From 6490dbe4fe9d0bd457d035dcbc1fa755974faa1e Mon Sep 17 00:00:00 2001
From: Roman Penyaev <rpenyaev@suse.de>
Date: Wed, 18 Nov 2020 12:05:20 +0100
Subject: [PATCH] thread: don't output error in case of EAGAIN for interrupt
 mode

Keep silence if nothing to read from message queue.

Signed-off-by: Roman Penyaev <rpenyaev@suse.de>
Change-Id: I6f3df6a58e708aa424fe2c6ebca509c44062d12c
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/5153
Community-CI: Mellanox Build Bot
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Aleksey Marchuk <alexeymar@mellanox.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
---
 lib/thread/thread.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/thread/thread.c b/lib/thread/thread.c
index b523b130d..ed00407d5 100644
--- a/lib/thread/thread.c
+++ b/lib/thread/thread.c
@@ -523,7 +523,7 @@ msg_queue_run_batch(struct spdk_thread *thread, uint32_t max_msgs)
 		 * This can avoid msg notification missing.
 		 */
 		rc = read(thread->msg_fd, &notify, sizeof(notify));
-		if (rc < 0) {
+		if (rc < 0 && errno != EAGAIN) {
 			SPDK_ERRLOG("failed to acknowledge msg_queue: %s.\n", spdk_strerror(errno));
 		}
 	}