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

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Sorry ... manipulation error

On 11/16/21 13:26, Pierre Morel wrote:
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));

--
Pierre Morel
IBM Lab Boeblingen



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