@@ -630,18 +630,12 @@ static int xhci_mtk_remove(struct platform_device *dev)
return 0;
}
-/*
- * if ip sleep fails, and all clocks are disabled, access register will hang
- * AHB bus, so stop polling roothubs to avoid regs access on bus suspend.
- * and no need to check whether ip sleep failed or not; this will cause SPM
- * to wake up system immediately after system suspend complete if ip sleep
- * fails, it is what we wanted.
- */
static int __maybe_unused xhci_mtk_suspend(struct device *dev)
{
struct xhci_hcd_mtk *mtk = dev_get_drvdata(dev);
struct usb_hcd *hcd = mtk->hcd;
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+ int ret;
xhci_dbg(xhci, "%s: stop port polling\n", __func__);
clear_bit(HCD_FLAG_POLL_RH, &hcd->flags);
@@ -649,10 +643,21 @@ static int __maybe_unused xhci_mtk_suspend(struct device *dev)
clear_bit(HCD_FLAG_POLL_RH, &xhci->shared_hcd->flags);
del_timer_sync(&xhci->shared_hcd->rh_timer);
- xhci_mtk_host_disable(mtk);
+ ret = xhci_mtk_host_disable(mtk);
+ if (ret)
+ goto restart_poll_rh;
+
xhci_mtk_clks_disable(mtk);
usb_wakeup_set(mtk, true);
return 0;
+
+restart_poll_rh:
+ xhci_dbg(xhci, "%s: restart port polling\n", __func__);
+ set_bit(HCD_FLAG_POLL_RH, &xhci->shared_hcd->flags);
+ usb_hcd_poll_rh_status(xhci->shared_hcd);
+ set_bit(HCD_FLAG_POLL_RH, &hcd->flags);
+ usb_hcd_poll_rh_status(hcd);
+ return ret;
}
static int __maybe_unused xhci_mtk_resume(struct device *dev)
@@ -660,10 +665,16 @@ static int __maybe_unused xhci_mtk_resume(struct device *dev)
struct xhci_hcd_mtk *mtk = dev_get_drvdata(dev);
struct usb_hcd *hcd = mtk->hcd;
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+ int ret;
usb_wakeup_set(mtk, false);
- xhci_mtk_clks_enable(mtk);
- xhci_mtk_host_enable(mtk);
+ ret = xhci_mtk_clks_enable(mtk);
+ if (ret)
+ goto enable_wakeup;
+
+ ret = xhci_mtk_host_enable(mtk);
+ if (ret)
+ goto disable_clks;
xhci_dbg(xhci, "%s: restart port polling\n", __func__);
set_bit(HCD_FLAG_POLL_RH, &xhci->shared_hcd->flags);
@@ -671,6 +682,12 @@ static int __maybe_unused xhci_mtk_resume(struct device *dev)
set_bit(HCD_FLAG_POLL_RH, &hcd->flags);
usb_hcd_poll_rh_status(hcd);
return 0;
+
+disable_clks:
+ xhci_mtk_clks_disable(mtk);
+enable_wakeup:
+ usb_wakeup_set(mtk, true);
+ return ret;
}
static const struct dev_pm_ops xhci_mtk_pm_ops = {
Return error number if encounter errors during suspend and resume. Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com> --- drivers/usb/host/xhci-mtk.c | 37 +++++++++++++++++++++++++++---------- 1 file changed, 27 insertions(+), 10 deletions(-)