linux-kernel - [PATCH v2] usb: core: sysfs: Unmerge @usb3_hardware_lpm_attr_group in remove_power

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Message-Id: <20240820-sysfs_fix-v2-1-a9441487077e@quicinc.com>
Date: Tue, 20 Aug 2024 19:01:27 +0800
From: Zijun Hu <zijun_hu@...oud.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
 Kevin Strasser <kevin.strasser@...ux.intel.com>
Cc: Zijun Hu <zijun_hu@...oud.com>, linux-usb@...r.kernel.org, 
 linux-kernel@...r.kernel.org, Zijun Hu <quic_zijuhu@...cinc.com>, 
 stable@...r.kernel.org
Subject: [PATCH v2] usb: core: sysfs: Unmerge @usb3_hardware_lpm_attr_group
 in remove_power_attributes()

From: Zijun Hu <quic_zijuhu@...cinc.com>

Device attribute group @usb3_hardware_lpm_attr_group is merged by
add_power_attributes(), but it is not unmerged explicitly, fixed by
unmerging it in remove_power_attributes().

Fixes: 655fe4effe0f ("usbcore: add sysfs support to xHCI usb3 hardware LPM")
Cc: stable@...r.kernel.org
Signed-off-by: Zijun Hu <quic_zijuhu@...cinc.com>
---
Changes in v2:
- Add stable tag
- Link to v1: https://lore.kernel.org/r/20240814-sysfs_fix-v1-1-2224a29a259b@quicinc.com
---
 drivers/usb/core/sysfs.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/usb/core/sysfs.c b/drivers/usb/core/sysfs.c
index d83231d6736a..61b6d978892c 100644
--- a/drivers/usb/core/sysfs.c
+++ b/drivers/usb/core/sysfs.c
@@ -670,6 +670,7 @@ static int add_power_attributes(struct device *dev)
 
 static void remove_power_attributes(struct device *dev)
 {
+	sysfs_unmerge_group(&dev->kobj, &usb3_hardware_lpm_attr_group);
 	sysfs_unmerge_group(&dev->kobj, &usb2_hardware_lpm_attr_group);
 	sysfs_unmerge_group(&dev->kobj, &power_attr_group);
 }

---
base-commit: ca7df2c7bb5f83fe46aa9ce998b7352c6b28f3a1
change-id: 20240814-sysfs_fix-2206de9b0179

Best regards,
-- 
Zijun Hu <quic_zijuhu@...cinc.com>