[PATCH] usb: gadget: composite: enable BESL support

[Felipe Balbi]

According to USB 2.0 ECN Errata for Link Power
Management (USB2-LPM-Errata-final.pdf), BESL
must be enabled if LPM is enabled.

This helps with USB30CV TD 9.21 LPM L1
Suspend Resume Test.

Cc: <stable@xxxxxxxxxxxxxxx> # 3.14
Signed-off-by: Felipe Balbi <balbi@xxxxxx>
Signed-off-by: Du, Changbin <changbin.du@xxxxxxxxx>
---
Hi,

This patch was introduced on v3.18. However the issue fixed already existed on
v3.14 and v3.14 is a long term support version.

So propose to backport it over there as well.

Du, Changbin
---
 drivers/usb/gadget/composite.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c
index a8c18df..f6a51fd 100644
--- a/drivers/usb/gadget/composite.c
+++ b/drivers/usb/gadget/composite.c
@@ -560,7 +560,7 @@ static int bos_desc(struct usb_composite_dev *cdev)
 	usb_ext->bLength = USB_DT_USB_EXT_CAP_SIZE;
 	usb_ext->bDescriptorType = USB_DT_DEVICE_CAPABILITY;
 	usb_ext->bDevCapabilityType = USB_CAP_TYPE_EXT;
-	usb_ext->bmAttributes = cpu_to_le32(USB_LPM_SUPPORT);
+	usb_ext->bmAttributes = cpu_to_le32(USB_LPM_SUPPORT | USB_BESL_SUPPORT);
 
 	/*
 	 * The Superspeed USB Capability descriptor shall be implemented by all
-- 
1.9.1

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