iova: Remove magazine BUG_ON() checks

Two of the magazine helpers have BUG_ON() checks, as follows:
- iova_magazine_pop() - here we ensure that the mag is not empty. However
  we already ensure that in the only caller, __iova_rcache_get().
- iova_magazine_push() - here we ensure that the mag is not full. However
  we already ensure that in the only caller, __iova_rcache_insert().

As described, the two bug checks are pointless so drop them.

Signed-off-by: John Garry <john.garry@huawei.com>
Acked-by: Robin Murphy <robin.murphy@arm.com>
Reviewed-by: Jerry Snitselaar <jsnitsel@redhat.com>
Link: https://lore.kernel.org/r/1662557681-145906-3-git-send-email-john.garry@huawei.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>

diff --git a/drivers/iommu/iova.c b/drivers/iommu/iova.c
index 580fdf6..8aece05 100644 (file)
--- a/drivers/iommu/iova.c
+++ b/drivers/iommu/iova.c
@@ -694,8 +694,6 @@ static unsigned long iova_magazine_pop(struct iova_magazine *mag,
        int i;
        unsigned long pfn;
 
-       BUG_ON(iova_magazine_empty(mag));
-
        /* Only fall back to the rbtree if we have no suitable pfns at all */
        for (i = mag->size - 1; mag->pfns[i] > limit_pfn; i--)
                if (i == 0)
@@ -710,8 +708,6 @@ static unsigned long iova_magazine_pop(struct iova_magazine *mag,
 
 static void iova_magazine_push(struct iova_magazine *mag, unsigned long pfn)
 {
-       BUG_ON(iova_magazine_full(mag));
-
        mag->pfns[mag->size++] = pfn;
 }