[ALSA] usb-audio: allow low speed MIDI devices
Allow low speed MIDI devices because newer devices from ESI do not
support full speed.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
diff --git a/sound/usb/usbaudio.c b/sound/usb/usbaudio.c
index cbe8b33..e1558a6 100644
--- a/sound/usb/usbaudio.c
+++ b/sound/usb/usbaudio.c
@@ -2840,6 +2840,10 @@
/* skip non-supported classes */
continue;
}
+ if (snd_usb_get_speed(dev) == USB_SPEED_LOW) {
+ snd_printk(KERN_ERR "low speed audio streaming not supported\n");
+ continue;
+ }
if (! parse_audio_endpoints(chip, j)) {
usb_set_interface(dev, j, 0); /* reset the current interface */
usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
@@ -3382,7 +3386,8 @@
*rchip = NULL;
- if (snd_usb_get_speed(dev) != USB_SPEED_FULL &&
+ if (snd_usb_get_speed(dev) != USB_SPEED_LOW &&
+ snd_usb_get_speed(dev) != USB_SPEED_FULL &&
snd_usb_get_speed(dev) != USB_SPEED_HIGH) {
snd_printk(KERN_ERR "unknown device speed %d\n", snd_usb_get_speed(dev));
return -ENXIO;
@@ -3456,7 +3461,9 @@
usb_make_path(dev, card->longname + len, sizeof(card->longname) - len);
strlcat(card->longname,
- snd_usb_get_speed(dev) == USB_SPEED_FULL ? ", full speed" : ", high speed",
+ snd_usb_get_speed(dev) == USB_SPEED_LOW ? ", low speed" :
+ snd_usb_get_speed(dev) == USB_SPEED_FULL ? ", full speed" :
+ ", high speed",
sizeof(card->longname));
snd_usb_audio_create_proc(chip);