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Thu, 15 Apr 2021 23:48:35 -0700 Received: from mtkcas11.mediatek.inc (172.21.101.40) by mtkmbs06n2.mediatek.inc (172.21.101.130) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Fri, 16 Apr 2021 14:48:32 +0800 Received: from localhost.localdomain (10.17.3.153) by mtkcas11.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Fri, 16 Apr 2021 14:48:31 +0800 From: Chunfeng Yun To: Mathias Nyman , Greg Kroah-Hartman CC: Chunfeng Yun , Matthias Brugger , , , , , Ikjoon Jang , "Nicolas Boichat" , Eddie Hung Subject: [next PATCH] usb: xhci-mtk: remove bus status check Date: Fri, 16 Apr 2021 14:48:26 +0800 Message-ID: <1618555706-6810-1-git-send-email-chunfeng.yun@mediatek.com> X-Mailer: git-send-email 1.8.1.1.dirty MIME-Version: 1.0 X-TM-SNTS-SMTP: 2F30F745CAD38CD33E7450348FE77EDF66EBF882B5AE109122F72EB4A79340A42000:8 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210415_234842_559563_01744756 X-CRM114-Status: GOOD ( 12.87 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org PM will take care of the status of child device, so no need check each port anymore. Suggested-by: Ikjoon Jang Signed-off-by: Chunfeng Yun --- drivers/usb/host/xhci-mtk.c | 43 ++----------------------------------- 1 file changed, 2 insertions(+), 41 deletions(-) diff --git a/drivers/usb/host/xhci-mtk.c b/drivers/usb/host/xhci-mtk.c index d4c455eecb8d..1fdeb315a124 100644 --- a/drivers/usb/host/xhci-mtk.c +++ b/drivers/usb/host/xhci-mtk.c @@ -654,42 +654,6 @@ static int __maybe_unused xhci_mtk_resume(struct device *dev) 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); @@ -699,11 +663,8 @@ 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;