lkml.org 
[lkml]   [2017]   [Jul]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] usb: dwc3: Fix the USB 3.0 hub detection bug after warm boot
Hello Wang

thanks for your response

On Wed, Jul 12, 2017 at 02:08:04PM +0800, Baolin Wang wrote:
>Hi,
>
>On 12 July 2017 at 11:52, gustavo panizzo <gfa@zumbi.com.ar> wrote:
>> The dwc3 could not release resources when the module is built-in
>> because this module does not have shutdown method. This causes the USB
>> 3.0 hub is not able to detect after warm boot.
>>
>> Original patch by Brian Kim, updated and submitted upstream by gustavo
>> panizzo.
>>
>> Also see https://bugs.debian.org/843448
>>
>> Signed-off-by: Brian Kim <brian.kim@hardkernel.com>
>> Signed-off-by: gustavo panizzo <gfa@zumbi.com.ar>
>> ---
>> drivers/usb/dwc3/core.c | 33 +++++++++++++++++++++++++++++++++
>> 1 file changed, 33 insertions(+)
>>
>> diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
>> index 326b302fc440..f92dfe213d89 100644
>> --- a/drivers/usb/dwc3/core.c
>> +++ b/drivers/usb/dwc3/core.c
>> @@ -1259,6 +1259,38 @@ static int dwc3_probe(struct platform_device *pdev)
>> return ret;
>> }
>>
>> +static void dwc3_shutdown(struct platform_device *pdev)
>> +{
>> + struct dwc3 *dwc = platform_get_drvdata(pdev);
>> + struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
>> +
>> + pm_runtime_get_sync(&pdev->dev);
>> + /*
>> + * restore res->start back to its original value so that, in case the
>> + * probe is deferred, we don't end up getting error in request the
>> + * memory region the next time probe is called.
>> + */
>> + res->start -= DWC3_GLOBALS_REGS_START;
>> +
>> + dwc3_debugfs_exit(dwc);
>> + dwc3_core_exit_mode(dwc);
>> + dwc3_event_buffers_cleanup(dwc);

What about dwc3_event_buffers_cleanup? should I remove it from
dwc3_shutdown()?
It is already in dwc3_core_exit()


>> + dwc3_free_event_buffers(dwc);
>> +
>> + usb_phy_set_suspend(dwc->usb2_phy, 1);
>> + usb_phy_set_suspend(dwc->usb3_phy, 1);
>> +
>> + phy_power_off(dwc->usb2_generic_phy);
>> + phy_power_off(dwc->usb3_generic_phy);
>
>We've done these in dwc3_core_exit().
>
>> +
>> + dwc3_core_exit(dwc);
>> + dwc3_ulpi_exit(dwc);
>> +
>> + pm_runtime_put_sync(&pdev->dev);
>> + pm_runtime_allow(&pdev->dev);
>> + pm_runtime_disable(&pdev->dev);
>> +}
>> +
>> static int dwc3_remove(struct platform_device *pdev)
>> {
>> struct dwc3 *dwc = platform_get_drvdata(pdev);
>> @@ -1488,6 +1520,7 @@ MODULE_DEVICE_TABLE(acpi, dwc3_acpi_match);
>> static struct platform_driver dwc3_driver = {
>> .probe = dwc3_probe,
>> .remove = dwc3_remove,
>> + .shutdown = dwc3_shutdown,
>> .driver = {
>> .name = "dwc3",
>> .of_match_table = of_match_ptr(of_dwc3_match),
>> --
>> 2.11.0
>>
>> --
>> To unsubscribe from this list: send the line "unsubscribe linux-usb" in
>> the body of a message to majordomo@vger.kernel.org
>> More majordomo info at http://vger.kernel.org/majordomo-info.html
>
>
>
>--
>Baolin.wang
>Best Regards

--
IRC: gfa
GPG: 0X44BB1BA79F6C6333

\
 
 \ /
  Last update: 2017-07-13 01:21    [W:0.090 / U:0.608 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site