[PATCH][next] iommu/mediatek: Fix unsigned domid comparison with less than zero

[Colin King]

From: Colin Ian King <colin.k...@canonical.com>

Currently the check for domid < 0 is always false because domid
is unsigned.  Fix this by making it signed.

Addresses-CoverityL ("Unsigned comparison against 0")
Fixes: ab1d5281a62b ("iommu/mediatek: Add iova reserved function")
Signed-off-by: Colin Ian King <colin.k...@canonical.com>
---
 drivers/iommu/mtk_iommu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
index 0ad14a7604b1..823d719945b2 100644
--- a/drivers/iommu/mtk_iommu.c
+++ b/drivers/iommu/mtk_iommu.c
@@ -640,7 +640,7 @@ static void mtk_iommu_get_resv_regions(struct device *dev,
                                       struct list_head *head)
 {
        struct mtk_iommu_data *data = dev_iommu_priv_get(dev);
-       unsigned int domid = mtk_iommu_get_domain_id(dev, data->plat_data), i;
+       int domid = mtk_iommu_get_domain_id(dev, data->plat_data), i;
        const struct mtk_iommu_iova_region *resv, *curdom;
        struct iommu_resv_region *region;
        int prot = IOMMU_WRITE | IOMMU_READ;
-- 
2.29.2