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authorPete Zaitcev <zaitcev@redhat.com>2007-05-03 16:51:16 -0700
committerGreg Kroah-Hartman <gregkh@suse.de>2007-07-12 16:29:47 -0700
commitce7cd137fced114d49178b73d468b82096a107fb (patch)
treedfc1f49df82d6ec3b301d786e79ae9481dcc83dd /drivers/usb/mon/mon_text.c
parent49cdee0ed0fce9e1bda81f5dcad8d5cce6aec983 (diff)
usbmon: Add class for binary interface
Add a class which allows for an easier integration with udev. This code was originally written by Paolo Abeni, and arrived to my tree as a part of big patch to add binary API on December 18. As I understand, Paolo always meant the class to be a part of the whole thing. This is his udev rule to go along with the patch: KERNEL=="usbmon[0-9]*", NAME="usbmon%n", MODE="0440",OWNER="root",GROUP="bin" Signed-off-by: Pete Zaitcev <zaitcev@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/mon/mon_text.c')
-rw-r--r--drivers/usb/mon/mon_text.c29
1 files changed, 18 insertions, 11 deletions
diff --git a/drivers/usb/mon/mon_text.c b/drivers/usb/mon/mon_text.c
index ec0cc51e39a..982b773d71e 100644
--- a/drivers/usb/mon/mon_text.c
+++ b/drivers/usb/mon/mon_text.c
@@ -655,20 +655,24 @@ static const struct file_operations mon_fops_text_u = {
.release = mon_text_release,
};
-int mon_text_add(struct mon_bus *mbus, int busnum)
+int mon_text_add(struct mon_bus *mbus, const struct usb_bus *ubus)
{
struct dentry *d;
enum { NAMESZ = 10 };
char name[NAMESZ];
+ int busnum = ubus? ubus->busnum: 0;
int rc;
- rc = snprintf(name, NAMESZ, "%dt", busnum);
- if (rc <= 0 || rc >= NAMESZ)
- goto err_print_t;
- d = debugfs_create_file(name, 0600, mon_dir, mbus, &mon_fops_text_t);
- if (d == NULL)
- goto err_create_t;
- mbus->dent_t = d;
+ if (ubus != NULL) {
+ rc = snprintf(name, NAMESZ, "%dt", busnum);
+ if (rc <= 0 || rc >= NAMESZ)
+ goto err_print_t;
+ d = debugfs_create_file(name, 0600, mon_dir, mbus,
+ &mon_fops_text_t);
+ if (d == NULL)
+ goto err_create_t;
+ mbus->dent_t = d;
+ }
rc = snprintf(name, NAMESZ, "%du", busnum);
if (rc <= 0 || rc >= NAMESZ)
@@ -694,8 +698,10 @@ err_print_s:
mbus->dent_u = NULL;
err_create_u:
err_print_u:
- debugfs_remove(mbus->dent_t);
- mbus->dent_t = NULL;
+ if (ubus != NULL) {
+ debugfs_remove(mbus->dent_t);
+ mbus->dent_t = NULL;
+ }
err_create_t:
err_print_t:
return 0;
@@ -704,7 +710,8 @@ err_print_t:
void mon_text_del(struct mon_bus *mbus)
{
debugfs_remove(mbus->dent_u);
- debugfs_remove(mbus->dent_t);
+ if (mbus->dent_t != NULL)
+ debugfs_remove(mbus->dent_t);
debugfs_remove(mbus->dent_s);
}