sound: OSS: keep index within bounds of midi_devs[]

When the {orig,midi}_dev equals num_midis, that's one too
large already.

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 1 insertions, 1 deletions

diff --git a/sound/oss/mpu401.c b/sound/oss/mpu401.c
index 734b8f9e2f78..0af9d24feb8f 100644
--- a/sound/oss/mpu401.c
+++ b/sound/oss/mpu401.c
@@ -770,7 +770,7 @@ static int mpu_synth_ioctl(int dev, unsigned int cmd, void __user *arg)
 
         midi_dev = synth_devs[dev]->midi_dev;
 
-        if (midi_dev < 0 || midi_dev > num_midis || midi_devs[midi_dev] == NULL)
+        if (midi_dev < 0 || midi_dev >= num_midis || midi_devs[midi_dev] == NULL)
                 return -ENXIO;
 
         devc = &dev_conf[midi_dev];