Commit 2da41d5f authored by Alan Stern's avatar Alan Stern Committed by Greg Kroah-Hartman

USB: snoop processes opening usbfs device files

This patch (as1148) adds a new "snoop" message to usbfs when a device
file is opened, identifying the process responsible.  This comes in
extremely handy when trying to determine which program is doing some
unwanted USB access.
Signed-off-by: default avatarAlan Stern <stern@rowland.harvard.edu>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent bb78a825
...@@ -624,6 +624,8 @@ static int usbdev_open(struct inode *inode, struct file *file) ...@@ -624,6 +624,8 @@ static int usbdev_open(struct inode *inode, struct file *file)
smp_wmb(); smp_wmb();
list_add_tail(&ps->list, &dev->filelist); list_add_tail(&ps->list, &dev->filelist);
file->private_data = ps; file->private_data = ps;
snoop(&dev->dev, "opened by process %d: %s\n", task_pid_nr(current),
current->comm);
out: out:
if (ret) { if (ret) {
kfree(ps); kfree(ps);
......
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