arm_mpam: resctrl: Fix the check for no monitor components found

Dan Carpenter reports that, in mpam_resctrl_alloc_domain(), any_mon_comp is
used in an 'if' condition when it may be uninitialized. Initialize it to
NULL so that the check behaves correctly when no monitor components are
found.

Reported-by: Dan Carpenter <[email protected]>
Fixes: 264c285 ("arm_mpam: resctrl: Add monitor initialisation and domain boilerplate")
Signed-off-by: Ben Horgan <[email protected]>
Reviewed-by: Gavin Shan <[email protected]>
Signed-off-by: James Morse <[email protected]>

Author: benhor01

drivers/resctrl/mpam_resctrl.c

@@ -1407,7 +1407,7 @@ mpam_resctrl_alloc_domain(unsigned int cpu, struct mpam_resctrl_res *res)
 	}
 
 	if (r->mon_capable) {
-		struct mpam_component *any_mon_comp;
+		struct mpam_component *any_mon_comp = NULL;
 		struct mpam_resctrl_mon *mon;
 		enum resctrl_event_id eventid;