soundwire: debugfs: replace writable string helper

debugfs_create_str() is being made read-only because its generic write
path is hard to make safe without adding more locking to the helper.

Convert the SoundWire firmware_file entry to a local write-only file
operation before removing writable string support from
debugfs_create_str().

Copy the firmware name before request_firmware() so later debugfs writes
cannot replace the string while it is being used.

Signed-off-by: Yichong Chen <chenyichong@uniontech.com>
Link: https://patch.msgid.link/20260807100053.1089834-3-chenyichong@uniontech.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

0 files changed, 0 insertions, 0 deletions