[AX25]: Make ax2asc thread-proof

Ax2asc was still using a static buffer for all invocations which isn't
exactly SMP-safe.  Change ax2asc to take an additional result buffer as
the argument.  Change all callers to provide such a buffer.

Signed-off-by: Ralf Baechle DL5RB <ralf@linux-mips.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 2 deletions

diff --git a/net/rose/rose_subr.c b/net/rose/rose_subr.c
index a29a3a960fd6..02891ce2db37 100644
--- a/net/rose/rose_subr.c
+++ b/net/rose/rose_subr.c
@@ -400,6 +400,7 @@ static int rose_create_facilities(unsigned char *buffer, struct rose_sock *rose)
 {
         unsigned char *p = buffer + 1;
         char *callsign;
+        char buf[11];
         int len, nb;
 
         /* National Facilities */
@@ -456,7 +457,7 @@ static int rose_create_facilities(unsigned char *buffer, struct rose_sock *rose)
 
         *p++ = FAC_CCITT_DEST_NSAP;
 
-        callsign = ax2asc(&rose->dest_call);
+        callsign = ax2asc(buf, &rose->dest_call);
 
         *p++ = strlen(callsign) + 10;
         *p++ = (strlen(callsign) + 9) * 2;              /* ??? */
@@ -471,7 +472,7 @@ static int rose_create_facilities(unsigned char *buffer, struct rose_sock *rose)
 
         *p++ = FAC_CCITT_SRC_NSAP;
 
-        callsign = ax2asc(&rose->source_call);
+        callsign = ax2asc(buf, &rose->source_call);
 
         *p++ = strlen(callsign) + 10;
         *p++ = (strlen(callsign) + 9) * 2;              /* ??? */