[PATCH 4.14 086/217] usb: xhci: remove the code build warning

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4.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Dongjiu Geng <gengdongjiu@xxxxxxxxxx>

[ Upstream commit 36eb93509c45d0bdbd8d09a01ab9d857972f5963 ]

Initialize the 'err' variate to remove the build warning,
the warning is shown as below:

drivers/usb/host/xhci-tegra.c: In function 'tegra_xusb_mbox_thread':
drivers/usb/host/xhci-tegra.c:552:6: warning: 'err' may be used uninitialized in this function [-Wuninitialized]
drivers/usb/host/xhci-tegra.c:482:6: note: 'err' was declared here

Fixes: e84fce0f8837 ("usb: xhci: Add NVIDIA Tegra XUSB controller driver")
Signed-off-by: Dongjiu Geng <gengdongjiu@xxxxxxxxxx>
Acked-by: Thierry Reding <treding@xxxxxxxxxx>
Acked-by: Jon Hunter <jonathanh@xxxxxxxxxx>
Signed-off-by: Mathias Nyman <mathias.nyman@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/usb/host/xhci-tegra.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/usb/host/xhci-tegra.c
+++ b/drivers/usb/host/xhci-tegra.c
@@ -482,7 +482,7 @@ static void tegra_xusb_mbox_handle(struc
 	unsigned long mask;
 	unsigned int port;
 	bool idle, enable;
-	int err;
+	int err = 0;
 
 	memset(&rsp, 0, sizeof(rsp));
 





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