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DM USB: modify disconnecting logic to support Windows 10

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The Windows 10 feeds back quicker than Linux OS when error occured
due to device disconnecting, it will quickly reset the xHCI controller
before the DM starts to emulate disconnect event and it may cause some
unexpected errors such as crash.

This patch will do one more check when error happens, if the error
is induced by device disconnecting, the DM will not report error and
just wait until the disconnect event is reported to the guest. This
change could produce the correct hehavior as we expected.

Tracked-On: #3628
Signed-off-by: Xiaoguang Wu <xiaoguang.wu@intel.com>
Acked-by: Yu Wang <yu1.wang@intel.com>
This commit is contained in:
Xiaoguang Wu
2019-09-11 00:07:37 +08:00
committed by wenlingz
parent 06781b37e9
commit e9211514e7
3 changed files with 23 additions and 0 deletions
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8
devicemodel/hw/platform/usb_pmapper.c
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@@ -214,6 +214,14 @@ usb_dev_comp_cb(struct libusb_transfer *trn)
xfer->status = USB_ERR_SHORT_XFER;
goto out;
case LIBUSB_TRANSFER_ERROR:
/*
* If this error happened due to device disconnecting, there is
* nothing should do and just wait usb_dev_native_sys_disconn_cb
* to do the 'unplugging process'.
*/
if (usb_native_is_device_existed(&info->path) == 0)
goto cancel_out;
is_stalled = 1;
xfer->status = USB_ERR_STALLED;
goto stall_out;