linux-kernel - [PATCH v3] usbip: vhci_hcd indicate failed message

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Date:   Mon, 16 Sep 2019 23:09:21 +0800
From:   Mao Wenan <maowenan@...wei.com>
To:     <valentina.manea.m@...il.com>, <shuah@...nel.org>,
        <gregkh@...uxfoundation.org>
CC:     <linux-usb@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <kernel-janitors@...r.kernel.org>, Mao Wenan <maowenan@...wei.com>
Subject: [PATCH v3] usbip: vhci_hcd indicate failed message

If the return value of vhci_init_attr_group and
sysfs_create_group is non-zero, which mean they failed
to init attr_group and create sysfs group, so it would
better add 'failed' message to indicate that.
This patch also change pr_err to dev_err to trace which
device is failed.

Fixes: 0775a9cbc694 ("usbip: vhci extension: modifications to vhci driver")
Signed-off-by: Mao Wenan <maowenan@...wei.com>
---
 v2: change pr_err to dev_err.
 v3: add error code in failed messages.
 drivers/usb/usbip/vhci_hcd.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/usbip/vhci_hcd.c b/drivers/usb/usbip/vhci_hcd.c
index 000ab7225717..144507751eae 100644
--- a/drivers/usb/usbip/vhci_hcd.c
+++ b/drivers/usb/usbip/vhci_hcd.c
@@ -1185,12 +1185,12 @@ static int vhci_start(struct usb_hcd *hcd)
 	if (id == 0 && usb_hcd_is_primary_hcd(hcd)) {
 		err = vhci_init_attr_group();
 		if (err) {
-			pr_err("init attr group\n");
+			dev_err(hcd_dev(hcd), "init attr group failed, err = %d\n", err);
 			return err;
 		}
 		err = sysfs_create_group(&hcd_dev(hcd)->kobj, &vhci_attr_group);
 		if (err) {
-			pr_err("create sysfs files\n");
+			dev_err(hcd_dev(hcd), "create sysfs files failed, err = %d\n", err);
 			vhci_finish_attr_group();
 			return err;
 		}
-- 
2.20.1