1b736990373f 100644 --- a/drivers/iommu/mtk_iommu_v1.c +++ b/drivers/iommu/mtk_iommu_v1.c @@ -502,6 +502,8 @@ static struct iommu_group *mtk_iommu_device_group(struct device *dev) data->m4u_group = iommu_group_alloc(); if (IS_ERR(data->m4u_group)) dev_err(dev, "Failed to allocate M4U IOMMU group\n"); + } else { + __iommu_group_get(data->m4u_group); } return data->m4u_group; } -- 2.10.2.dirty _______________________________________________ iommu mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/iommu
