diff mbox series

[v2] usb: host: xhci: Do not re-initialize the XHCI HC if being removed

Message ID 20230525175102.22887-1-quic_wcheng@quicinc.com
State New
Headers
Series [v2] usb: host: xhci: Do not re-initialize the XHCI HC if being removed |

Commit Message

Wesley Cheng May 25, 2023, 5:51 p.m. UTC 
  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(-)
diff mbox series

Patch

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);