diff options
| author | Chunfeng Yun <chunfeng.yun@mediatek.com> | 2021-04-16 14:48:26 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-04-22 11:02:07 +0200 |
| commit | 5951b7c20f1121d94cd8a3ef102b63863c955025 (patch) | |
| tree | c25a078de0cf4537166d1ca101a29e5ab56e6e9a /drivers/usb/host | |
| parent | ca0584c40a6648ae2c7f2ef50446af2f7bdf82db (diff) | |
usb: xhci-mtk: remove bus status check
PM will take care of the status of child device, so no need
check each port anymore.
Suggested-by: Ikjoon Jang <ikjn@chromium.org>
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Link: https://lore.kernel.org/r/1618555706-6810-1-git-send-email-chunfeng.yun@mediatek.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/host')
| -rw-r--r-- | drivers/usb/host/xhci-mtk.c | 43 |
1 files changed, 2 insertions, 41 deletions
diff --git a/drivers/usb/host/xhci-mtk.c b/drivers/usb/host/xhci-mtk.c index 874f9ed0e535..b2058b3bc834 100644 --- a/drivers/usb/host/xhci-mtk.c +++ b/drivers/usb/host/xhci-mtk.c @@ -665,42 +665,6 @@ enable_wakeup: return ret; } -static int check_rhub_status(struct xhci_hcd *xhci, struct xhci_hub *rhub) -{ - u32 suspended_ports; - u32 status; - int num_ports; - int i; - - num_ports = rhub->num_ports; - suspended_ports = rhub->bus_state.suspended_ports; - for (i = 0; i < num_ports; i++) { - if (!(suspended_ports & BIT(i))) { - status = readl(rhub->ports[i]->addr); - if (status & PORT_CONNECT) - return -EBUSY; - } - } - - return 0; -} - -/* - * check the bus whether it could suspend or not - * the bus will suspend if the downstream ports are already suspended, - * or no devices connected. - */ -static int check_bus_status(struct xhci_hcd *xhci) -{ - int ret; - - ret = check_rhub_status(xhci, &xhci->usb3_rhub); - if (ret) - return ret; - - return check_rhub_status(xhci, &xhci->usb2_rhub); -} - static int __maybe_unused xhci_mtk_runtime_suspend(struct device *dev) { struct xhci_hcd_mtk *mtk = dev_get_drvdata(dev); @@ -710,11 +674,8 @@ static int __maybe_unused xhci_mtk_runtime_suspend(struct device *dev) if (xhci->xhc_state) return -ESHUTDOWN; - if (device_may_wakeup(dev)) { - ret = check_bus_status(xhci); - if (!ret) - ret = xhci_mtk_suspend(dev); - } + if (device_may_wakeup(dev)) + ret = xhci_mtk_suspend(dev); /* -EBUSY: let PM automatically reschedule another autosuspend */ return ret ? -EBUSY : 0; |