sparc32, sun4d: add comment in empty statement in sun4d_request_irq()

This looked like a bug to me.
Add a comment so next reader is hopefully less confused.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 1 deletions

diff --git a/arch/sparc/kernel/sun4d_irq.c b/arch/sparc/kernel/sun4d_irq.c
index b2e3fbf7c6fa..609a13c85823 100644
--- a/arch/sparc/kernel/sun4d_irq.c
+++ b/arch/sparc/kernel/sun4d_irq.c
@@ -307,7 +307,8 @@ int sun4d_request_irq(unsigned int irq,
 
         if (action) {
                 if ((action->flags & IRQF_SHARED) && (irqflags & IRQF_SHARED)) {
-                        for (tmp = action; tmp->next; tmp = tmp->next);
+                        for (tmp = action; tmp->next; tmp = tmp->next)
+                                /* find last entry - tmp used below */;
                 } else {
                         ret = -EBUSY;
                         goto out_unlock;