From: Greg KH <greg@kroah.com>
To: torvalds@transmeta.com
Cc: linux-usb-devel@lists.sourceforge.net
Subject: [PATCH 15 of 16] USB usbfs filesize fix

Hi,

Here's a patch against 2.5.3-pre3 for the that fixes the bug where the
size of the usbfs device file was being reported as 0.

thanks,

greg k-h



diff -Nru a/drivers/usb/inode.c b/drivers/usb/inode.c
--- a/drivers/usb/inode.c	Tue Jan 22 12:54:25 2002
+++ b/drivers/usb/inode.c	Tue Jan 22 12:54:25 2002
@@ -678,6 +678,8 @@
 void usbfs_add_device(struct usb_device *dev)
 {
 	char name[8];
+	int i;
+	int i_size;
 
 	sprintf (name, "%03d", dev->devnum);
 	dev->dentry = fs_create_file (name,
@@ -687,6 +689,17 @@
 				      devuid, devgid);
 	if (dev->dentry == NULL)
 		return;
+
+	/* Set the size of the device's file to be
+	 * equal to the size of the device descriptors. */
+	i_size = sizeof (struct usb_device_descriptor);
+	for (i = 0; i < dev->descriptor.bNumConfigurations; ++i) {
+		struct usb_config_descriptor *config =
+			(struct usb_config_descriptor *)dev->rawdescriptors[i];
+		i_size += le16_to_cpu (config->wTotalLength);
+	}
+	if (dev->dentry->d_inode)
+		dev->dentry->d_inode->i_size = i_size;
 
 	usbfs_update_special();
 	usbdevfs_conn_disc_event();