From: Rafal Kozik <r...@semihalf.com>
When use GENMASK_ULL(63,0) left shift by 64 bits is performed.
Shifting by number greater or equal then word length
is undefined operation and failed on some platforms.
Fixes: 9ba7981ec992 ("ena: add communication layer for DPDK")
Signed-off-by: Rafal Kozik <r...@semihalf.com>
Acked-by: Michal Krawczyk <m...@semihalf.com>
---
drivers/net/ena/base/ena_plat_dpdk.h | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ena/base/ena_plat_dpdk.h
b/drivers/net/ena/base/ena_plat_dpdk.h
index 22d7a9cb1..8a04e84b9 100644
--- a/drivers/net/ena/base/ena_plat_dpdk.h
+++ b/drivers/net/ena/base/ena_plat_dpdk.h
@@ -116,11 +116,13 @@ typedef uint64_t dma_addr_t;
#define ENA_MIN16(x, y) RTE_MIN((x), (y))
#define ENA_MIN8(x, y) RTE_MIN((x), (y))
+#define BITS_PER_LONG_LONG (__SIZEOF_LONG_LONG__ * 8)
#define U64_C(x) x ## ULL
#define BIT(nr) (1UL << (nr))
#define BITS_PER_LONG (__SIZEOF_LONG__ * 8)
#define GENMASK(h, l) (((~0UL) << (l)) & (~0UL >> (BITS_PER_LONG - 1 - (h))))
-#define GENMASK_ULL(h, l) (((U64_C(1) << ((h) - (l) + 1)) - 1) << (l))
+#define GENMASK_ULL(h, l) (((~0ULL) - (1ULL << (l)) + 1) & \
+ (~0ULL >> (BITS_PER_LONG_LONG - 1 - (h))))
#ifdef RTE_LIBRTE_ENA_COM_DEBUG
#define ena_trc_dbg(format, arg...) \
--
2.14.1
