drivers/misc/pti.c: give 'comm' function scope in pti_control_frame_b…

…uilt_and_sent()

In drivers/misc/pti.c::pti_control_frame_built_and_sent() we assign 'comm'
to 'thread_name_p' if (!thread_name).  The problem is that 'comm' then
goes out of scope and later we use 'thread_name_p' which now refers to an
out-of-scope variable.  To fix that, simply move 'comm' up to have
function scope.

Signed-off-by: Jesper Juhl <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
Cc: J Freyensee <[email protected]>
Cc: Jeremy Rocher <[email protected]>
Cc: Sergei Trofimovich <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

drivers/misc/pti.c

@@ -165,20 +165,18 @@ static void pti_write_to_aperture(struct pti_masterchannel *mc,
 static void pti_control_frame_built_and_sent(struct pti_masterchannel *mc,
 					     const char *thread_name)
 {
+	/*
+	 * Since we access the comm member in current's task_struct, we only
+	 * need to be as large as what 'comm' in that structure is.
+	 */
+	char comm[TASK_COMM_LEN];
 	struct pti_masterchannel mccontrol = {.master = CONTROL_ID,
 					      .channel = 0};
 	const char *thread_name_p;
 	const char *control_format = "%3d %3d %s";
 	u8 control_frame[CONTROL_FRAME_LEN];
 
 	if (!thread_name) {
-		/*
-		 * Since we access the comm member in current's task_struct,
-		 * we only need to be as large as what 'comm' in that
-		 * structure is.
-		 */
-		char comm[TASK_COMM_LEN];
-
 		if (!in_interrupt())
 			get_task_comm(comm, current);
 		else