[dpdk-stable] [PATCH dpdk-dev] rte_random: fix crash when random init

[xiangxia.m.yue at gmail.com]

From: Tonghao Zhang <xiangxia.m.yue at gmail.com>

When rte_rand_init is invoked, and the kernel
(kernel version < 3.17) running dpdk does't support
*getentropy, at the same time, the cpu does't support
rdseed, the rte_rand_init will invoke rte_get_timer_cycles
which function will invoke rte_get_hpet_cycles
(RTE_LIBEAL_USE_HPET was enabled) while *eal_hpet is not
allocated.

Fixes: faf8fd252785 ("eal: improve entropy for initial PRNG seed")
Fixes: 3f002f069612 ("eal: replace libc-based random generation with LFSR")

Cc: stable at dpdk.org

Signed-off-by: Tonghao Zhang <xiangxia.m.yue at gmail.com>
---
 lib/librte_eal/linux/eal_timer.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/librte_eal/linux/eal_timer.c b/lib/librte_eal/linux/eal_timer.c
index a904a8297cd2..4067e46da534 100644
--- a/lib/librte_eal/linux/eal_timer.c
+++ b/lib/librte_eal/linux/eal_timer.c
@@ -26,7 +26,7 @@
 #include "eal_private.h"
 #include "eal_internal_cfg.h"
 
-enum timer_source eal_timer_source = EAL_TIMER_HPET;
+enum timer_source eal_timer_source = EAL_TIMER_TSC;
 
 #ifdef RTE_LIBEAL_USE_HPET
 
-- 
1.8.3.1