AX.25: Fix sysctl registration if !CONFIG_AX25_DAMA_SLAVE

Since 49ffcf8f99e8d33ec8afb450956804af518fd788 ("sysctl: update
sysctl_check_table") setting struct ctl_table.procname = NULL does no
longer work as it used to the way the AX.25 code is expecting it to
resulting in the AX.25 sysctl registration code to break if
CONFIG_AX25_DAMA_SLAVE was not set as in some distribution kernels.
Kernel releases from 2.6.24 are affected.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 10 deletions

diff --git a/net/ax25/sysctl_net_ax25.c b/net/ax25/sysctl_net_ax25.c
index f597987b242..f288fc4aef9 100644
--- a/net/ax25/sysctl_net_ax25.c
+++ b/net/ax25/sysctl_net_ax25.c
@@ -36,6 +36,7 @@ static struct ctl_path ax25_path[] = {
         { .procname = "ax25", .ctl_name = NET_AX25, },
         { }
 };
+
 static const ctl_table ax25_param_table[] = {
         {
                 .ctl_name       = NET_AX25_IP_DEFAULT_MODE,
@@ -167,6 +168,7 @@ static const ctl_table ax25_param_table[] = {
                 .extra1         = &min_proto,
                 .extra2         = &max_proto
         },
+#ifdef CONFIG_AX25_DAMA_SLAVE
         {
                 .ctl_name       = NET_AX25_DAMA_SLAVE_TIMEOUT,
                 .procname       = "dama_slave_timeout",
@@ -177,6 +179,8 @@ static const ctl_table ax25_param_table[] = {
                 .extra1         = &min_ds_timeout,
                 .extra2         = &max_ds_timeout
         },
+#endif
+
         { .ctl_name = 0 }       /* that's all, folks! */
 };
 
@@ -210,16 +214,6 @@ void ax25_register_sysctl(void)
                 ax25_table[n].procname     = ax25_dev->dev->name;
                 ax25_table[n].mode         = 0555;
 
-#ifndef CONFIG_AX25_DAMA_SLAVE
-                /*
-                 * We do not wish to have a representation of this parameter
-                 * in /proc/sys/ when configured *not* to include the
-                 * AX.25 DAMA slave code, do we?
-                 */
-
-                child[AX25_VALUES_DS_TIMEOUT].procname = NULL;
-#endif
-
                 child[AX25_MAX_VALUES].ctl_name = 0;    /* just in case... */
 
                 for (k = 0; k < AX25_MAX_VALUES; k++)