[PATCH 1/3] iommu/ipmmu-vmsa: Propagate errors from iommu_fwspec_add_ids()

[Koichiro Den <den@valinux.co.jp>]

iommu_fwspec_add_ids() can fail while extending the ID array. Ignoring
its return value lets IOMMU setup continue with missing micro-TLB IDs.

Propagate the error so of_iommu_configure() can discard the incomplete
fwspec.

Cc: stable@vger.kernel.org
Fixes: 7b2d59611fef ("iommu/ipmmu-vmsa: Replace local utlb code with fwspec ids")
Signed-off-by: Koichiro Den <den@valinux.co.jp>
---
 drivers/iommu/ipmmu-vmsa.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/iommu/ipmmu-vmsa.c b/drivers/iommu/ipmmu-vmsa.c
index 9386b752dea2..99586c68ef35 100644
--- a/drivers/iommu/ipmmu-vmsa.c
+++ b/drivers/iommu/ipmmu-vmsa.c
@@ -778,10 +778,14 @@ static bool ipmmu_device_is_allowed(struct device *dev)
 static int ipmmu_of_xlate(struct device *dev,
 			  const struct of_phandle_args *spec)
 {
+	int ret;
+
 	if (!ipmmu_device_is_allowed(dev))
 		return -ENODEV;
 
-	iommu_fwspec_add_ids(dev, spec->args, 1);
+	ret = iommu_fwspec_add_ids(dev, spec->args, 1);
+	if (ret)
+		return ret;
 
 	/* Initialize once - xlate() will call multiple times */
 	if (to_ipmmu(dev))
-- 
2.54.0