Hi Alan,
On 2016/4/25 22:43, Alan Stern wrote:
> On Sat, 23 Apr 2016, Jiancheng Xue wrote:
>
>> Some generic-ehci compatible controllers have more than one reset signal
>> lines, e.g., Synopsys DWC USB2.0 Host-AHB Controller has two resets bus_reset
>> and roothub_reset. Two more resets are added in this patch in order for this
>> kind of controller to use this driver directly.
>>
>> Signed-off-by: Jiancheng Xue <xuejiancheng@xxxxxxxxxxxxx>
>
>
>> + for (rst = 0; rst < EHCI_MAX_RSTS; rst++) {
>> + priv->rsts[rst] = of_reset_control_get_by_index(
>> + dev->dev.of_node, rst);
>> + if (IS_ERR(priv->rsts[rst])) {
>> + err = PTR_ERR(priv->rsts[rst]);
>> + if (err == -EPROBE_DEFER)
>> + goto err_reset;
>> + priv->rsts[rst] = NULL;
>> + break;
>> + }
>> +
>> + err = reset_control_deassert(priv->rsts[rst]);
>> if (err)
>> - goto err_put_clks;
>> + goto err_reset;
>
> If an error occurs here...
>
Sorry. It's really a problem. I'll modify it in v2 like below:
err = reset_control_deassert(priv->rsts[rst]);
if(err) {
reset_control_put(priv->rsts[rst]);
goto err_reset;
}
>> }
>>
>> if (pdata->big_endian_desc)
>> @@ -300,8 +305,10 @@ err_power:
>> if (pdata->power_off)
>> pdata->power_off(dev);
>> err_reset:
>> - if (priv->rst)
>> - reset_control_assert(priv->rst);
>> + while (--rst >= 0) {
>> + reset_control_assert(priv->rsts[rst]);
>> + reset_control_put(priv->rsts[rst]);
>> + }
>
> You won't call reset_control_put() for the offending reset line.
>
See above.
Is it OK except this bug? If so, I'll send out v2 patch.
Thank you very much!
Regards.
Jiancheng
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