1 files changed, 5 insertions, 2 deletions

diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c
index bb7888429be6..877baf2a94f4 100644
--- a/drivers/xen/swiotlb-xen.c
+++ b/drivers/xen/swiotlb-xen.c
@@ -214,10 +214,13 @@ retry:
         /*
          * Get IO TLB memory from any location.
          */
-        if (early)
+        if (early) {
                 xen_io_tlb_start = memblock_alloc(PAGE_ALIGN(bytes),
                                                   PAGE_SIZE);
-        else {
+                if (!xen_io_tlb_start)
+                        panic("%s: Failed to allocate %lu bytes align=0x%lx\n",
+                              __func__, PAGE_ALIGN(bytes), PAGE_SIZE);
+        } else {
 #define SLABS_PER_PAGE (1 << (PAGE_SHIFT - IO_TLB_SHIFT))
 #define IO_TLB_MIN_SLABS ((1<<20) >> IO_TLB_SHIFT)
                 while ((SLABS_PER_PAGE << order) > IO_TLB_MIN_SLABS) {