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DM USB: xHCI: WA for an isochronous crash issue

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The current xHCI mediator doesn't well support disable endpoint command.
This patch is one workaround for disable endpoint command to avoid
xHCI mediator to continue handle already dropped data.

Tracked-On: #2927
Signed-off-by: Xiaoguang Wu <xiaoguang.wu@intel.com>
Acked-by: Yu Wang <yu1.wang@intel.com>
This commit is contained in:
Xiaoguang Wu
2018-12-28 20:06:52 +08:00
committed by Eddie Dong
parent f0e7ce6a8c
commit 63743d8b9b
3 changed files with 14 additions and 0 deletions
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9
devicemodel/hw/platform/usb_pmapper.c
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@@ -190,6 +190,15 @@ usb_dev_comp_req(struct libusb_transfer *libusb_xfer)
/* async transfer */
xfer = req->xfer;
if (xfer->magic != USB_DROPPED_XFER_MAGIC)
/* FIXME: if magic is not what we expected, which means it is
* reset by Disable Endpoint command, hence this xfer from
* callback function should be discarded. This is a workaround
* and a formal implementation for Disable Endpoint command
* will replace this WA.
*/
goto out;
assert(xfer);
assert(xfer->dev);