linux/tools/usb
Zongmin Zhou cfcd7b29e5 usbip: tools: add hint when no exported devices are found
When refresh_exported_devices() finds no devices, it's helpful to
inform users about potential causes. This could be due to:

1. The usbip driver module is not loaded.
2. No devices have been exported yet.

Add an informational message to guide users when ndevs == 0.

Also update the condition in usbip_host_driver_open() and
usbip_device_driver_open() to check both ret and ndevs == 0,
and change err() to info().

Message visibility by scenario:
- usbipd (console mode): Show on console/serial, this allows instant
  visibility for debugging.
- usbipd -D (daemon mode): Message logged to syslog, can keep logs for
  later traceability in production. Also can use "journalctl -f" to
  trace on console.

Suggested-by: Shuah Khan <skhan@linuxfoundation.org>
Signed-off-by: Zongmin Zhou <zhouzongmin@kylinos.cn>
Reviewed-by: Shuah Khan <skhan@linuxfoundation.org>
Link: https://patch.msgid.link/20260402083204.53179-1-min_halo@163.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2026-04-11 12:02:00 +02:00
..
ffs-aio-example tools: usb: ffs-aio-example: Fix build error with aarch64-*-gnu-gcc toolchain(s) 2022-11-09 12:37:56 +01:00
usbip usbip: tools: add hint when no exported devices are found 2026-04-11 12:02:00 +02:00
.gitignore .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
Build tools: usb: move to tools buildsystem 2020-08-19 14:11:44 +02:00
ffs-test.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
hcd-tests.sh treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
Makefile kbuild: replace $(if A,A,B) with $(or A,B) 2022-02-15 12:25:56 +09:00
p9_fwd.py tools: usb: p9_fwd: add usb gadget packet forwarder script 2024-09-03 09:57:08 +02:00
testusb.c tools: usb: testusb: Add super-plus speed reporting 2022-07-08 14:54:49 +02:00