[kvm-unit-tests PATCH v2] s390x: fixing I/O memory allocation

[Pierre Morel <pmorel@xxxxxxxxxxxxx>]

The allocator allocate pages it follows the size must be rounded
to pages before the allocation.

Fixes: b0fe3988 "s390x: define UV compatible I/O allocation"

Signed-off-by: Pierre Morel <pmorel@xxxxxxxxxxxxx>
Reviewed-by: Claudio Imbrenda <imbrenda@xxxxxxxxxxxxx>
---
 lib/s390x/malloc_io.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/s390x/malloc_io.c b/lib/s390x/malloc_io.c
index 78582eac..080fc694 100644
--- a/lib/s390x/malloc_io.c
+++ b/lib/s390x/malloc_io.c
@@ -41,7 +41,7 @@ static void unshare_pages(void *p, int count)
 
 void *alloc_io_mem(int size, int flags)
 {
-	int order = get_order(size >> PAGE_SHIFT);
+	int order = get_order(PAGE_ALIGN(size) >> PAGE_SHIFT);
 	void *p;
 	int n;
 
@@ -62,7 +62,7 @@ void *alloc_io_mem(int size, int flags)
 
 void free_io_mem(void *p, int size)
 {
-	int order = get_order(size >> PAGE_SHIFT);
+	int order = get_order(PAGE_ALIGN(size) >> PAGE_SHIFT);
 
 	assert(IS_ALIGNED((uintptr_t)p, PAGE_SIZE));
 
-- 
2.25.1