| Message ID | 20240304134228.16627-1-quic_vdadhani@quicinc.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | [v1] slimbus: qcom-ngd-ctrl: Add timeout for wait operation | expand |
On 3/6/2024 2:49 AM, Konrad Dybcio wrote: > > > On 3/4/24 14:42, Viken Dadhaniya wrote: >> 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@quicinc.com> >> --- > > Fixes: a899d324863a ("slimbus: qcom-ngd-ctrl: add Sub System Restart > support") > Cc: stable@vger.kernel.org > > Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org> > >> 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 > > This could be inlined instead Updated in v2. > > Konrad
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);
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@quicinc.com> --- drivers/slimbus/qcom-ngd-ctrl.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)