HID: amd_sfh: Serialize access to the shared emp2 pointer

Browse source

The SFH accessors reach the device through a file-global emp2 pointer
that is published at probe and cleared on remove. amd_get_sfh_info() is
exported and called from other modules on unrelated threads, so a reader
can observe a non-NULL emp2 and then race a concurrent unbind that clears
it and frees the device.

Serialize the emp2 publish/clear and all readers under a mutex, so a
reader either sees a live device for the whole access or sees NULL.

Signed-off-by: Basavaraj Natikar <Basavaraj.Natikar@amd.com>
Signed-off-by: Jiri Kosina <jkosina@suse.com>

...

This commit is contained in:

Basavaraj Natikar 2026-08-03 23:22:27 +05:30 • committed by Jiri Kosina

parent 1a73a4e767

commit c57016bcf6

1 changed files with 6 additions and 0 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

6

drivers/hid/amd-sfh-hid/sfh1_1/amd_sfh_interface.c

View file