Patch "usb: host: xhci: plat: check hcc_params after add hcd" has been added to the 4.4-stable tree

This is a note to let you know that I've just added the patch titled

usb: host: xhci: plat: check hcc_params after add hcd

to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
usb-host-xhci-plat-check-hcc_params-after-add-hcd.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: William wu <[email protected]>
Date: Tue, 17 Jan 2017 15:32:07 +0800
Subject: usb: host: xhci: plat: check hcc_params after add hcd

From: William wu <[email protected]>

commit 5de4e1ea9a731cad195ce5152705c21daef3bbba upstream.

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.

---
 drivers/usb/host/xhci-plat.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

@@ -162,9 +162,6 @@ static int xhci_plat_probe(struct platfo
 			(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);

@@ -181,6 +178,9 @@ static int xhci_plat_probe(struct platfo
 	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;

Patches currently in stable-queue which might be from [email protected] are

queue-4.4/usb-host-xhci-plat-check-hcc_params-after-add-hcd.patch