linux-kernel - [usb-next, v3 PATCH] usb: xhci: skip phys initialization of shared hcd

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Date:   Thu, 22 Mar 2018 20:12:50 +0800
From:   Chunfeng Yun <chunfeng.yun@...iatek.com>
To:     Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
CC:     Mathias Nyman <mathias.nyman@...el.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Chunfeng Yun <chunfeng.yun@...iatek.com>,
        Roger Quadros <rogerq@...com>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-usb@...r.kernel.org>, <linux-mediatek@...ts.infradead.org>
Subject: [usb-next, v3 PATCH] usb: xhci: skip phys initialization of shared hcd

The phys has already been initialized when add primary hcd,
including usb2 phys and usb3 phys also if exist, so needn't
re-parse "phys" property again.

Signed-off-by: Chunfeng Yun <chunfeng.yun@...iatek.com>
---
V3:
    add the following info about v1 & v2 suggested by Greg
V2:
    fix it in hcd.c suggested by Roger
V1:
    skip phys initialization when add shared HCD by setting
    xhci->shared_hcd->skip_phy_initialization=1;
    for both xhci-plat.c & xhci-mtk.c files.
---
 drivers/usb/core/hcd.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index 5a92d8f..777036a 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -2757,7 +2757,7 @@ int usb_add_hcd(struct usb_hcd *hcd,
 		}
 	}
 
-	if (!hcd->skip_phy_initialization) {
+	if (!hcd->skip_phy_initialization && usb_hcd_is_primary_hcd(hcd)) {
 		hcd->phy_roothub = usb_phy_roothub_init(hcd->self.sysdev);
 		if (IS_ERR(hcd->phy_roothub)) {
 			retval = PTR_ERR(hcd->phy_roothub);
-- 
1.9.1