[dpdk-dev] [PATCH v2 1/2] l3fwd-power: exit if initializing power library failed

[Anatoly Burakov]

Currently, if power library initialization fails, only a log message is
displayed. This is suboptimal for a number of reasons, but the main one
is that telemetry mode does not depend on the power library and can
therefore run in environments where l3fwd-power would normally not run
correctly (such as inside a VM). This will lead to attempts to
deinitialize the power library on exit, with a subsequent forced unclean
shutdown of DPDK.

Fix this by only initializing the power library in modes that actually
need it, and change a log message to a failure to initialize.

Signed-off-by: Anatoly Burakov <anatoly.bura...@intel.com>
Acked-by: David Hunt <david.h...@intel.com>
Reviewed-by: Reshma Pattan <reshma.pat...@intel.com>
---
 examples/l3fwd-power/main.c | 20 +++++++++++---------
 1 file changed, 11 insertions(+), 9 deletions(-)

diff --git a/examples/l3fwd-power/main.c b/examples/l3fwd-power/main.c
index b46aa7bac..be50ec049 100644
--- a/examples/l3fwd-power/main.c
+++ b/examples/l3fwd-power/main.c
@@ -2065,15 +2065,17 @@ static int check_ptype(uint16_t portid)
 static int
 init_power_library(void)
 {
-       int ret = 0, lcore_id;
-       for (lcore_id = 0; lcore_id < RTE_MAX_LCORE; lcore_id++) {
-               if (rte_lcore_is_enabled(lcore_id)) {
-                       /* init power management library */
-                       ret = rte_power_init(lcore_id);
-                       if (ret)
-                               RTE_LOG(ERR, POWER,
+       unsigned int lcore_id;
+       int ret = 0;
+
+       RTE_LCORE_FOREACH(lcore_id) {
+               /* init power management library */
+               ret = rte_power_init(lcore_id);
+               if (ret) {
+                       RTE_LOG(ERR, POWER,
                                "Library initialization failed on core %u\n",
                                lcore_id);
+                       return ret;
                }
        }
        return ret;
@@ -2224,8 +2226,8 @@ main(int argc, char **argv)
        if (ret < 0)
                rte_exit(EXIT_FAILURE, "Invalid L3FWD parameters\n");
 
-       if (init_power_library())
-               RTE_LOG(ERR, L3FWD_POWER, "init_power_library failed\n");
+       if (app_mode != APP_MODE_TELEMETRY && init_power_library())
+               rte_exit(EXIT_FAILURE, "init_power_library failed\n");
 
        if (update_lcore_params() < 0)
                rte_exit(EXIT_FAILURE, "update_lcore_params failed\n");
-- 
2.17.1