when the current process is doing a rpc call from optee, and if there is a signal pending on the process, it will enter dead loop if the tee-supplicant is working correctly, fix the problem by breaking out the loop when the rpc job is finished.
Signed-off-by: Zeng Tao <[email protected]> --- drivers/tee/optee/supp.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/tee/optee/supp.c b/drivers/tee/optee/supp.c index b4ea067..170dedb 100644 --- a/drivers/tee/optee/supp.c +++ b/drivers/tee/optee/supp.c @@ -107,6 +107,13 @@ u32 optee_supp_thrd_req(struct tee_context *ctx, u32 func, size_t num_params, mutex_unlock(&supp->ctx_mutex); if (interruptable) break; + + /* + * if there is signal pending, and the supplicant has finished + * the rpc job, we need to break out the loop + */ + if (try_wait_for_completion(&supp->data_from_supp)) + break; } ret = supp->ret; -- 2.7.4
