From c485f7e9863c4483f5d2e9a8da622b52d110d866 Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Thu, 17 Jun 2021 15:47:42 +0200 Subject: ALSA: seq: oss: Fix error check at system port creation The system port creation in ALSA OSS sequencer was wrongly checked against to the port number that can be never negative. The error code should be checked rather against the ioctl call. This patch corrects the error check. Reported-by: Dan Carpenter Link: https://lore.kernel.org/r/20210617134742.6321-1-tiwai@suse.de Signed-off-by: Takashi Iwai --- sound/core/seq/oss/seq_oss_init.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) (limited to 'sound/core') diff --git a/sound/core/seq/oss/seq_oss_init.c b/sound/core/seq/oss/seq_oss_init.c index a53d81a86af2..0ee4a5081fd6 100644 --- a/sound/core/seq/oss/seq_oss_init.c +++ b/sound/core/seq/oss/seq_oss_init.c @@ -94,11 +94,10 @@ snd_seq_oss_create_client(void) port_callback.event_input = receive_announce; port->kernel = &port_callback; - call_ctl(SNDRV_SEQ_IOCTL_CREATE_PORT, port); - system_port = port->addr.port; - if (system_port >= 0) { + if (call_ctl(SNDRV_SEQ_IOCTL_CREATE_PORT, port) >= 0) { struct snd_seq_port_subscribe subs; + system_port = port->addr.port; memset(&subs, 0, sizeof(subs)); subs.sender.client = SNDRV_SEQ_CLIENT_SYSTEM; subs.sender.port = SNDRV_SEQ_PORT_SYSTEM_ANNOUNCE; -- cgit v1.2.3