ALSA: rawmidi: fix the get next midi device ioctl

[net-next-2.6.git] / sound / core / rawmidi.c

diff --git a/sound/core/rawmidi.c b/sound/core/rawmidi.c
index eb68326c37d47626b53d7970fe6e88027edc0e13..a7868ad4d530fd40b3a9bd608bd7860a7d35ce44 100644 (file)
--- a/sound/core/rawmidi.c
+++ b/sound/core/rawmidi.c
@@ -829,6 +829,8 @@ static int snd_rawmidi_control_ioctl(struct snd_card *card,
                
                if (get_user(device, (int __user *)argp))
                        return -EFAULT;
+               if (device >= SNDRV_RAWMIDI_DEVICES) /* next device is -1 */
+                       device = SNDRV_RAWMIDI_DEVICES - 1;
                mutex_lock(&register_mutex);
                device = device < 0 ? 0 : device + 1;
                while (device < SNDRV_RAWMIDI_DEVICES) {