linux-kernel - [PATCH V2] usb/host: Let usb phy shutdown later

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Message-Id: <20220424015757.21993-1-surong.pang@gmail.com>
Date:   Sun, 24 Apr 2022 09:57:57 +0800
From:   Surong Pang <surong.pang@...il.com>
To:     mathias.nyman@...ux.intel.com
Cc:     mathias.nyman@...el.com, gregkh@...uxfoundation.org,
        linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org,
        surong.pang@...il.com, Orson.Zhai@...soc.com, yunguo.wu@...soc.com
Subject: [PATCH V2] usb/host: Let usb phy shutdown later

From: Surong Pang <surong.pang@...soc.com>

Let usb phy shutdown later in xhci_plat_remove function.
Some phy driver doesn't divide 3.0/2.0 very clear.
If calls usb_phy_shutdown earlier than usb_remove_hcd(hcd),
It will case 10s cmd timeout issue.

Call usb phy shutdown later has better compatibility.

Signed-off-by: Surong Pang <surong.pang@...soc.com>
---
 drivers/usb/host/xhci-plat.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
index 649ffd861b44..fe492ed99cb7 100644
--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
@@ -390,13 +390,13 @@ static int xhci_plat_remove(struct platform_device *dev)
 
 	usb_remove_hcd(shared_hcd);
 	xhci->shared_hcd = NULL;
-	usb_phy_shutdown(hcd->usb_phy);
 
 	usb_remove_hcd(hcd);
 	usb_put_hcd(shared_hcd);
 
 	clk_disable_unprepare(clk);
 	clk_disable_unprepare(reg_clk);
+	usb_phy_shutdown(hcd->usb_phy);
 	usb_put_hcd(hcd);
 
 	pm_runtime_disable(&dev->dev);
-- 
2.17.1