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usb: xhci-mtk: check return value in suspend/resume hooks

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Return error number if encounter errors during suspend and resume.

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Link: https://lore.kernel.org/r/1618031406-15347-1-git-send-email-chunfeng.yun@mediatek.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Chunfeng Yun 2021-04-10 13:10:02 +08:00 • committed by Greg Kroah-Hartman
parent 1373fefc62
commit 82dad9fb68
1 changed files with 27 additions and 10 deletions
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37
drivers/usb/host/xhci-mtk.c
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@ -641,18 +641,12 @@ static int xhci_mtk_remove(struct platform_device *dev)
return 0; 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) static int __maybe_unused xhci_mtk_suspend(struct device *dev)
{ {
struct xhci_hcd_mtk *mtk = dev_get_drvdata(dev); struct xhci_hcd_mtk *mtk = dev_get_drvdata(dev);
struct usb_hcd *hcd = mtk->hcd; struct usb_hcd *hcd = mtk->hcd;
struct xhci_hcd *xhci = hcd_to_xhci(hcd); struct xhci_hcd *xhci = hcd_to_xhci(hcd);
int ret;
xhci_dbg(xhci, "%s: stop port polling\n", __func__); xhci_dbg(xhci, "%s: stop port polling\n", __func__);
clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); clear_bit(HCD_FLAG_POLL_RH, &hcd->flags);
@ -660,10 +654,21 @@ static int __maybe_unused xhci_mtk_suspend(struct device *dev)
clear_bit(HCD_FLAG_POLL_RH, &xhci->shared_hcd->flags); clear_bit(HCD_FLAG_POLL_RH, &xhci->shared_hcd->flags);
del_timer_sync(&xhci->shared_hcd->rh_timer); 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); xhci_mtk_clks_disable(mtk);
usb_wakeup_set(mtk, true); usb_wakeup_set(mtk, true);
return 0; 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) static int __maybe_unused xhci_mtk_resume(struct device *dev)
@ -671,10 +676,16 @@ static int __maybe_unused xhci_mtk_resume(struct device *dev)
struct xhci_hcd_mtk *mtk = dev_get_drvdata(dev); struct xhci_hcd_mtk *mtk = dev_get_drvdata(dev);
struct usb_hcd *hcd = mtk->hcd; struct usb_hcd *hcd = mtk->hcd;
struct xhci_hcd *xhci = hcd_to_xhci(hcd); struct xhci_hcd *xhci = hcd_to_xhci(hcd);
int ret;
usb_wakeup_set(mtk, false); usb_wakeup_set(mtk, false);
xhci_mtk_clks_enable(mtk); ret = xhci_mtk_clks_enable(mtk);
xhci_mtk_host_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__); xhci_dbg(xhci, "%s: restart port polling\n", __func__);
set_bit(HCD_FLAG_POLL_RH, &xhci->shared_hcd->flags); set_bit(HCD_FLAG_POLL_RH, &xhci->shared_hcd->flags);
@ -682,6 +693,12 @@ static int __maybe_unused xhci_mtk_resume(struct device *dev)
set_bit(HCD_FLAG_POLL_RH, &hcd->flags); set_bit(HCD_FLAG_POLL_RH, &hcd->flags);
usb_hcd_poll_rh_status(hcd); usb_hcd_poll_rh_status(hcd);
return 0; 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 = { static const struct dev_pm_ops xhci_mtk_pm_ops = {