ARM: 8165/1: alignment: don't break misaligned NEON load/store

[pandora-kernel.git] / kernel / hrtimer.c

diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c
index 60f7e32..20e88af 100644 (file)
--- a/kernel/hrtimer.c
+++ b/kernel/hrtimer.c
@@ -232,6 +232,11 @@ again:
                        goto again;
                }
                timer->base = new_base;
+       } else {
+               if (cpu != this_cpu && hrtimer_check_target(timer, new_base)) {
+                       cpu = this_cpu;
+                       goto again;
+               }
        }
        return new_base;
 }
@@ -567,6 +572,23 @@ hrtimer_force_reprogram(struct hrtimer_cpu_base *cpu_base, int skip_equal)
 
        cpu_base->expires_next.tv64 = expires_next.tv64;
 
+       /*
+        * If a hang was detected in the last timer interrupt then we
+        * leave the hang delay active in the hardware. We want the
+        * system to make progress. That also prevents the following
+        * scenario:
+        * T1 expires 50ms from now
+        * T2 expires 5s from now
+        *
+        * T1 is removed, so this code is called and would reprogram
+        * the hardware to 5s from now. Any hrtimer_start after that
+        * will not reprogram the hardware due to hang_detected being
+        * set. So we'd effectivly block all timers until the T2 event
+        * fires.
+        */
+       if (cpu_base->hang_detected)
+               return;
+
        if (cpu_base->expires_next.tv64 != KTIME_MAX)
                tick_program_event(cpu_base->expires_next, 1);
 }
@@ -958,11 +980,8 @@ int __hrtimer_start_range_ns(struct hrtimer *timer, ktime_t tim,
        /* Remove an active timer from the queue: */
        ret = remove_hrtimer(timer, base);
 
-       /* Switch the timer base, if necessary: */
-       new_base = switch_hrtimer_base(timer, base, mode & HRTIMER_MODE_PINNED);
-
        if (mode & HRTIMER_MODE_REL) {
-               tim = ktime_add_safe(tim, new_base->get_time());
+               tim = ktime_add_safe(tim, base->get_time());
                /*
                 * CONFIG_TIME_LOW_RES is a temporary way for architectures
                 * to signal that they simply return xtime in
@@ -977,6 +996,9 @@ int __hrtimer_start_range_ns(struct hrtimer *timer, ktime_t tim,
 
        hrtimer_set_expires_range_ns(timer, tim, delta_ns);
 
+       /* Switch the timer base, if necessary: */
+       new_base = switch_hrtimer_base(timer, base, mode & HRTIMER_MODE_PINNED);
+
        timer_stats_hrtimer_set_start_info(timer);
 
        leftmost = enqueue_hrtimer(timer, new_base);