service: propagate init error in EAL

[ upstream commit de6aede ]

Currently, when rte_service_init() fails at initialization, the
application always gets a ENOEXEC error code. For example, with testpmd,
this is displayed as:

  Cannot init EAL: Exec format error

This error code does not describe the real issue. Instead, use the error
code returned by the function.

Fixes: e398245 ("service: initialize with EAL")

Signed-off-by: Olivier Matz <olivier.matz@6wind.com>
Acked-by: Harry van Haaren <harry.van.haaren@intel.com>

lib/librte_eal/freebsd/eal.c

@@ -906,7 +906,7 @@ rte_eal_init(int argc, char **argv)
 	ret = rte_service_init();
 	if (ret) {
 		rte_eal_init_alert("rte_service_init() failed");
-		rte_errno = ENOEXEC;
+		rte_errno = -ret;
 		return -1;
 	}
 
@@ -922,7 +922,7 @@ rte_eal_init(int argc, char **argv)
 	 */
 	ret = rte_service_start_with_defaults();
 	if (ret < 0 && ret != -ENOTSUP) {
-		rte_errno = ENOEXEC;
+		rte_errno = -ret;
 		return -1;
 	}
 

lib/librte_eal/linux/eal.c

@@ -1273,7 +1273,7 @@ rte_eal_init(int argc, char **argv)
 	ret = rte_service_init();
 	if (ret) {
 		rte_eal_init_alert("rte_service_init() failed");
-		rte_errno = ENOEXEC;
+		rte_errno = -ret;
 		return -1;
 	}
 
@@ -1295,7 +1295,7 @@ rte_eal_init(int argc, char **argv)
 	 */
 	ret = rte_service_start_with_defaults();
 	if (ret < 0 && ret != -ENOTSUP) {
-		rte_errno = ENOEXEC;
+		rte_errno = -ret;
 		return -1;
 	}
 

lib/librte_eal/windows/eal.c

@@ -264,6 +264,7 @@ rte_eal_init(int argc, char **argv)
 	const struct rte_config *config = rte_eal_get_configuration();
 	struct internal_config *internal_conf =
 		eal_get_internal_configuration();
+	int ret;
 
 	rte_eal_log_init(NULL, 0);
 
@@ -387,9 +388,10 @@ rte_eal_init(int argc, char **argv)
 	}
 
 	/* Initialize services so drivers can register services during probe. */
-	if (rte_service_init()) {
+	ret = rte_service_init();
+	if (ret) {
 		rte_eal_init_alert("rte_service_init() failed");
-		rte_errno = ENOEXEC;
+		rte_errno = -ret;
 		return -1;
 	}