linux-kernel - [PATCH 1/1] usb: Apply hardware LPM attributes to 3.1 device

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Message-Id: <1507878590-21278-1-git-send-email-baolu.lu@linux.intel.com>
Date:   Fri, 13 Oct 2017 15:09:50 +0800
From:   Lu Baolu <baolu.lu@...ux.intel.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        Lu Baolu <baolu.lu@...ux.intel.com>
Subject: [PATCH 1/1] usb: Apply hardware LPM attributes to 3.1 device

The devices running at SuperSpeedPlus speed are also LPM capable.
Apply usb3 hardware LPM attributes to those devices as well.

Signed-off-by: Lu Baolu <baolu.lu@...ux.intel.com>
---
 drivers/usb/core/sysfs.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/core/sysfs.c b/drivers/usb/core/sysfs.c
index d930bfd..fa5d47d 100644
--- a/drivers/usb/core/sysfs.c
+++ b/drivers/usb/core/sysfs.c
@@ -654,7 +654,8 @@ static int add_power_attributes(struct device *dev)
 		if (udev->usb2_hw_lpm_capable == 1)
 			rc = sysfs_merge_group(&dev->kobj,
 					&usb2_hardware_lpm_attr_group);
-		if (udev->speed == USB_SPEED_SUPER &&
+		if ((udev->speed == USB_SPEED_SUPER ||
+		     udev->speed == USB_SPEED_SUPER_PLUS) &&
 				udev->lpm_capable == 1)
 			rc = sysfs_merge_group(&dev->kobj,
 					&usb3_hardware_lpm_attr_group);
-- 
2.7.4