On Wed, 25 Aug 2021 18:20:21 +0200
Pierre Morel <pmorel@xxxxxxxxxxxxx> 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));
>
