linux-kernel - [PATCH] usb: host: ehci-tegra: request deferred probe when failing to get phy

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Message-ID: <1419416190-4321-1-git-send-email-vinceh@nvidia.com>
Date:	Wed, 24 Dec 2014 18:16:30 +0800
From:	Vince Hsu <vinceh@...dia.com>
To:	stern@...land.harvard.edu, gregkh@...uxfoundation.org,
	swarren@...dotorg.org, thierry.reding@...il.com, gnurou@...il.com
CC:	linux-usb@...r.kernel.org, linux-tegra@...r.kernel.org,
	linux-kernel@...r.kernel.org, Vince Hsu <vinceh@...dia.com>
Subject: [PATCH] usb: host: ehci-tegra: request deferred probe when failing to get phy

The commit 1290a958d48e ("usb: phy: propagate __of_usb_find_phy()'s error on
failure") changed the condition to return -EPROBE_DEFER to host driver.
Originally the Tegra host driver depended on the returned -EPROBE_DEFER to
get the phy device later when booting. Now we have to do that explicitly.

Signed-off-by: Vince Hsu <vinceh@...dia.com>
---
Hi,

This fixes a regression found on 3.19-rc1. The USB host can't be probed and
the USB failed on Jetson TK1.

Thanks,
Vince


 drivers/usb/host/ehci-tegra.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/host/ehci-tegra.c b/drivers/usb/host/ehci-tegra.c
index 19a9af1b4d74..ff9af29b4e9f 100644
--- a/drivers/usb/host/ehci-tegra.c
+++ b/drivers/usb/host/ehci-tegra.c
@@ -451,7 +451,7 @@ static int tegra_ehci_probe(struct platform_device *pdev)
 
 	u_phy = devm_usb_get_phy_by_phandle(&pdev->dev, "nvidia,phy", 0);
 	if (IS_ERR(u_phy)) {
-		err = PTR_ERR(u_phy);
+		err = -EPROBE_DEFER;
 		goto cleanup_clk_en;
 	}
 	hcd->usb_phy = u_phy;
-- 
1.9.1

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