netconsole: switch to kstrto*() functions

[cascardo/linux.git] / drivers / net / netconsole.c

diff --git a/drivers/net/netconsole.c b/drivers/net/netconsole.c
index dfb67eb..62fdbaa 100644 (file)
--- a/drivers/net/netconsole.c
+++ b/drivers/net/netconsole.c
@@ -241,34 +241,6 @@ static struct netconsole_target *to_target(struct config_item *item)
                NULL;
 }
 
-/*
- * Wrapper over simple_strtol (base 10) with sanity and range checking.
- * We return (signed) long only because we may want to return errors.
- * Do not use this to convert numbers that are allowed to be negative.
- */
-static long strtol10_check_range(const char *cp, long min, long max)
-{
-       long ret;
-       char *p = (char *) cp;
-
-       WARN_ON(min < 0);
-       WARN_ON(max < min);
-
-       ret = simple_strtol(p, &p, 10);
-
-       if (*p && (*p != '\n')) {
-               printk(KERN_ERR "netconsole: invalid input\n");
-               return -EINVAL;
-       }
-       if ((ret < min) || (ret > max)) {
-               printk(KERN_ERR "netconsole: input %ld must be between "
-                               "%ld and %ld\n", ret, min, max);
-               return -EINVAL;
-       }
-
-       return ret;
-}
-
 /*
  * Attribute operations for netconsole_target.
  */
@@ -327,12 +299,14 @@ static ssize_t store_enabled(struct netconsole_target *nt,
                             const char *buf,
                             size_t count)
 {
+       int enabled;
        int err;
-       long enabled;
 
-       enabled = strtol10_check_range(buf, 0, 1);
-       if (enabled < 0)
-               return enabled;
+       err = kstrtoint(buf, 10, &enabled);
+       if (err < 0)
+               return err;
+       if (enabled < 0 || enabled > 1)
+               return -EINVAL;
 
        if (enabled) {  /* 1 */
 
@@ -384,8 +358,7 @@ static ssize_t store_local_port(struct netconsole_target *nt,
                                const char *buf,
                                size_t count)
 {
-       long local_port;
-#define __U16_MAX      ((__u16) ~0U)
+       int rv;
 
        if (nt->enabled) {
                printk(KERN_ERR "netconsole: target (%s) is enabled, "
@@ -394,12 +367,9 @@ static ssize_t store_local_port(struct netconsole_target *nt,
                return -EINVAL;
        }
 
-       local_port = strtol10_check_range(buf, 0, __U16_MAX);
-       if (local_port < 0)
-               return local_port;
-
-       nt->np.local_port = local_port;
-
+       rv = kstrtou16(buf, 10, &nt->np.local_port);
+       if (rv < 0)
+               return rv;
        return strnlen(buf, count);
 }
 
@@ -407,8 +377,7 @@ static ssize_t store_remote_port(struct netconsole_target *nt,
                                 const char *buf,
                                 size_t count)
 {
-       long remote_port;
-#define __U16_MAX      ((__u16) ~0U)
+       int rv;
 
        if (nt->enabled) {
                printk(KERN_ERR "netconsole: target (%s) is enabled, "
@@ -417,12 +386,9 @@ static ssize_t store_remote_port(struct netconsole_target *nt,
                return -EINVAL;
        }
 
-       remote_port = strtol10_check_range(buf, 0, __U16_MAX);
-       if (remote_port < 0)
-               return remote_port;
-
-       nt->np.remote_port = remote_port;
-
+       rv = kstrtou16(buf, 10, &nt->np.remote_port);
+       if (rv < 0)
+               return rv;
        return strnlen(buf, count);
 }
 
@@ -671,6 +637,7 @@ static int netconsole_netdev_event(struct notifier_block *this,
                goto done;
 
        spin_lock_irqsave(&target_list_lock, flags);
+restart:
        list_for_each_entry(nt, &target_list, list) {
                netconsole_target_get(nt);
                if (nt->np.dev == dev) {
@@ -683,9 +650,16 @@ static int netconsole_netdev_event(struct notifier_block *this,
                                 * rtnl_lock already held
                                 */
                                if (nt->np.dev) {
+                                       spin_unlock_irqrestore(
+                                                             &target_list_lock,
+                                                             flags);
                                        __netpoll_cleanup(&nt->np);
+                                       spin_lock_irqsave(&target_list_lock,
+                                                         flags);
                                        dev_put(nt->np.dev);
                                        nt->np.dev = NULL;
+                                       netconsole_target_put(nt);
+                                       goto restart;
                                }
                                /* Fall through */
                        case NETDEV_GOING_DOWN: