Do not bail out with an error in mon_text_init() if debugfs is not
available, instead just return 0 and let mon_init() go ahead with
loading the binary API. Return -ENOMEM in case debugfs_create_dir()
fails for other reasons.
In mon_text_add() we need to properly return in case debugfs is not
available (mon_dir = NULL) so the mbus->text_inited member is correctly
set.
Signed-off-by: Tobias Klauser <tklauser@xxxxxxxxxx>
---
drivers/usb/mon/mon_text.c | 17 +++++++++--------
1 files changed, 9 insertions(+), 8 deletions(-)
diff --git a/drivers/usb/mon/mon_text.c b/drivers/usb/mon/mon_text.c
index c302e19..8e6b250 100644
--- a/drivers/usb/mon/mon_text.c
+++ b/drivers/usb/mon/mon_text.c
@@ -670,6 +670,9 @@ int mon_text_add(struct mon_bus *mbus, const struct usb_bus *ubus)
int busnum = ubus? ubus->busnum: 0;
int rc;
+ if (mon_dir == NULL)
+ return 0;
+
if (ubus != NULL) {
rc = snprintf(name, NAMESZ, "%dt", busnum);
if (rc <= 0 || rc >= NAMESZ)
@@ -739,14 +742,12 @@ int __init mon_text_init(void)
struct dentry *mondir;
mondir = debugfs_create_dir("usbmon", usb_debug_root);
- if (IS_ERR(mondir)) {
- printk(KERN_NOTICE TAG ": debugfs is not available\n");
- return -ENODEV;
- }
- if (mondir == NULL) {
- printk(KERN_NOTICE TAG ": unable to create usbmon directory\n");
- return -ENODEV;
- }
+ if (IS_ERR(mondir))
+ /* debugfs not available, but we can use usbmon without it */
+ return 0;
+ else if (mondir == NULL)
+ return -ENOMEM;
+
mon_dir = mondir;
return 0;
}
--
1.7.5.4
--
To unsubscribe from this list: send the line "unsubscribe linux-usb" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
