[PATCH - aconnect 1/1] Fix aconnect printing card and pid on older kernels

From: Adam Goode <agoode@google.com>
To: patch@alsa-project.org
Cc: Adam Goode <agoode@google.com>,
	alsa-devel@alsa-project.org, martin.koegler@chello.at
Subject: [PATCH - aconnect 1/1] Fix aconnect printing card and pid on older kernels
Date: Fri,  1 Apr 2016 13:35:01 -0400	[thread overview]
Message-ID: <1459532101-6582-1-git-send-email-agoode@google.com> (raw)

alsa-lib is changed to return a distinct negative value if running on
an older kernel. -1 is only returned now if the kernel knows for sure
that there is no card or pid. On older kernels, alsa-lib will return
-ENOSYS.

Signed-off-by: Adam Goode <agoode@google.com>

diff --git a/seq/aconnect/aconnect.c b/seq/aconnect/aconnect.c
index 85a7770..bbc5bb3 100644
--- a/seq/aconnect/aconnect.c
+++ b/seq/aconnect/aconnect.c
@@ -177,13 +177,13 @@ static void print_port(snd_seq_t *seq, snd_seq_client_info_t *cinfo,
 #ifdef HAVE_SEQ_CLIENT_INFO_GET_CARD
 		card = snd_seq_client_info_get_card(cinfo);
 #endif
-		if (card != -1)
+		if (card >= 0)
 			printf(",card=%d", card);
 
 #ifdef HAVE_SEQ_CLIENT_INFO_GET_PID
 		pid = snd_seq_client_info_get_pid(cinfo);
 #endif
-		if (pid != -1)
+		if (pid >= 0)
 			printf(",pid=%d", pid);
 		printf("]\n");
 	}
-- 
2.8.0.rc3.226.g39d4020
