[RFC BlueZ] android/AVDTP: Make signalling channel high priority

[Luiz Augusto von Dentz <luiz.dentz@gmail.com>]

From: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>

This makes signalling high priority (6) so it can push commands before
the stream channel, without this the stream channel may be schedule
first and cause the signalling commands to timeout while waiting a slot.
---
 android/avdtp.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/android/avdtp.c b/android/avdtp.c
index 4abcd75..4cfffc8 100644
--- a/android/avdtp.c
+++ b/android/avdtp.c
@@ -2057,6 +2057,7 @@ struct avdtp *avdtp_new(int fd, size_t imtu, size_t omtu, uint16_t version)
 	struct avdtp *session;
 	GIOCondition cond = G_IO_IN | G_IO_ERR | G_IO_HUP | G_IO_NVAL;
 	int new_fd;
+	int priority;
 
 	new_fd = dup(fd);
 	if (new_fd < 0) {
@@ -2064,6 +2065,14 @@ struct avdtp *avdtp_new(int fd, size_t imtu, size_t omtu, uint16_t version)
 		return NULL;
 	}
 
+	priority = 6;
+	if (setsockopt(new_fd, SOL_SOCKET, SO_PRIORITY,
+			(const void *) &priority, sizeof(priority)) < 0) {
+		error("setsockopt(SO_PRIORITY): %s (%d)", strerror(errno),
+									errno);
+		return NULL;
+	}
+
 	session = g_new0(struct avdtp, 1);
 	session->io = g_io_channel_unix_new(new_fd);
 	session->version = version;
-- 
1.8.4.2