[PATCH v2 0/6] USB: add usb_make_subpath() to replace strlcat() in input drivers

[Shihuang Liu <shlomojune6@gmail.com>]

Several USB input drivers build their physical device paths by calling
usb_make_path() and then appending "/input0" or "/input1" with strlcat().

In preparation for removing the deprecated strlcat() API [1], introduce
usb_make_subpath() and convert these callers to use it.

Patch 1 adds the helper in include/linux/usb.h. Patches 2-6 convert the
joystick, misc, mouse, tablet and touchscreen drivers, respectively.

Link: https://github.com/KSPP/linux/issues/370 [1]
Signed-off-by: Shihuang Liu <shlomojune6@gmail.com>

---

Changes in v2:
  - Add usb_make_subpath() as the first patch in the series.
  - Use the helper instead of open-coding strnlen() and strscpy() in
    each input driver.
  - Link to v1: https://lore.kernel.org/all/20261016170411.51025-1-shlomojune6@gmail.com/

---

Shihuang Liu (6):
  USB: add usb_make_subpath() for formatted device subpaths
  Input: joystick - use usb_make_subpath()
  Input: misc - use usb_make_subpath()
  Input: mouse - use usb_make_subpath()
  Input: tablet - use usb_make_subpath()
  Input: touchscreen - use usb_make_subpath()

 drivers/input/joystick/pxrc.c              |  3 +--
 drivers/input/joystick/xpad.c              |  3 +--
 drivers/input/misc/ati_remote2.c           |  3 +--
 drivers/input/misc/cm109.c                 |  3 +--
 drivers/input/misc/ims-pcu.c               |  6 ++---
 drivers/input/misc/keyspan_remote.c        |  3 +--
 drivers/input/misc/powermate.c             |  3 +--
 drivers/input/misc/yealink.c               |  3 +--
 drivers/input/mouse/appletouch.c           |  3 +--
 drivers/input/mouse/bcm5974.c              |  3 +--
 drivers/input/mouse/synaptics_usb.c        |  3 +--
 drivers/input/tablet/acecad.c              |  3 +--
 drivers/input/tablet/aiptek.c              |  6 ++---
 drivers/input/tablet/hanwang.c             |  3 +--
 drivers/input/tablet/kbtab.c               |  3 +--
 drivers/input/tablet/pegasus_notetaker.c   |  3 +--
 drivers/input/touchscreen/sur40.c          |  3 +--
 drivers/input/touchscreen/usbtouchscreen.c |  3 +--
 include/linux/usb.h                        | 29 ++++++++++++++++++++++
 19 files changed, 49 insertions(+), 40 deletions(-)

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2.43.0