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[Qemu-devel] [PATCH v2] hw/timer/grlib_gptimer: Avoid integer overflows
From: |
Sebastian Huber |
Subject: |
[Qemu-devel] [PATCH v2] hw/timer/grlib_gptimer: Avoid integer overflows |
Date: |
Sun, 16 Feb 2014 12:12:38 +0100 |
The GPTIMER uses 32-bit registers. Use a 64-bit operation to get the
ptimer count, otherwise we end up with a count of 0 for GPTIMER counter
values of 0xffffffff.
Use the GPTIMER counter value for tracing to avoid an overflow of the
32-bit value passed to trace_grlib_gptimer_enable().
Reviewed-by: Fabien Chouteau <address@hidden>
Signed-off-by: Sebastian Huber <address@hidden>
---
hw/timer/grlib_gptimer.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/hw/timer/grlib_gptimer.c b/hw/timer/grlib_gptimer.c
index 74c16d6..7672d3a 100644
--- a/hw/timer/grlib_gptimer.c
+++ b/hw/timer/grlib_gptimer.c
@@ -106,9 +106,9 @@ static void grlib_gptimer_enable(GPTimer *timer)
/* ptimer is triggered when the counter reach 0 but GPTimer is triggered at
underflow. Set count + 1 to simulate the GPTimer behavior. */
- trace_grlib_gptimer_enable(timer->id, timer->counter + 1);
+ trace_grlib_gptimer_enable(timer->id, timer->counter);
- ptimer_set_count(timer->ptimer, timer->counter + 1);
+ ptimer_set_count(timer->ptimer, (uint64_t)timer->counter + 1);
ptimer_run(timer->ptimer, 1);
}
--
1.8.1.4
- [Qemu-devel] [PATCH v2] hw/timer/grlib_gptimer: Avoid integer overflows,
Sebastian Huber <=