drivers/misc/pti.c: give 'comm' function scope in pti_control_frame_built_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 <jj@chaosbits.net>
Cc: Greg Kroah-Hartman <gregkh@suse.de>
Cc: J Freyensee <james_p_freyensee@linux.intel.com>
Cc: Jeremy Rocher <rocher.jeremy@gmail.com>
Cc: Sergei Trofimovich <slyfox@gentoo.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 5 insertions, 7 deletions

diff --git a/drivers/misc/pti.c b/drivers/misc/pti.c
index 06df1877ad0..0b56e3f4357 100644
--- a/drivers/misc/pti.c
+++ b/drivers/misc/pti.c
@@ -165,6 +165,11 @@ 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;
@@ -172,13 +177,6 @@ static void pti_control_frame_built_and_sent(struct pti_masterchannel *mc,
         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