6 files changed, 175 insertions, 66 deletions

diff --git a/sound/usb/usbaudio.c b/sound/usb/usbaudio.c
index 67202b9eeb77..4dfb91d4398a 100644
--- a/sound/usb/usbaudio.c
+++ b/sound/usb/usbaudio.c
@@ -186,6 +186,7 @@ struct snd_usb_substream {
         u64 formats;                    /* format bitmasks (all or'ed) */
         unsigned int num_formats;               /* number of supported audio formats (list) */
         struct list_head fmt_list;      /* format list */
+        struct snd_pcm_hw_constraint_list rate_list;    /* limited rates */
         spinlock_t lock;
 
         struct snd_urb_ops ops;         /* callbacks (must be filled at init) */
@@ -253,7 +254,7 @@ static int prepare_capture_sync_urb(struct snd_usb_substream *subs,
                                     struct urb *urb)
 {
         unsigned char *cp = urb->transfer_buffer;
-        struct snd_urb_ctx *ctx = (struct snd_urb_ctx *)urb->context;
+        struct snd_urb_ctx *ctx = urb->context;
 
         urb->dev = ctx->subs->dev; /* we need to set this at each time */
         urb->iso_frame_desc[0].length = 3;
@@ -275,7 +276,7 @@ static int prepare_capture_sync_urb_hs(struct snd_usb_substream *subs,
                                        struct urb *urb)
 {
         unsigned char *cp = urb->transfer_buffer;
-        struct snd_urb_ctx *ctx = (struct snd_urb_ctx *)urb->context;
+        struct snd_urb_ctx *ctx = urb->context;
 
         urb->dev = ctx->subs->dev; /* we need to set this at each time */
         urb->iso_frame_desc[0].length = 4;
@@ -313,7 +314,7 @@ static int prepare_capture_urb(struct snd_usb_substream *subs,
                                struct urb *urb)
 {
         int i, offs;
-        struct snd_urb_ctx *ctx = (struct snd_urb_ctx *)urb->context;
+        struct snd_urb_ctx *ctx = urb->context;
 
         offs = 0;
         urb->dev = ctx->subs->dev; /* we need to set this at each time */
@@ -391,6 +392,16 @@ static int retire_capture_urb(struct snd_usb_substream *subs,
         return 0;
 }
 
+/*
+ * Process after capture complete when paused.  Nothing to do.
+ */
+static int retire_paused_capture_urb(struct snd_usb_substream *subs,
+                                     struct snd_pcm_runtime *runtime,
+                                     struct urb *urb)
+{
+        return 0;
+}
+
 
 /*
  * prepare urb for full speed playback sync pipe
@@ -402,7 +413,7 @@ static int prepare_playback_sync_urb(struct snd_usb_substream *subs,
                                      struct snd_pcm_runtime *runtime,
                                      struct urb *urb)
 {
-        struct snd_urb_ctx *ctx = (struct snd_urb_ctx *)urb->context;
+        struct snd_urb_ctx *ctx = urb->context;
 
         urb->dev = ctx->subs->dev; /* we need to set this at each time */
         urb->iso_frame_desc[0].length = 3;
@@ -420,7 +431,7 @@ static int prepare_playback_sync_urb_hs(struct snd_usb_substream *subs,
                                         struct snd_pcm_runtime *runtime,
                                         struct urb *urb)
 {
-        struct snd_urb_ctx *ctx = (struct snd_urb_ctx *)urb->context;
+        struct snd_urb_ctx *ctx = urb->context;
 
         urb->dev = ctx->subs->dev; /* we need to set this at each time */
         urb->iso_frame_desc[0].length = 4;
@@ -493,13 +504,13 @@ static int snd_usb_audio_next_packet_size(struct snd_usb_substream *subs)
 }
 
 /*
- * Prepare urb for streaming before playback starts.
+ * Prepare urb for streaming before playback starts or when paused.
  *
- * We don't yet have data, so we send a frame of silence.
+ * We don't have any data, so we send a frame of silence.
  */
-static int prepare_startup_playback_urb(struct snd_usb_substream *subs,
-                                        struct snd_pcm_runtime *runtime,
-                                        struct urb *urb)
+static int prepare_nodata_playback_urb(struct snd_usb_substream *subs,
+                                       struct snd_pcm_runtime *runtime,
+                                       struct urb *urb)
 {
         unsigned int i, offs, counts;
         struct snd_urb_ctx *ctx = urb->context;
@@ -537,7 +548,7 @@ static int prepare_playback_urb(struct snd_usb_substream *subs,
         unsigned int counts;
         unsigned long flags;
         int period_elapsed = 0;
-        struct snd_urb_ctx *ctx = (struct snd_urb_ctx *)urb->context;
+        struct snd_urb_ctx *ctx = urb->context;
 
         stride = runtime->frame_bits >> 3;
 
@@ -622,7 +633,7 @@ static int retire_playback_urb(struct snd_usb_substream *subs,
  */
 static struct snd_urb_ops audio_urb_ops[2] = {
         {
-                .prepare =      prepare_startup_playback_urb,
+                .prepare =      prepare_nodata_playback_urb,
                 .retire =       retire_playback_urb,
                 .prepare_sync = prepare_playback_sync_urb,
                 .retire_sync =  retire_playback_sync_urb,
@@ -637,7 +648,7 @@ static struct snd_urb_ops audio_urb_ops[2] = {
 
 static struct snd_urb_ops audio_urb_ops_high_speed[2] = {
         {
-                .prepare =      prepare_startup_playback_urb,
+                .prepare =      prepare_nodata_playback_urb,
                 .retire =       retire_playback_urb,
                 .prepare_sync = prepare_playback_sync_urb_hs,
                 .retire_sync =  retire_playback_sync_urb_hs,
@@ -655,7 +666,7 @@ static struct snd_urb_ops audio_urb_ops_high_speed[2] = {
  */
 static void snd_complete_urb(struct urb *urb)
 {
-        struct snd_urb_ctx *ctx = (struct snd_urb_ctx *)urb->context;
+        struct snd_urb_ctx *ctx = urb->context;
         struct snd_usb_substream *subs = ctx->subs;
         struct snd_pcm_substream *substream = ctx->subs->pcm_substream;
         int err = 0;
@@ -678,7 +689,7 @@ static void snd_complete_urb(struct urb *urb)
  */
 static void snd_complete_sync_urb(struct urb *urb)
 {
-        struct snd_urb_ctx *ctx = (struct snd_urb_ctx *)urb->context;
+        struct snd_urb_ctx *ctx = urb->context;
         struct snd_usb_substream *subs = ctx->subs;
         struct snd_pcm_substream *substream = ctx->subs->pcm_substream;
         int err = 0;
@@ -925,10 +936,14 @@ static int snd_usb_pcm_playback_trigger(struct snd_pcm_substream *substream,
 
         switch (cmd) {
         case SNDRV_PCM_TRIGGER_START:
+        case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
                 subs->ops.prepare = prepare_playback_urb;
                 return 0;
         case SNDRV_PCM_TRIGGER_STOP:
                 return deactivate_urbs(subs, 0, 0);
+        case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+                subs->ops.prepare = prepare_nodata_playback_urb;
+                return 0;
         default:
                 return -EINVAL;
         }
@@ -944,9 +959,16 @@ static int snd_usb_pcm_capture_trigger(struct snd_pcm_substream *substream,
 
         switch (cmd) {
         case SNDRV_PCM_TRIGGER_START:
+                subs->ops.retire = retire_capture_urb;
                 return start_urbs(subs, substream->runtime);
         case SNDRV_PCM_TRIGGER_STOP:
                 return deactivate_urbs(subs, 0, 0);
+        case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+                subs->ops.retire = retire_paused_capture_urb;
+                return 0;
+        case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+                subs->ops.retire = retire_capture_urb;
+                return 0;
         default:
                 return -EINVAL;
         }
@@ -1408,7 +1430,7 @@ static int set_format(struct snd_usb_substream *subs, struct audioformat *fmt)
 static int snd_usb_hw_params(struct snd_pcm_substream *substream,
                              struct snd_pcm_hw_params *hw_params)
 {
-        struct snd_usb_substream *subs = (struct snd_usb_substream *)substream->runtime->private_data;
+        struct snd_usb_substream *subs = substream->runtime->private_data;
         struct audioformat *fmt;
         unsigned int channels, rate, format;
         int ret, changed;
@@ -1464,7 +1486,7 @@ static int snd_usb_hw_params(struct snd_pcm_substream *substream,
  */
 static int snd_usb_hw_free(struct snd_pcm_substream *substream)
 {
-        struct snd_usb_substream *subs = (struct snd_usb_substream *)substream->runtime->private_data;
+        struct snd_usb_substream *subs = substream->runtime->private_data;
 
         subs->cur_audiofmt = NULL;
         subs->cur_rate = 0;
@@ -1505,33 +1527,20 @@ static int snd_usb_pcm_prepare(struct snd_pcm_substream *substream)
         /* for playback, submit the URBs now; otherwise, the first hwptr_done
          * updates for all URBs would happen at the same time when starting */
         if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK) {
-                subs->ops.prepare = prepare_startup_playback_urb;
+                subs->ops.prepare = prepare_nodata_playback_urb;
                 return start_urbs(subs, runtime);
         } else
                 return 0;
 }
 
-static struct snd_pcm_hardware snd_usb_playback =
+static struct snd_pcm_hardware snd_usb_hardware =
 {
         .info =                 SNDRV_PCM_INFO_MMAP |
                                 SNDRV_PCM_INFO_MMAP_VALID |
                                 SNDRV_PCM_INFO_BATCH |
                                 SNDRV_PCM_INFO_INTERLEAVED |
-                                SNDRV_PCM_INFO_BLOCK_TRANSFER,
-        .buffer_bytes_max =     1024 * 1024,
-        .period_bytes_min =     64,
-        .period_bytes_max =     512 * 1024,
-        .periods_min =          2,
-        .periods_max =          1024,
-};
-
-static struct snd_pcm_hardware snd_usb_capture =
-{
-        .info =                 SNDRV_PCM_INFO_MMAP |
-                                SNDRV_PCM_INFO_MMAP_VALID |
-                                SNDRV_PCM_INFO_BATCH |
-                                SNDRV_PCM_INFO_INTERLEAVED |
-                                SNDRV_PCM_INFO_BLOCK_TRANSFER,
+                                SNDRV_PCM_INFO_BLOCK_TRANSFER |
+                                SNDRV_PCM_INFO_PAUSE,
         .buffer_bytes_max =     1024 * 1024,
         .period_bytes_min =     64,
         .period_bytes_max =     512 * 1024,
@@ -1810,28 +1819,33 @@ static int check_hw_params_convention(struct snd_usb_substream *subs)
 static int snd_usb_pcm_check_knot(struct snd_pcm_runtime *runtime,
                                   struct snd_usb_substream *subs)
 {
-        struct list_head *p;
-        struct snd_pcm_hw_constraint_list constraints_rates;
+        struct audioformat *fp;
+        int count = 0, needs_knot = 0;
         int err;
 
-        list_for_each(p, &subs->fmt_list) {
-                struct audioformat *fp;
-                fp = list_entry(p, struct audioformat, list);
-
-                if (!fp->needs_knot)
-                        continue;
-
-                constraints_rates.count = fp->nr_rates;
-                constraints_rates.list = fp->rate_table;
-                constraints_rates.mask = 0;
-
-                err = snd_pcm_hw_constraint_list(runtime, 0,
-                        SNDRV_PCM_HW_PARAM_RATE,
-                        &constraints_rates);
-
-                if (err < 0)
-                        return err;
+        list_for_each_entry(fp, &subs->fmt_list, list) {
+                if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS)
+                        return 0;
+                count += fp->nr_rates;
+                if (fp->needs_knot)
+                        needs_knot = 1;
         }
+        if (!needs_knot)
+                return 0;
+
+        subs->rate_list.count = count;
+        subs->rate_list.list = kmalloc(sizeof(int) * count, GFP_KERNEL);
+        subs->rate_list.mask = 0;
+        count = 0;
+        list_for_each_entry(fp, &subs->fmt_list, list) {
+                int i;
+                for (i = 0; i < fp->nr_rates; i++)
+                        subs->rate_list.list[count++] = fp->rate_table[i];
+        }
+        err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
+                                         &subs->rate_list);
+        if (err < 0)
+                return err;
 
         return 0;
 }
@@ -1904,8 +1918,7 @@ static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substre
         return 0;
 }
 
-static int snd_usb_pcm_open(struct snd_pcm_substream *substream, int direction,
-                            struct snd_pcm_hardware *hw)
+static int snd_usb_pcm_open(struct snd_pcm_substream *substream, int direction)
 {
         struct snd_usb_stream *as = snd_pcm_substream_chip(substream);
         struct snd_pcm_runtime *runtime = substream->runtime;
@@ -1913,7 +1926,7 @@ static int snd_usb_pcm_open(struct snd_pcm_substream *substream, int direction,
 
         subs->interface = -1;
         subs->format = 0;
-        runtime->hw = *hw;
+        runtime->hw = snd_usb_hardware;
         runtime->private_data = subs;
         subs->pcm_substream = substream;
         return setup_hw_info(runtime, subs);
@@ -1934,7 +1947,7 @@ static int snd_usb_pcm_close(struct snd_pcm_substream *substream, int direction)
 
 static int snd_usb_playback_open(struct snd_pcm_substream *substream)
 {
-        return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_PLAYBACK, &snd_usb_playback);
+        return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_PLAYBACK);
 }
 
 static int snd_usb_playback_close(struct snd_pcm_substream *substream)
@@ -1944,7 +1957,7 @@ static int snd_usb_playback_close(struct snd_pcm_substream *substream)
 
 static int snd_usb_capture_open(struct snd_pcm_substream *substream)
 {
-        return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_CAPTURE, &snd_usb_capture);
+        return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_CAPTURE);
 }
 
 static int snd_usb_capture_close(struct snd_pcm_substream *substream)
@@ -2231,6 +2244,7 @@ static void free_substream(struct snd_usb_substream *subs)
                 kfree(fp->rate_table);
                 kfree(fp);
         }
+        kfree(subs->rate_list.list);
 }
 
 
@@ -2456,6 +2470,7 @@ static int parse_audio_format_rates(struct snd_usb_audio *chip, struct audioform
                  * build the rate table and bitmap flags
                  */
                 int r, idx, c;
+                unsigned int nonzero_rates = 0;
                 /* this table corresponds to the SNDRV_PCM_RATE_XXX bit */
                 static unsigned int conv_rates[] = {
                         5512, 8000, 11025, 16000, 22050, 32000, 44100, 48000,
@@ -2471,7 +2486,14 @@ static int parse_audio_format_rates(struct snd_usb_audio *chip, struct audioform
                 fp->nr_rates = nr_rates;
                 fp->rate_min = fp->rate_max = combine_triple(&fmt[8]);
                 for (r = 0, idx = offset + 1; r < nr_rates; r++, idx += 3) {
-                        unsigned int rate = fp->rate_table[r] = combine_triple(&fmt[idx]);
+                        unsigned int rate = combine_triple(&fmt[idx]);
+                        /* C-Media CM6501 mislabels its 96 kHz altsetting */
+                        if (rate == 48000 && nr_rates == 1 &&
+                            chip->usb_id == USB_ID(0x0d8c, 0x0201) &&
+                            fp->altsetting == 5 && fp->maxpacksize == 392)
+                                rate = 96000;
+                        fp->rate_table[r] = rate;
+                        nonzero_rates |= rate;
                         if (rate < fp->rate_min)
                                 fp->rate_min = rate;
                         else if (rate > fp->rate_max)
@@ -2487,6 +2509,10 @@ static int parse_audio_format_rates(struct snd_usb_audio *chip, struct audioform
                         if (!found)
                                 fp->needs_knot = 1;
                 }
+                if (!nonzero_rates) {
+                        hwc_debug("All rates were zero. Skipping format!\n");
+                        return -1;
+                }
                 if (fp->needs_knot)
                         fp->rates |= SNDRV_PCM_RATE_KNOT;
         } else {
@@ -3051,6 +3077,58 @@ static int create_ua1000_quirk(struct snd_usb_audio *chip,
         return 0;
 }
 
+/*
+ * Create a stream for an Edirol UA-101 interface.
+ * Copy, paste and modify from Edirol UA-1000
+ */
+static int create_ua101_quirk(struct snd_usb_audio *chip,
+                               struct usb_interface *iface,
+                               const struct snd_usb_audio_quirk *quirk)
+{
+        static const struct audioformat ua101_format = {
+                .format = SNDRV_PCM_FORMAT_S32_LE,
+                .fmt_type = USB_FORMAT_TYPE_I,
+                .altsetting = 1,
+                .altset_idx = 1,
+                .attributes = 0,
+                .rates = SNDRV_PCM_RATE_CONTINUOUS,
+        };
+        struct usb_host_interface *alts;
+        struct usb_interface_descriptor *altsd;
+        struct audioformat *fp;
+        int stream, err;
+
+        if (iface->num_altsetting != 2)
+                return -ENXIO;
+        alts = &iface->altsetting[1];
+        altsd = get_iface_desc(alts);
+        if (alts->extralen != 18 || alts->extra[1] != USB_DT_CS_INTERFACE ||
+            altsd->bNumEndpoints != 1)
+                return -ENXIO;
+
+        fp = kmemdup(&ua101_format, sizeof(*fp), GFP_KERNEL);
+        if (!fp)
+                return -ENOMEM;
+
+        fp->channels = alts->extra[11];
+        fp->iface = altsd->bInterfaceNumber;
+        fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
+        fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
+        fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
+        fp->rate_max = fp->rate_min = combine_triple(&alts->extra[15]);
+
+        stream = (fp->endpoint & USB_DIR_IN)
+                ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
+        err = add_audio_endpoint(chip, stream, fp);
+        if (err < 0) {
+                kfree(fp);
+                return err;
+        }
+        /* FIXME: playback must be synchronized to capture */
+        usb_set_interface(chip->dev, fp->iface, 0);
+        return 0;
+}
+
 static int snd_usb_create_quirk(struct snd_usb_audio *chip,
                                 struct usb_interface *iface,
                                 const struct snd_usb_audio_quirk *quirk);
@@ -3232,6 +3310,7 @@ static int snd_usb_create_quirk(struct snd_usb_audio *chip,
                 [QUIRK_AUDIO_FIXED_ENDPOINT] = create_fixed_stream_quirk,
                 [QUIRK_AUDIO_EDIROL_UA700_UA25] = create_ua700_ua25_quirk,
                 [QUIRK_AUDIO_EDIROL_UA1000] = create_ua1000_quirk,
+                [QUIRK_AUDIO_EDIROL_UA101] = create_ua101_quirk,
         };
 
         if (quirk->type < QUIRK_TYPE_COUNT) {
@@ -3280,6 +3359,7 @@ static void snd_usb_audio_create_proc(struct snd_usb_audio *chip)
 
 static int snd_usb_audio_free(struct snd_usb_audio *chip)
 {
+        usb_chip[chip->index] = NULL;
         kfree(chip);
         return 0;
 }
@@ -3541,7 +3621,6 @@ static void snd_usb_audio_disconnect(struct usb_device *dev, void *ptr)
                 list_for_each(p, &chip->mixer_list) {
                         snd_usb_mixer_disconnect(p);
                 }
-                usb_chip[chip->index] = NULL;
                 mutex_unlock(&register_mutex);
                 snd_card_free_when_closed(card);
         } else {
@@ -3577,8 +3656,7 @@ static int __init snd_usb_audio_init(void)
                 printk(KERN_WARNING "invalid nrpacks value.\n");
                 return -EINVAL;
         }
-        usb_register(&usb_audio_driver);
-        return 0;
+        return usb_register(&usb_audio_driver);
 }
 
 
diff --git a/sound/usb/usbaudio.h b/sound/usb/usbaudio.h
index 0f4b2b8541d6..2272f45a1867 100644
--- a/sound/usb/usbaudio.h
+++ b/sound/usb/usbaudio.h
@@ -159,6 +159,7 @@ enum quirk_type {
         QUIRK_AUDIO_FIXED_ENDPOINT,
         QUIRK_AUDIO_EDIROL_UA700_UA25,
         QUIRK_AUDIO_EDIROL_UA1000,
+        QUIRK_AUDIO_EDIROL_UA101,
 
         QUIRK_TYPE_COUNT
 };
diff --git a/sound/usb/usbmixer.c b/sound/usb/usbmixer.c
index e74eb1bc8d87..7b3bf3545a3b 100644
--- a/sound/usb/usbmixer.c
+++ b/sound/usb/usbmixer.c
@@ -1526,7 +1526,7 @@ static int parse_audio_selector_unit(struct mixer_build *state, int unitid, unsi
                 namelist[i] = kmalloc(MAX_ITEM_NAME_LEN, GFP_KERNEL);
                 if (! namelist[i]) {
                         snd_printk(KERN_ERR "cannot malloc\n");
-                        while (--i > 0)
+                        while (i--)
                                 kfree(namelist[i]);
                         kfree(namelist);
                         kfree(cval);
diff --git a/sound/usb/usbquirks.h b/sound/usb/usbquirks.h
index a7e9563a01df..25b4ab4f61e7 100644
--- a/sound/usb/usbquirks.h
+++ b/sound/usb/usbquirks.h
@@ -1098,7 +1098,37 @@ YAMAHA_DEVICE(0x7010, "UB99"),
                 }
         }
 },
-        /* TODO: add Edirol UA-101 support */
+/* Roland UA-101 in High-Speed Mode only */
+{
+        USB_DEVICE(0x0582, 0x007d),
+        .driver_info = (unsigned long) & (const struct snd_usb_audio_quirk) {
+                .vendor_name = "Roland",
+                .product_name = "UA-101",
+                .ifnum = QUIRK_ANY_INTERFACE,
+                .type = QUIRK_COMPOSITE,
+                .data = (const struct snd_usb_audio_quirk[]) {
+                        {
+                                .ifnum = 0,
+                                .type = QUIRK_AUDIO_EDIROL_UA101
+                        },
+                        {
+                                .ifnum = 1,
+                                .type = QUIRK_AUDIO_EDIROL_UA101
+                        },
+                        {
+                                .ifnum = 2,
+                                .type = QUIRK_MIDI_FIXED_ENDPOINT,
+                                .data = & (const struct snd_usb_midi_endpoint_info) {
+                                        .out_cables = 0x0001,
+                                        .in_cables  = 0x0001
+                                }
+                        },
+                        {
+                                .ifnum = -1
+                        }
+                }
+        }
+},
 {
         /* has ID 0x0081 when not in "Advanced Driver" mode */
         USB_DEVICE(0x0582, 0x0080),
diff --git a/sound/usb/usx2y/usbusx2yaudio.c b/sound/usb/usx2y/usbusx2yaudio.c
index 367f8a32a665..0a352e46862f 100644
--- a/sound/usb/usx2y/usbusx2yaudio.c
+++ b/sound/usb/usx2y/usbusx2yaudio.c
@@ -322,7 +322,7 @@ static void i_usX2Y_urb_complete(struct urb *urb)
                 usX2Y_error_urb_status(usX2Y, subs, urb);
                 return;
         }
-        if (likely(urb->start_frame == usX2Y->wait_iso_frame))
+        if (likely((urb->start_frame & 0xFFFF) == (usX2Y->wait_iso_frame & 0xFFFF)))
                 subs->completed_urb = urb;
         else {
                 usX2Y_error_sequence(usX2Y, subs, urb);
diff --git a/sound/usb/usx2y/usx2yhwdeppcm.c b/sound/usb/usx2y/usx2yhwdeppcm.c
index 8f3e35e24e72..a5e7bcd7ca2e 100644
--- a/sound/usb/usx2y/usx2yhwdeppcm.c
+++ b/sound/usb/usx2y/usx2yhwdeppcm.c
@@ -243,7 +243,7 @@ static void i_usX2Y_usbpcm_urb_complete(struct urb *urb)
                 usX2Y_error_urb_status(usX2Y, subs, urb);
                 return;
         }
-        if (likely(urb->start_frame == usX2Y->wait_iso_frame))
+        if (likely((urb->start_frame & 0xFFFF) == (usX2Y->wait_iso_frame & 0xFFFF)))
                 subs->completed_urb = urb;
         else {
                 usX2Y_error_sequence(usX2Y, subs, urb);