HID: intel-ish-ipc: Reset clients state on resume from D3

Browse source

When ISH resumes from D3, the connection between ishtp clients and firmware
is lost. The ish_resume() function schedules resume_work asynchronously to
re-initiate the connection and then returns immediately. This can cause a
race where the upper-layer ishtp client driver's .resume() may execute
before the connection is fully restored, leaving the client in a stale
connected state. If the client sends messages during this window, the
firmware cannot respond.

To avoid this, reset the ishtp clients' state before returning from
ish_resume() if ISH is resuming from D3.

Signed-off-by: Zhang Lixu <lixu.zhang@intel.com>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.com>

...

This commit is contained in:

Zhang Lixu 2025-10-17 10:22:15 +08:00 • committed by Jiri Kosina

parent 3cbf6544b0

commit bd1b9a8df5

1 changed files with 11 additions and 3 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

14

drivers/hid/intel-ish-hid/ipc/pci-ish.c

View file