From 5de4e1ea9a731cad195ce5152705c21daef3bbba Mon Sep 17 00:00:00 2001 From: William wu Date: Tue, 17 Jan 2017 15:32:07 +0800 Subject: [PATCH] usb: host: xhci: plat: check hcc_params after add hcd The commit 4ac53087d6d4 ("usb: xhci: plat: Create both HCDs before adding them") move add hcd to the end of probe, this cause hcc_params uninitiated, because xHCI driver sets hcc_params in xhci_gen_setup() called from usb_add_hcd(). This patch checks the Maximum Primary Stream Array Size in the hcc_params register after add primary hcd. Signed-off-by: William wu Acked-by: Roger Quadros Cc: stable # 4.2+ Fixes: 4ac53087d6d4 ("usb: xhci: plat: Create both HCDs before adding them") Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/xhci-plat.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c index ddfab301e366..f96caeb4baab 100644 --- a/drivers/usb/host/xhci-plat.c +++ b/drivers/usb/host/xhci-plat.c @@ -232,9 +232,6 @@ static int xhci_plat_probe(struct platform_device *pdev) if (device_property_read_bool(&pdev->dev, "usb3-lpm-capable")) xhci->quirks |= XHCI_LPM_SUPPORT; - if (HCC_MAX_PSA(xhci->hcc_params) >= 4) - xhci->shared_hcd->can_do_streams = 1; - hcd->usb_phy = devm_usb_get_phy_by_phandle(&pdev->dev, "usb-phy", 0); if (IS_ERR(hcd->usb_phy)) { ret = PTR_ERR(hcd->usb_phy); @@ -251,6 +248,9 @@ static int xhci_plat_probe(struct platform_device *pdev) if (ret) goto disable_usb_phy; + 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; -- 2.20.1