ipc: intel_adsp_host_ipc: clear tx_ack_pending on PM resume
Fix IPC driver becoming non-operational after power management resume
due to stale tx_ack_pending state from before suspend.
After the IPC service backend refactor (commit cf7e2e63c17a), the
intel_adsp_ipc_data structure contains function pointers for
suspend/resume handlers. This prevents using `memset` to clear the
entire structure during initialization, which was previously done in
intel_adsp_ipc_init.
Without clearing tx_ack_pending on resume, if the device enters D3 state
while still waiting for an IPC acknowledgment (e.g., from a previous
test iteration), the driver remains stuck in the waiting state after
resume. This prevents sending any new IPC messages, including the
FW_READY notification after D3 exit.
The fix explicitly clears tx_ack_pending during PM_DEVICE_ACTION_RESUME
to ensure the driver starts in a clean operational state after resume,
regardless of the state before suspend.
Fixes regression introduced in commit cf7e2e63c17a
Signed-off-by: Tomasz Leman <tomasz.m.leman@intel.com>
1 file changed
