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 <stable@xxxxxxxxxxxxxxx> know about it.
>From 5de4e1ea9a731cad195ce5152705c21daef3bbba Mon Sep 17 00:00:00 2001
From: William wu <william.wu@xxxxxxxxxxxxxx>
Date: Tue, 17 Jan 2017 15:32:07 +0800
Subject: usb: host: xhci: plat: check hcc_params after add hcd
From: William wu <william.wu@xxxxxxxxxxxxxx>
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.
Signed-off-by: William wu <william.wu@xxxxxxxxxxxxxx>
Acked-by: Roger Quadros <rogerq@xxxxxx>
Fixes: 4ac53087d6d4 ("usb: xhci: plat: Create both HCDs before adding them")
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/host/xhci-plat.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
@@ -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 william.wu@xxxxxxxxxxxxxx are
queue-4.4/usb-host-xhci-plat-check-hcc_params-after-add-hcd.patch