[PATCH] examples/multi_process: revert ports cleanup on exit

[Thomas Monjalon <thomas@monjalon.net>]

When closing the primary process, an error occurs when closing ports:

Error closing ports
EAL: failed to send to (/var/run/dpdk/dpdk_X/mp_socket_Y) due to Bad file descriptor
EAL: Fail to send request /var/run/dpdk/dpdk_X/mp_socket_Y:mp_malloc_sync
EAL: Could not send sync request to secondary process

And the secondary process crashes.

It may show several problems to fix in the next release.
Revert the fix causing these issues for 25.07 release.

Bugzilla ID: 1751
Fixes: 4382d58097b4 ("examples/multi_process: fix ports cleanup on exit")
Cc: stable@dpdk.org

Reported-by: Song Jiale <songx.jiale@intel.com>
Signed-off-by: Thomas Monjalon <thomas@monjalon.net>
---
 examples/multi_process/symmetric_mp/main.c | 27 ++++------------------
 1 file changed, 5 insertions(+), 22 deletions(-)

diff --git a/examples/multi_process/symmetric_mp/main.c b/examples/multi_process/symmetric_mp/main.c
index de16608a0f..f7d8439cd4 100644
--- a/examples/multi_process/symmetric_mp/main.c
+++ b/examples/multi_process/symmetric_mp/main.c
@@ -92,25 +92,6 @@ smp_usage(const char *prgname, const char *errmsg)
 	exit(1);
 }
 
-static void
-exit_cleanup(void)
-{
-	unsigned int i;
-
-	RTE_LOG(INFO, APP, "Close ports.\n");
-	for (i = 0; i < num_ports; i++) {
-		if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
-			if (rte_eth_dev_stop(ports[i]))
-				rte_exit(EXIT_FAILURE, "Error stopping ports\n");
-			if (rte_eth_dev_close(ports[i]))
-				rte_exit(EXIT_FAILURE, "Error closing ports\n");
-		}
-	}
-
-	/* clean up the EAL */
-	rte_eal_cleanup();
-	exit(0);
-}
 
 /* signal handler configured for SIGTERM and SIGINT to print stats on exit */
 static void
@@ -123,10 +104,9 @@ print_stats(int signum)
 		printf("Port %u: RX - %u, TX - %u, Drop - %u\n", (unsigned)p_num,
 				pstats[p_num].rx, pstats[p_num].tx, pstats[p_num].drop);
 	}
-	exit_cleanup();
+	exit(0);
 }
 
-
 /* Parse the argument given in the command line of the application */
 static int
 smp_parse_args(int argc, char **argv)
@@ -506,5 +486,8 @@ main(int argc, char **argv)
 
 	rte_eal_mp_remote_launch(lcore_main, NULL, CALL_MAIN);
 
-	exit_cleanup();
+	/* clean up the EAL */
+	rte_eal_cleanup();
+
+	return 0;
 }
-- 
2.47.1