ALSA: usb-audio: remove Wireless USB dead code

Wireless USB host controller support has been removed
from Linux Kernel more than 3 years ago in commit
caa6772db4c1 ("Staging: remove wusbcore and UWB from the
kernel tree."), and the associated code in the
snd-usb-audio driver became unused and untested.

If in the future somebody will return WUSB/UWB support
back to the kernel, the snd-usb-audio driver will reject
Wireless USB audio devices at probe stage, and this patch
should be reverted.

Signed-off-by: Ruslan Bilovol <ruslan.bilovol@gmail.com>
Link: https://lore.kernel.org/r/20230312222857.296623-1-ruslan.bilovol@gmail.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/usb/card.c b/sound/usb/card.c
index 26268ff..f6e99ce 100644 (file)
--- a/sound/usb/card.c
+++ b/sound/usb/card.c
@@ -609,7 +609,6 @@ static int snd_usb_audio_create(struct usb_interface *intf,
        case USB_SPEED_LOW:
        case USB_SPEED_FULL:
        case USB_SPEED_HIGH:
-       case USB_SPEED_WIRELESS:
        case USB_SPEED_SUPER:
        case USB_SPEED_SUPER_PLUS:
                break;

diff --git a/sound/usb/endpoint.c b/sound/usb/endpoint.c
index 419302e..1e0af11 100644 (file)
--- a/sound/usb/endpoint.c
+++ b/sound/usb/endpoint.c
@@ -1173,22 +1173,8 @@ static int data_ep_set_params(struct snd_usb_endpoint *ep)
         */
        if (usb_pipein(ep->pipe) || ep->implicit_fb_sync) {
 
-               urb_packs = packs_per_ms;
-               /*
-                * Wireless devices can poll at a max rate of once per 4ms.
-                * For dataintervals less than 5, increase the packet count to
-                * allow the host controller to use bursting to fill in the
-                * gaps.
-                */
-               if (snd_usb_get_speed(chip->dev) == USB_SPEED_WIRELESS) {
-                       int interval = ep->datainterval;
-                       while (interval < 5) {
-                               urb_packs <<= 1;
-                               ++interval;
-                       }
-               }
                /* make capture URBs <= 1 ms and smaller than a period */
-               urb_packs = min(max_packs_per_urb, urb_packs);
+               urb_packs = min(max_packs_per_urb, packs_per_ms);
                while (urb_packs > 1 && urb_packs * maxsize >= ep->cur_period_bytes)
                        urb_packs >>= 1;
                ep->nurbs = MAX_URBS;

diff --git a/sound/usb/helper.c b/sound/usb/helper.c
index a441026..bf80e55 100644 (file)
--- a/sound/usb/helper.c
+++ b/sound/usb/helper.c
@@ -108,7 +108,6 @@ unsigned char snd_usb_parse_datainterval(struct snd_usb_audio *chip,
 {
        switch (snd_usb_get_speed(chip->dev)) {
        case USB_SPEED_HIGH:
-       case USB_SPEED_WIRELESS:
        case USB_SPEED_SUPER:
        case USB_SPEED_SUPER_PLUS:
                if (get_endpoint(alts, 0)->bInterval >= 1 &&