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789ea77310
linux/drivers/usb/gadget/function
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Ruslan Bilovol 789ea77310 usb: gadget: f_uac2: always increase endpoint max_packet_size by one audio slot 
As per UAC2 Audio Data Formats spec (2.3.1.1 USB Packets),
if the sampling rate is a constant, the allowable variation
of number of audio slots per virtual frame is +/- 1 audio slot.

It means that endpoint should be able to accept/send +1 audio
slot.

Previous endpoint max_packet_size calculation code
was adding sometimes +1 audio slot due to DIV_ROUND_UP
behaviour which was rounding up to closest integer.
However this doesn't work if the numbers are divisible.

It had no any impact with Linux hosts which ignore
this issue, but in case of more strict Windows it
caused rejected enumeration

Thus always add +1 audio slot to endpoint's max packet size

Fixes: 913e4a90b6 ("usb: gadget: f_uac2: finalize wMaxPacketSize according to bandwidth")
Cc: Peter Chen <peter.chen@freescale.com>
Cc: <stable@vger.kernel.org> #v4.3+
Signed-off-by: Ruslan Bilovol <ruslan.bilovol@gmail.com>
Link: https://lore.kernel.org/r/1614599375-8803-2-git-send-email-ruslan.bilovol@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-03-10 09:36:12 +01:00
..
f_acm.c USB: gadget: f_acm: add support for SuperSpeed Plus 2020-12-10 16:12:20 +01:00
f_ecm.c
f_eem.c usb: gadget: function: remove redundant assignment to variable 'status' 2020-05-25 11:09:39 +03:00
f_fs.c USB: gadget: f_fs: remove likely/unlikely 2020-12-10 16:14:34 +01:00
f_hid.c usb: gadget: Use fallthrough pseudo-keyword 2020-07-10 08:55:18 +02:00
f_loopback.c usb: Fix fall-through warnings for Clang 2020-11-23 17:46:01 +01:00
f_mass_storage.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
f_mass_storage.h
f_midi.c usb/gadget: f_midi: Replace tasklet with work 2021-01-12 12:52:28 +01:00
f_ncm.c usb: gadget: f_ncm: allow using NCM in SuperSpeed Plus gadgets. 2020-10-02 09:57:41 +03:00
f_obex.c
f_phonet.c usb: gadget: Use fallthrough pseudo-keyword 2020-07-10 08:55:18 +02:00
f_printer.c Merge 5.11-rc3 into usb-next 2021-01-11 08:11:26 +01:00
f_rndis.c USB: gadget: f_rndis: fix bitrate for SuperSpeed and above 2020-12-10 16:12:16 +01:00
f_serial.c usb: gadget: f_serial: add suspend resume callbacks 2020-05-25 11:09:39 +03:00
f_sourcesink.c usb: Fix fall-through warnings for Clang 2020-11-23 17:46:01 +01:00
f_subset.c
f_tcm.c usb: gadget: config_ep_by_speed_and_alt instead of config_ep_by_speed 2020-10-02 09:57:40 +03:00
f_uac1_legacy.c usb: gadget: function: fix missing spinlock in f_uac1_legacy 2020-07-09 10:13:07 +03:00
f_uac1.c
f_uac2.c usb: gadget: f_uac2: always increase endpoint max_packet_size by one audio slot 2021-03-10 09:36:12 +01:00
f_uvc.c usb: gadget: uvc: Fix the wrong v4l2_device_unregister call 2020-10-02 09:57:45 +03:00
f_uvc.h USB: gadget: Use the correct style for SPDX License Identifier 2020-05-05 10:58:49 +03:00
g_zero.h
Makefile
ndis.h
rndis.c
rndis.h USB: gadget: Use the correct style for SPDX License Identifier 2020-05-05 10:58:49 +03:00
storage_common.c block: remove i_bdev 2020-12-01 14:53:39 -07:00
storage_common.h
tcm.h
u_audio.c usb: gadget: u_audio: clean up locking 2021-01-18 18:43:09 +01:00
u_audio.h USB: gadget: Use the correct style for SPDX License Identifier 2020-05-05 10:58:49 +03:00
u_ecm.h USB: gadget: Use the correct style for SPDX License Identifier 2020-05-05 10:58:49 +03:00
u_eem.h USB: gadget: Use the correct style for SPDX License Identifier 2020-05-05 10:58:49 +03:00
u_ether_configfs.h USB: gadget: u_ether: Fix a configfs return code 2021-03-10 09:36:12 +01:00
u_ether.c usb: gadget: u_ether: support configuring interface names. 2021-01-15 16:08:53 +01:00
u_ether.h usb: gadget: u_ether: support configuring interface names. 2021-01-15 16:08:53 +01:00
u_fs.h USB: gadget: Use the correct style for SPDX License Identifier 2020-05-05 10:58:49 +03:00
u_gether.h USB: gadget: Use the correct style for SPDX License Identifier 2020-05-05 10:58:49 +03:00
u_hid.h USB: gadget: Use the correct style for SPDX License Identifier 2020-05-05 10:58:49 +03:00
u_midi.h USB: gadget: Use the correct style for SPDX License Identifier 2020-05-05 10:58:49 +03:00
u_ncm.h USB: gadget: Use the correct style for SPDX License Identifier 2020-05-05 10:58:49 +03:00
u_phonet.h USB: gadget: Use the correct style for SPDX License Identifier 2020-05-05 10:58:49 +03:00
u_printer.h USB: gadget: Use the correct style for SPDX License Identifier 2020-05-05 10:58:49 +03:00
u_rndis.h USB: gadget: Use the correct style for SPDX License Identifier 2020-05-05 10:58:49 +03:00
u_serial.c usb: gadget: u_serial: Remove old tasklet comments 2021-01-19 13:30:52 +01:00
u_serial.h usb: gadget: u_serial.h: increase MAX_U_SERIAL_PORTS to 8 2020-06-18 10:23:22 +02:00
u_tcm.h USB: gadget: Use the correct style for SPDX License Identifier 2020-05-05 10:58:49 +03:00
u_uac1_legacy.c usb: gadget: function: u_uac1_legacy: Demote obvious misuse of kerneldoc to standard comment blocks 2020-07-09 17:19:58 +02:00
u_uac1_legacy.h USB: gadget: Use the correct style for SPDX License Identifier 2020-05-05 10:58:49 +03:00
u_uac1.h USB: gadget: Use the correct style for SPDX License Identifier 2020-05-05 10:58:49 +03:00
u_uac2.h USB: gadget: Use the correct style for SPDX License Identifier 2020-05-05 10:58:49 +03:00
u_uvc.h USB: gadget: Use the correct style for SPDX License Identifier 2020-05-05 10:58:49 +03:00
uvc_configfs.c
uvc_configfs.h USB: gadget: Use the correct style for SPDX License Identifier 2020-05-05 10:58:49 +03:00
uvc_queue.c
uvc_queue.h
uvc_v4l2.c usb: gadget: uvc_video: add worker to handle the frame pumping 2020-05-25 11:09:38 +03:00
uvc_v4l2.h USB: gadget: Use the correct style for SPDX License Identifier 2020-05-05 10:58:49 +03:00
uvc_video.c usb: gadget: uvc_video: add worker to handle the frame pumping 2020-05-25 11:09:38 +03:00
uvc_video.h usb: gadget: uvc_video: add worker to handle the frame pumping 2020-05-25 11:09:38 +03:00
uvc.h usb: gadget: uvc_video: add worker to handle the frame pumping 2020-05-25 11:09:38 +03:00