From: Aaron Conole <aconole@redhat.com>
Date: Wed, 22 Mar 2017 20:19:35 +0000 (-0400)
Subject: eal: do not panic on interrupt thread init
X-Git-Tag: spdx-start~4406
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=c050e5abae75b7d8f3332f410c44aa9cd904c384;p=dpdk.git

eal: do not panic on interrupt thread init

There could be some confusion as to why the call failed - this change
will always reflect the value of the error in rte_error.

When initializing the interrupt thread, there are a number of possible
reasons for failure - some of which are correctable by the application.
Do not panic() needlessly, and give the application a change to reflect
this information to the user.

Signed-off-by: Aaron Conole <aconole@redhat.com>
Acked-by: Bruce Richardson <bruce.richardson@intel.com>
---

diff --git a/lib/librte_eal/bsdapp/eal/eal.c b/lib/librte_eal/bsdapp/eal/eal.c
index ff4225f388..0c157b4520 100644
--- a/lib/librte_eal/bsdapp/eal/eal.c
+++ b/lib/librte_eal/bsdapp/eal/eal.c
@@ -593,8 +593,10 @@ rte_eal_init(int argc, char **argv)
 		return -1;
 	}
 
-	if (rte_eal_intr_init() < 0)
-		rte_panic("Cannot init interrupt-handling thread\n");
+	if (rte_eal_intr_init() < 0) {
+		rte_eal_init_alert("Cannot init interrupt-handling thread\n");
+		return -1;
+	}
 
 	if (rte_eal_timer_init() < 0) {
 		rte_eal_init_alert("Cannot init HPET or TSC timers\n");
diff --git a/lib/librte_eal/linuxapp/eal/eal.c b/lib/librte_eal/linuxapp/eal/eal.c
index 9fb5421ada..ecf567a21a 100644
--- a/lib/librte_eal/linuxapp/eal/eal.c
+++ b/lib/librte_eal/linuxapp/eal/eal.c
@@ -890,8 +890,10 @@ rte_eal_init(int argc, char **argv)
 		rte_config.master_lcore, (int)thread_id, cpuset,
 		ret == 0 ? "" : "...");
 
-	if (rte_eal_intr_init() < 0)
-		rte_panic("Cannot init interrupt-handling thread\n");
+	if (rte_eal_intr_init() < 0) {
+		rte_eal_init_alert("Cannot init interrupt-handling thread\n");
+		return -1;
+	}
 
 	if (rte_bus_scan())
 		rte_panic("Cannot scan the buses for devices\n");
diff --git a/lib/librte_eal/linuxapp/eal/eal_interrupts.c b/lib/librte_eal/linuxapp/eal/eal_interrupts.c
index 92a19cb860..5bb833e0f8 100644
--- a/lib/librte_eal/linuxapp/eal/eal_interrupts.c
+++ b/lib/librte_eal/linuxapp/eal/eal_interrupts.c
@@ -898,13 +898,16 @@ rte_eal_intr_init(void)
 	 * create a pipe which will be waited by epoll and notified to
 	 * rebuild the wait list of epoll.
 	 */
-	if (pipe(intr_pipe.pipefd) < 0)
+	if (pipe(intr_pipe.pipefd) < 0) {
+		rte_errno = errno;
 		return -1;
+	}
 
 	/* create the host thread to wait/handle the interrupt */
 	ret = pthread_create(&intr_thread, NULL,
 			eal_intr_thread_main, NULL);
 	if (ret != 0) {
+		rte_errno = ret;
 		RTE_LOG(ERR, EAL,
 			"Failed to create thread for interrupt handling\n");
 	} else {