| Message ID | 20230531222719.14143-2-quic_wcheng@quicinc.com (mailing list archive) |
|---|---|
| State | Accepted |
| Commit | fb2ce17874cf3c3c183e5fd75144ffbe2313bf31 |
| Headers | show |
| Series | Avoid re-initializing XHCI HC during removal | expand |
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c index b81313ffeb76..02a30b883bde 100644 --- a/drivers/usb/host/xhci.c +++ b/drivers/usb/host/xhci.c @@ -1028,7 +1028,8 @@ int xhci_resume(struct xhci_hcd *xhci, pm_message_t msg) temp = readl(&xhci->op_regs->status); /* re-initialize the HC on Restore Error, or Host Controller Error */ - if (temp & (STS_SRE | STS_HCE)) { + if ((temp & (STS_SRE | STS_HCE)) && + !(xhci->xhc_state & XHCI_STATE_REMOVING)) { reinit_xhc = true; if (!xhci->broken_suspend) xhci_warn(xhci, "xHC error in resume, USBSTS 0x%x, Reinit\n", temp);
During XHCI resume, if there was a host controller error detected the routine will attempt to re-initialize the XHCI HC, so that it can return back to an operational state. If the XHCI host controller is being removed, this sequence would be already handled within the XHCI halt path, leading to a duplicate set of reg ops/calls. In addition, since the XHCI bus is being removed, the overhead added in restarting the HCD is unnecessary. Check for the XHC state before setting the reinit_xhc parameter, which is responsible for triggering the restart. Signed-off-by: Wesley Cheng <quic_wcheng@quicinc.com> --- drivers/usb/host/xhci.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)