input: touch: radyium: avoid deadlock

Fix potential deadlock in driver

Raydium drop does not fix the problem. We need to have this
temporary fix to solve the problem.

Bug 1384590
Bug 1526923
Bug 1526923

Change-Id: Ifcb56ba5db34b42af0b4d441659d7a5fdd869943
Signed-off-by: Xiaohui Tao <xtao@nvidia.com>
Reviewed-on: http://git-master/r/289969
Reviewed-on: http://git-master/r/427256
(cherry picked from commit dbeeaf0f5de2f7c9015837669851ae217bf559ac)
Reviewed-on: http://git-master/r/428004
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Jordan Nien <jnien@nvidia.com>
Reviewed-by: Robert Collins <rcollins@nvidia.com>
Reviewed-by: Mitch Luban <mluban@nvidia.com>

diff --git a/drivers/input/touchscreen/rm31080a_ts.c b/drivers/input/touchscreen/rm31080a_ts.c
index 52586948f5be1f20e1c1b0bc098bc25684f791a9..7e2cacf1f5d9f8f2639439e6c7ee67251cec2b41 100644 (file)
--- a/drivers/input/touchscreen/rm31080a_ts.c
+++ b/drivers/input/touchscreen/rm31080a_ts.c
@@ -1261,12 +1261,16 @@ static int rm_tch_cmd_process(u8 u8_sel_case,
                        "- %d\n", p_cmd_tbl[_SUB_CMD]);*/
                        ret = RETURN_OK;
                        if (p_cmd_tbl[_SUB_CMD] == KRL_SUB_CMD_SENSOR_QU) {
+                               mutex_unlock(&lock);
                                flush_workqueue(g_st_ts.rm_workqueue);
                                g_worker_queue_is_flush = true;
+                               mutex_lock(&lock);
                        } else if (p_cmd_tbl[_SUB_CMD] ==
                                                KRL_SUB_CMD_TIMER_QU) {
+                               mutex_unlock(&lock);
                                flush_workqueue(g_st_ts.rm_timer_workqueue);
                                g_timer_queue_is_flush = true;
+                               mutex_lock(&lock);
                        } else
                                ret = RETURN_FAIL;
                        break;