Merge tag 'trace-v4.1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt...

[pandora-kernel.git] / kernel / trace / trace_events.c

diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index 7da1dfe..3ab69fb 100644 (file)
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -565,6 +565,7 @@ static int __ftrace_set_clr_event(struct trace_array *tr, const char *match,
 static int ftrace_set_clr_event(struct trace_array *tr, char *buf, int set)
 {
        char *event = NULL, *sub = NULL, *match;
+       int ret;
 
        /*
         * The buf format can be <subsystem>:<event-name>
@@ -590,7 +591,13 @@ static int ftrace_set_clr_event(struct trace_array *tr, char *buf, int set)
                        event = NULL;
        }
 
-       return __ftrace_set_clr_event(tr, match, sub, event, set);
+       ret = __ftrace_set_clr_event(tr, match, sub, event, set);
+
+       /* Put back the colon to allow this to be called again */
+       if (buf)
+               *(buf - 1) = ':';
+
+       return ret;
 }
 
 /**
@@ -1753,6 +1760,8 @@ static void update_event_printk(struct ftrace_event_call *call,
                                ptr++;
                                /* Check for alpha chars like ULL */
                        } while (isalnum(*ptr));
+                       if (!*ptr)
+                               break;
                        /*
                         * A number must have some kind of delimiter after
                         * it, and we can ignore that too.
@@ -1779,12 +1788,16 @@ static void update_event_printk(struct ftrace_event_call *call,
                        do {
                                ptr++;
                        } while (isalnum(*ptr) || *ptr == '_');
+                       if (!*ptr)
+                               break;
                        /*
                         * If what comes after this variable is a '.' or
                         * '->' then we can continue to ignore that string.
                         */
                        if (*ptr == '.' || (ptr[0] == '-' && ptr[1] == '>')) {
                                ptr += *ptr == '.' ? 1 : 2;
+                               if (!*ptr)
+                                       break;
                                goto skip_more;
                        }
                        /*