From: William Wu <wulf@rock-chips.com>
Date: Fri, 30 Dec 2016 11:45:49 +0000 (+0800)
Subject: usb: xhci-plat: check hcc_params after add hcd
X-Git-Tag: firefly_0821_release~934
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=4301c33db2829da207884f4c66bba798062db033;p=firefly-linux-kernel-4.4.55.git

usb: 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 hcd.

Change-Id: I5a05ca6a8ac25e914752914abb70612849cc175e
Signed-off-by: William Wu <wulf@rock-chips.com>
---

diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
index 87a6199dc83c..8f54e5b97a04 100644
--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
@@ -172,9 +172,6 @@ static int xhci_plat_probe(struct platform_device *pdev)
 			(pdata && pdata->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);
@@ -195,6 +192,9 @@ static int xhci_plat_probe(struct platform_device *pdev)
 	if (ret)
 		goto dealloc_usb2_hcd;
 
+	if (HCC_MAX_PSA(xhci->hcc_params) >= 4)
+		xhci->shared_hcd->can_do_streams = 1;
+
 	return 0;