On 2024/9/20 20:45, Stephan Gerhold wrote:
> On Fri, Sep 20, 2024 at 06:07:11PM +0800, Jinjie Ruan wrote:
>> It's important to undo pm_runtime_use_autosuspend() with
>> pm_runtime_dont_use_autosuspend() at driver exit time.
>>
>> But the pm_runtime_disable() and pm_runtime_dont_use_autosuspend()
>> is missing in the error path for bam_dmux_probe(). So add it.
>>
>> Fixes: 21a0ffd9b38c ("net: wwan: Add Qualcomm BAM-DMUX WWAN network driver")
>> Signed-off-by: Jinjie Ruan <ruanjinjie@xxxxxxxxxx>
>> ---
>> drivers/net/wwan/qcom_bam_dmux.c | 12 +++++++++---
>> 1 file changed, 9 insertions(+), 3 deletions(-)
>>
>> diff --git a/drivers/net/wwan/qcom_bam_dmux.c b/drivers/net/wwan/qcom_bam_dmux.c
>> index 26ca719fa0de..34a4e8095161 100644
>> --- a/drivers/net/wwan/qcom_bam_dmux.c
>> +++ b/drivers/net/wwan/qcom_bam_dmux.c
>> @@ -823,17 +823,17 @@ static int bam_dmux_probe(struct platform_device *pdev)
>> ret = devm_request_threaded_irq(dev, pc_ack_irq, NULL, bam_dmux_pc_ack_irq,
>> IRQF_ONESHOT, NULL, dmux);
>> if (ret)
>> - return ret;
>> + goto err_disable_pm;
>>
>> ret = devm_request_threaded_irq(dev, dmux->pc_irq, NULL, bam_dmux_pc_irq,
>> IRQF_ONESHOT, NULL, dmux);
>> if (ret)
>> - return ret;
>> + goto err_disable_pm;
>>
>> ret = irq_get_irqchip_state(dmux->pc_irq, IRQCHIP_STATE_LINE_LEVEL,
>> &dmux->pc_state);
>> if (ret)
>> - return ret;
>> + goto err_disable_pm;
>>
>> /* Check if remote finished initialization before us */
>> if (dmux->pc_state) {
>> @@ -844,6 +844,12 @@ static int bam_dmux_probe(struct platform_device *pdev)
>> }
>>
>> return 0;
>> +
>> +err_disable_pm:
>> + pm_runtime_disable(dev);
>> + pm_runtime_dont_use_autosuspend(dev);
>> + pm_runtime_set_suspended(dev);
>
> Please drop the pm_runtime_set_suspended(dev); line, it should be
> unneeded since runtime PM documentation says:
>
> the initial runtime PM status of all devices is ‘suspended’
Thank you!
>
> Thanks,
> Stephan
