kernel/linux.git/sound/usb, branch v7.1-rc5

ALSA: scarlett2: Allow flash writes ending at segment boundary

2026-05-20T05:51:46+00:00

scarlett2_hwdep_write() rejects writes when offset + count is greater than or equal to the selected flash segment size. That incorrectly treats a write ending exactly at the end of the segment as out of space, although the last byte written is still within the segment. Split invalid argument checks from the segment-space check, keep zero-length writes as no-ops, and compare count against the remaining segment size. This permits exact-end writes and avoids relying on offset + count before deciding whether the request is in bounds. Fixes: 1abfbd3c9527 ("ALSA: scarlett2: Add support for uploading new firmware") Cc: stable@vger.kernel.org Signed-off-by: Cássio Gabriel Link: https://patch.msgid.link/20260519-alsa-scarlett2-flash-write-boundary-v1-1-b550480e92da@gmail.com Signed-off-by: Takashi Iwai

ALSA: ua101: Reject too-short USB descriptors

2026-05-19T06:08:41+00:00

find_format_descriptor() walks the class-specific interface extras by advancing with bLength. It rejects descriptors that extend past the remaining buffer, but it does not reject descriptor lengths smaller than a USB descriptor header. Reject too-short descriptors before using bLength to advance the local scan. This keeps the UA-101 parser robust against malformed descriptor data and matches the usual USB descriptor walking rules. Fixes: 63978ab3e3e9 ("sound: add Edirol UA-101 support") Cc: stable@vger.kernel.org Signed-off-by: Cássio Gabriel Link: https://patch.msgid.link/20260519-alsa-ua101-desc-len-v1-1-4307d1a5e054@gmail.com Signed-off-by: Takashi Iwai

ALSA: usb-audio: qcom: Check offload mapping failures

2026-05-15T06:51:46+00:00

uaudio_transfer_buffer_setup() calls dma_get_sgtable() and then passes the sg_table to uaudio_iommu_map_xfer_buf() without checking whether sg table construction succeeded. If dma_get_sgtable() fails, the sg_table contents are not valid. uaudio_iommu_map_pa() also ignores iommu_map() failures for the event and transfer rings and still returns the allocated IOVA to the QMI response. That can expose an unmapped IOVA to the audio DSP. For transfer rings, the failed mapping also leaves the IOVA allocator state marked in use. Check both operations. Free the coherent transfer buffer when sg table construction fails, free the sg table when transfer-buffer IOMMU mapping fails, and release the transfer-ring IOVA if iommu_map() fails. Also return the existing event-ring IOVA when the event ring is already mapped, matching the pre-split helper behavior. Fixes: 326bbc348298 ("ALSA: usb-audio: qcom: Introduce QC USB SND offloading support") Fixes: 44499ecb4f28 ("ALSA: usb: qcom: Fix false-positive address space check") Cc: stable@vger.kernel.org Signed-off-by: Cássio Gabriel Link: https://patch.msgid.link/20260511-alsa-usb-qcom-offload-map-errors-v1-1-6502695e58bc@gmail.com Signed-off-by: Takashi Iwai

ALSA: usb-audio: Add iface reset and delay quirk for TTGK Technology USB-C Audio

2026-05-15T06:34:37+00:00

Setting up the interface when suspended/resumeing fail on this card. Adding a reset and delay quirk will eliminate this problem. usb 1-1: new full-speed USB device number 2 using xhci-hcd usb 1-1: New USB device found, idVendor=3302, idProduct=17c2 usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 usb 1-1: Product: USB-C Audio usb 1-1: Manufacturer: TTGK Technology usb 1-1: SerialNumber: 170120210706 Signed-off-by: Lianqin Hu Signed-off-by: Takashi Iwai Link: https://patch.msgid.link/TYUPR06MB621720E4E8F99A42E162FD51D23D2@TYUPR06MB6217.apcprd06.prod.outlook.com

ALSA: scarlett2: Add missing error check when initialise Autogain Status

2026-05-15T06:33:12+00:00

When initialise new control with scarlett2_add_new_ctl() function for Autogain Status, scarlett2_add_new_ctl() might throw an error. So, add error check after initialise new control for Autogain Status. This is reported by Coverity Scan with CID 1598781 as UNUSED_VALUE. Fixes: 0a995e38dc44 ("ALSA: scarlett2: Add support for software-controllable input gain") Signed-off-by: Robertus Diawan Chris Link: https://patch.msgid.link/20260508033914.111596-1-robertusdchris@gmail.com Signed-off-by: Takashi Iwai

ALSA: usb-audio: Bound MIDI 2.0 endpoint descriptor scans

2026-05-07T10:58:16+00:00

The USB MIDI 2.0 endpoint parser has the same descriptor walking pattern as the legacy MIDI parser. It validates bLength against bNumGrpTrmBlock before reading baAssoGrpTrmBlkID[], but not against the remaining bytes in the endpoint-extra scan. A malformed device can therefore make later baAssoGrpTrmBlkID[] reads consume bytes past the walked descriptor. Reject zero-length and overlong descriptors while walking endpoint extras. Fixes: ff49d1df79ae ("ALSA: usb-audio: USB MIDI 2.0 UMP support") Cc: stable@vger.kernel.org Signed-off-by: Cássio Gabriel Link: https://patch.msgid.link/20260507-usb-midi-endpoint-scan-bounds-v1-2-329d7348160e@gmail.com Signed-off-by: Takashi Iwai

ALSA: usb-audio: Bound MIDI endpoint descriptor scans

2026-05-07T10:58:09+00:00

snd_usbmidi_get_ms_info() validates the internal MIDIStreaming endpoint descriptor size before using baAssocJackID[], but the descriptor walker can still return a class-specific endpoint descriptor whose bLength exceeds the remaining bytes in the endpoint-extra scan. That leaves later flexible-array reads bounded by bLength, but not by the remaining bytes in the endpoint-extra scan. Stop walking when bLength is zero or extends past the remaining endpoint-extra scan. Fixes: 5c6cd7021a05 ("ALSA: usb-audio: Fix case when USB MIDI interface has more than one extra endpoint descriptor") Cc: stable@vger.kernel.org Signed-off-by: Cássio Gabriel Link: https://patch.msgid.link/20260507-usb-midi-endpoint-scan-bounds-v1-1-329d7348160e@gmail.com Signed-off-by: Takashi Iwai

ALSA: usb-audio: add clock quirk for Motu 1248

2026-05-04T15:50:02+00:00

The Motu 1248 (and probably other older Motu AVB interfaces) take more than 2 seconds to switch clock. During the clock switching process the device return that the clock is not valid. This is similar to what already implemented for the Microbook II interface. Add the Motu 1248 usb id to the existing Motu quirk. Signed-off-by: Nicola Lunghi Link: https://patch.msgid.link/20260504144520.699522-2-nick83ola@gmail.com Signed-off-by: Takashi Iwai

ALSA: usb-audio: midi2: Restart output URBs on resume

2026-05-04T15:49:16+00:00

USB MIDI 2.0 suspend saves the endpoint running state, clears it and kills all endpoint URBs. Resume restores the running state, but only restarts input endpoints. For a running output endpoint, this leaves the endpoint marked running with an empty URB queue. Output transfer progress depends on either the rawmidi trigger path starting the queue or an output completion refilling it. After suspend there is no completion left, and output data that remains queued in the raw UMP or legacy rawmidi buffer can stay stalled until userspace happens to trigger the stream again. Restore the saved state with atomic accessors, keep input endpoints restarted as before, and restart output endpoints that were running before suspend. Clear the saved suspend state after restoring it. Fixes: ff49d1df79ae ("ALSA: usb-audio: USB MIDI 2.0 UMP support") Cc: stable@vger.kernel.org Signed-off-by: Cássio Gabriel Link: https://patch.msgid.link/20260504-usb-midi2-output-resume-v1-1-c089cc8ad3c6@gmail.com Signed-off-by: Takashi Iwai

ALSA: usb-audio: Add quirk flags for JBL Pebbles

2026-05-04T15:47:06+00:00

JBL Pebbles is a pair of desktop speakers with UAC interface. Its Playback and Capture mixers use linear volume with val = 0/999/1 and 0/3996/4. Meanwhile, the reported sample rates are truncated to multiples of 0x100 (i.e., 44100 => 44032), resulting in noisy kmsg, as a warning message is printed each time a stream is opened. Add a quirk table entry matching VID/PID=0x05fc/0x0231 and applying linear volume and sample rate quirk flags, so that it can work properly. Also note that the volume control knob on device is an incremental encoder. It does nothing but sends KEY_VOLUMEUP and KEY_VOLUMEDOWN per rotation, controlling the UAC Playback volume mixer indirectly. Hence, the linear volume quirk flags also enable the volume control knob to function properly. Quirky device sample: usb 5-1.1: new full-speed USB device number 12 using xhci_hcd usb 5-1.1: New USB device found, idVendor=05fc, idProduct=0231, bcdDevice= 1.00 usb 5-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 usb 5-1.1: Product: JBL Pebbles usb 5-1.1: Manufacturer: Harman International Industries usb 5-1.1: SerialNumber: 1.0.0 usb-storage 5-1.1:1.0: USB Mass Storage device detected scsi host0: usb-storage 5-1.1:1.0 usb 5-1.1: Found last interface = 1 usb 5-1.1: 2:1: add audio endpoint 0x5 usb 5-1.1: Creating new data endpoint #5 usb 5-1.1: 2:1 Set sample rate 44100, clock 0 usb 5-1.1: current rate 44032 is different from the runtime rate 44100 usb 5-1.1: 3:1: add audio endpoint 0x84 usb 5-1.1: Creating new data endpoint #84 usb 5-1.1: 3:1 Set sample rate 44100, clock 0 usb 5-1.1: current rate 44032 is different from the runtime rate 44100 usb 5-1.1: [2] FU [PCM Playback Switch] ch = 1, val = 0/1/1 usb 5-1.1: Warning! Unlikely big volume step count (=999), linear volume or wrong cval->res? usb 5-1.1: [2] FU [PCM Playback Volume] ch = 2, val = 0/999/1 usb 5-1.1: [5] FU [Mic Capture Switch] ch = 1, val = 0/1/1 usb 5-1.1: Warning! Unlikely big volume step count (=999), linear volume or wrong cval->res? usb 5-1.1: [5] FU [Mic Capture Volume] ch = 2, val = 0/3996/4 input: Harman International Industries JBL Pebbles as /devices/pci0000:00/0000:00:08.3/0000:67:00.3/usb5/5-1/5-1.1/5-1.1:1.4/0003:05FC:0231.0018/input/input55 hid-generic 0003:05FC:0231.0018: input,hidraw2: USB HID v2.01 Device [Harman International Industries JBL Pebbles] on usb-0000:67:00.3-1.1/input4 Signed-off-by: Rong Zhang Link: https://patch.msgid.link/20260504-uac-jbl-pebbles-v1-1-c888d592a286@rong.moe Signed-off-by: Takashi Iwai