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DM USB: xHCI: refine the logic of Stop Endpoint cmd 

When the Stop Endpoint command is trapped, should not clear all
the data structure. Instead, only reset the ring buffer.

The reason is the xHCI may continue queue TRB without doing whole
initializing process again.

Tracked-On: #3401
Signed-off-by: Xiaoguang Wu <xiaoguang.wu@intel.com>
Acked-by: Yu Wang <yu1.wang@intel.com>
This commit is contained in:
Xiaoguang Wu 2019-07-05 10:15:08 +08:00 committed by wenlingz
parent 5686898291
commit c3d4cc36e1
1 changed files with 4 additions and 3 deletions
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7
devicemodel/hw/pci/xhci.c
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@ -1321,6 +1321,7 @@ pci_xhci_portregs_write(struct pci_xhci_vdev *xdev,
break;
UPRINTF(LDBG, "Port new PLS: %d\r\n", newpls);
switch (newpls) {
case 0: /* U0 */
case 3: /* U3 */
@ -2215,10 +2216,10 @@ pci_xhci_cmd_reset_ep(struct pci_xhci_vdev *xdev,
/* let usb_dev_comp_req to free the memory */
libusb_cancel_transfer(r->trn);
}
memset(xfer, 0, sizeof(*xfer));
if (devep->ep_xfer)
memset(devep->ep_xfer, 0, sizeof(*devep->ep_xfer));
xfer->ndata = 0;
xfer->head = 0;
xfer->tail = 0;
ep_ctx->dwEpCtx0 = (ep_ctx->dwEpCtx0 & ~0x7) | XHCI_ST_EPCTX_STOPPED;