Commit 41a38d9e authored by Ben Hutchings's avatar Ben Hutchings Committed by Greg Kroah-Hartman

Staging: rtl8192su: Fix procfs code for interfaces not named wlan0

The current code creates directories in procfs named after interfaces,
but doesn't handle renaming.  This can result in name collisions and
consequent WARNINGs.  It also means that the interface name cannot
reliably be used to remove the directory - in fact the current code
doesn't even try, and always uses "wlan0"!

Since the name of a proc_dir_entry is embedded in it, use that when
removing it.

Add a netdev notifier to catch interface renaming, and remove and
re-add the directory at this point.
Signed-off-by: default avatarBen Hutchings <ben@decadent.org.uk>
parent 9a3dfa05
...@@ -27,6 +27,7 @@ ...@@ -27,6 +27,7 @@
#include <linux/vmalloc.h> #include <linux/vmalloc.h>
#include <linux/slab.h> #include <linux/slab.h>
#include <linux/eeprom_93cx6.h> #include <linux/eeprom_93cx6.h>
#include <linux/notifier.h>
#undef LOOP_TEST #undef LOOP_TEST
#undef DUMP_RX #undef DUMP_RX
...@@ -161,6 +162,8 @@ MODULE_PARM_DESC(channels," Channel bitmask for specific locales. NYI"); ...@@ -161,6 +162,8 @@ MODULE_PARM_DESC(channels," Channel bitmask for specific locales. NYI");
static int __devinit rtl8192_usb_probe(struct usb_interface *intf, static int __devinit rtl8192_usb_probe(struct usb_interface *intf,
const struct usb_device_id *id); const struct usb_device_id *id);
static void __devexit rtl8192_usb_disconnect(struct usb_interface *intf); static void __devexit rtl8192_usb_disconnect(struct usb_interface *intf);
static const struct net_device_ops rtl8192_netdev_ops;
static struct notifier_block proc_netdev_notifier;
static struct usb_driver rtl8192_usb_driver = { static struct usb_driver rtl8192_usb_driver = {
.name = RTL819xU_MODULE_NAME, /* Driver name */ .name = RTL819xU_MODULE_NAME, /* Driver name */
...@@ -992,14 +995,22 @@ static int proc_get_stats_rx(char *page, char **start, ...@@ -992,14 +995,22 @@ static int proc_get_stats_rx(char *page, char **start,
int rtl8192_proc_module_init(void) int rtl8192_proc_module_init(void)
{ {
int ret;
RT_TRACE(COMP_INIT, "Initializing proc filesystem"); RT_TRACE(COMP_INIT, "Initializing proc filesystem");
rtl8192_proc=create_proc_entry(RTL819xU_MODULE_NAME, S_IFDIR, init_net.proc_net); rtl8192_proc=create_proc_entry(RTL819xU_MODULE_NAME, S_IFDIR, init_net.proc_net);
return rtl8192_proc ? 0 : -ENOMEM; if (!rtl8192_proc)
return -ENOMEM;
ret = register_netdevice_notifier(&proc_netdev_notifier);
if (ret)
remove_proc_entry(RTL819xU_MODULE_NAME, init_net.proc_net);
return ret;
} }
void rtl8192_proc_module_remove(void) void rtl8192_proc_module_remove(void)
{ {
unregister_netdevice_notifier(&proc_netdev_notifier);
remove_proc_entry(RTL819xU_MODULE_NAME, init_net.proc_net); remove_proc_entry(RTL819xU_MODULE_NAME, init_net.proc_net);
} }
...@@ -1027,8 +1038,7 @@ void rtl8192_proc_remove_one(struct net_device *dev) ...@@ -1027,8 +1038,7 @@ void rtl8192_proc_remove_one(struct net_device *dev)
remove_proc_entry("registers-e", priv->dir_dev); remove_proc_entry("registers-e", priv->dir_dev);
// remove_proc_entry("cck-registers",priv->dir_dev); // remove_proc_entry("cck-registers",priv->dir_dev);
// remove_proc_entry("ofdm-registers",priv->dir_dev); // remove_proc_entry("ofdm-registers",priv->dir_dev);
//remove_proc_entry(dev->name, rtl8192_proc); remove_proc_entry(priv->dir_dev->name, rtl8192_proc);
remove_proc_entry("wlan0", rtl8192_proc);
priv->dir_dev = NULL; priv->dir_dev = NULL;
} }
} }
...@@ -1145,6 +1155,25 @@ void rtl8192_proc_init_one(struct net_device *dev) ...@@ -1145,6 +1155,25 @@ void rtl8192_proc_init_one(struct net_device *dev)
dev->name); dev->name);
} }
} }
static int proc_netdev_event(struct notifier_block *this,
unsigned long event, void *ptr)
{
struct net_device *net_dev = ptr;
if (net_dev->netdev_ops == &rtl8192_netdev_ops &&
event == NETDEV_CHANGENAME) {
rtl8192_proc_remove_one(net_dev);
rtl8192_proc_init_one(net_dev);
}
return NOTIFY_DONE;
}
static struct notifier_block proc_netdev_notifier = {
.notifier_call = proc_netdev_event,
};
/**************************************************************************** /****************************************************************************
-----------------------------MISC STUFF------------------------- -----------------------------MISC STUFF-------------------------
*****************************************************************************/ *****************************************************************************/
......
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