In current driver qcom_slim_ngd_up_worker() indefinitely
waiting for ctrl->qmi_up completion object. This is
resulting in workqueue lockup on Kthread.
Added wait_for_completion_interruptible_timeout to
allow the thread to wait for specific timeout period and
bail out instead waiting infinitely.
Signed-off-by: Viken Dadhaniya <quic_vdadhani@xxxxxxxxxxx>
---
drivers/slimbus/qcom-ngd-ctrl.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/slimbus/qcom-ngd-ctrl.c b/drivers/slimbus/qcom-ngd-ctrl.c
index efeba8275a66..c27076d8b7db 100644
--- a/drivers/slimbus/qcom-ngd-ctrl.c
+++ b/drivers/slimbus/qcom-ngd-ctrl.c
@@ -83,6 +83,7 @@
#define QCOM_SLIM_NGD_AUTOSUSPEND MSEC_PER_SEC
#define SLIM_RX_MSGQ_TIMEOUT_VAL 0x10000
+#define SLIM_QMI_TIMEOUT_MS 1000
#define SLIM_LA_MGR 0xFF
#define SLIM_ROOT_FREQ 24576000
@@ -1451,7 +1452,11 @@ static void qcom_slim_ngd_up_worker(struct work_struct *work)
ctrl = container_of(work, struct qcom_slim_ngd_ctrl, ngd_up_work);
/* Make sure qmi service is up before continuing */
- wait_for_completion_interruptible(&ctrl->qmi_up);
+ if (!wait_for_completion_interruptible_timeout(&ctrl->qmi_up,
+ msecs_to_jiffies(SLIM_QMI_TIMEOUT_MS))) {
+ dev_err(ctrl->dev, "QMI wait timeout\n");
+ return;
+ }
mutex_lock(&ctrl->ssr_lock);
qcom_slim_ngd_enable(ctrl, true);
--
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