[dpdk-dev] [PATCH] eal / malloc : alignment parameter check failing due to changes in rte_is_power_of_2

[Declan Doherty]

In commit 2fc8d6d the behaviour of function rte_is_power_of_2 was
changed to not return true for 0. memzone_reserve_aligned_thread_unsafe
and rte_malloc_socket both make the assumption that for align = 0
!rte_is_power_of_2(align) will return false. This patch adds a check
that align parameter is non-zero before doing the power of 2 check

Signed-off-by: Declan Doherty <declan.doherty at intel.com>
---
 lib/librte_eal/common/eal_common_memzone.c | 2 +-
 lib/librte_malloc/rte_malloc.c             | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/librte_eal/common/eal_common_memzone.c b/lib/librte_eal/common/eal_common_memzone.c
index b5a5d72..3f09338 100644
--- a/lib/librte_eal/common/eal_common_memzone.c
+++ b/lib/librte_eal/common/eal_common_memzone.c
@@ -156,7 +156,7 @@ memzone_reserve_aligned_thread_unsafe(const char *name, size_t len,
 	}
 
 	/* if alignment is not a power of two */
-	if (!rte_is_power_of_2(align)) {
+	if (align ? !rte_is_power_of_2(align) : 0) {
 		RTE_LOG(ERR, EAL, "%s(): Invalid alignment: %u\n", __func__,
 				align);
 		rte_errno = EINVAL;
diff --git a/lib/librte_malloc/rte_malloc.c b/lib/librte_malloc/rte_malloc.c
index b966fc7..15c7e20 100644
--- a/lib/librte_malloc/rte_malloc.c
+++ b/lib/librte_malloc/rte_malloc.c
@@ -75,7 +75,7 @@ rte_malloc_socket(const char *type, size_t size, unsigned align, int socket_arg)
 	void *ret;
 
 	/* return NULL if size is 0 or alignment is not power-of-2 */
-	if (size == 0 || !rte_is_power_of_2(align))
+	if (size == 0 || align ? !rte_is_power_of_2(align) : 0)
 		return NULL;
 
 	if (socket_arg == SOCKET_ID_ANY)
-- 
1.7.12.2