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Wed, 01 May 2019 21:56:37 -0700 (PDT) From: Nicolas Boichat To: Greg Kroah-Hartman Subject: [PATCH 2/2] usb: xhci-mtk: Do not create shared_hcd if no USB 3.0 port available Date: Thu, 2 May 2019 12:56:30 +0800 Message-Id: <20190502045631.229386-2-drinkcat@chromium.org> X-Mailer: git-send-email 2.21.0.593.g511ec345e18-goog In-Reply-To: <20190502045631.229386-1-drinkcat@chromium.org> References: <20190502045631.229386-1-drinkcat@chromium.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190501_215639_441055_D2F12CF5 X-CRM114-Status: GOOD ( 15.28 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Khuong Dinh , Mathias Nyman , linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mediatek@lists.infradead.org, Hoan Tran , Matthias Brugger , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org When the controller only supports USB 2.0, do not even create the USB 3.0 hcd/root hub. Signed-off-by: Nicolas Boichat --- drivers/usb/host/xhci-mtk.c | 44 +++++++++++++++++++++++-------------- 1 file changed, 28 insertions(+), 16 deletions(-) diff --git a/drivers/usb/host/xhci-mtk.c b/drivers/usb/host/xhci-mtk.c index 026fe18972d3e5b..189f5dc614e6e05 100644 --- a/drivers/usb/host/xhci-mtk.c +++ b/drivers/usb/host/xhci-mtk.c @@ -527,23 +527,28 @@ static int xhci_mtk_probe(struct platform_device *pdev) xhci->imod_interval = 5000; device_property_read_u32(dev, "imod-interval-ns", &xhci->imod_interval); - xhci->shared_hcd = usb_create_shared_hcd(driver, dev, + /* Only create shared_hcd when USB3.0 port is available. */ + if (xhci->usb3_rhub.num_ports > 0) { + xhci->shared_hcd = usb_create_shared_hcd(driver, dev, dev_name(dev), hcd); - if (!xhci->shared_hcd) { - ret = -ENOMEM; - goto disable_device_wakeup; + if (!xhci->shared_hcd) { + ret = -ENOMEM; + goto disable_device_wakeup; + } } ret = usb_add_hcd(hcd, irq, IRQF_SHARED); if (ret) goto put_usb3_hcd; - if (HCC_MAX_PSA(xhci->hcc_params) >= 4) - xhci->shared_hcd->can_do_streams = 1; + if (xhci->usb3_rhub.num_ports > 0) { + if (HCC_MAX_PSA(xhci->hcc_params) >= 4) + xhci->shared_hcd->can_do_streams = 1; - ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED); - if (ret) - goto dealloc_usb2_hcd; + ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED); + if (ret) + goto dealloc_usb2_hcd; + } return 0; @@ -552,7 +557,8 @@ static int xhci_mtk_probe(struct platform_device *pdev) put_usb3_hcd: xhci_mtk_sch_exit(mtk); - usb_put_hcd(xhci->shared_hcd); + if (xhci->shared_hcd) + usb_put_hcd(xhci->shared_hcd); disable_device_wakeup: device_init_wakeup(dev, false); @@ -579,12 +585,14 @@ static int xhci_mtk_remove(struct platform_device *dev) struct xhci_hcd *xhci = hcd_to_xhci(hcd); struct usb_hcd *shared_hcd = xhci->shared_hcd; - usb_remove_hcd(shared_hcd); + if (shared_hcd) + usb_remove_hcd(shared_hcd); xhci->shared_hcd = NULL; device_init_wakeup(&dev->dev, false); usb_remove_hcd(hcd); - usb_put_hcd(shared_hcd); + if (shared_hcd) + usb_put_hcd(shared_hcd); usb_put_hcd(hcd); xhci_mtk_sch_exit(mtk); xhci_mtk_clks_disable(mtk); @@ -611,8 +619,10 @@ static int __maybe_unused xhci_mtk_suspend(struct device *dev) xhci_dbg(xhci, "%s: stop port polling\n", __func__); clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); del_timer_sync(&hcd->rh_timer); - clear_bit(HCD_FLAG_POLL_RH, &xhci->shared_hcd->flags); - del_timer_sync(&xhci->shared_hcd->rh_timer); + if (xhci->shared_hcd) { + clear_bit(HCD_FLAG_POLL_RH, &xhci->shared_hcd->flags); + del_timer_sync(&xhci->shared_hcd->rh_timer); + } xhci_mtk_host_disable(mtk); xhci_mtk_clks_disable(mtk); @@ -631,8 +641,10 @@ static int __maybe_unused xhci_mtk_resume(struct device *dev) xhci_mtk_host_enable(mtk); 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); + if (xhci->shared_hcd) { + 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 0; -- 2.21.0.593.g511ec345e18-goog _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel