[PATCH 06/11] coresight-etm: Fix initial trace ID value
mathieu.poirier at linaro.org
mathieu.poirier at linaro.org
Fri Jan 9 15:57:17 PST 2015
From: Mathieu Poirier <mathieu.poirier at linaro.org>
The coresight TRM specify that a component's trace ID should
be other than 0.
Signed-off-by: Mathieu Poirier <mathieu.poirier at linaro.org>
---
drivers/coresight/coresight-etm3x.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/coresight/coresight-etm3x.c b/drivers/coresight/coresight-etm3x.c
index 369cac00afaa..73c36696f1b6 100644
--- a/drivers/coresight/coresight-etm3x.c
+++ b/drivers/coresight/coresight-etm3x.c
@@ -1749,7 +1749,11 @@ static void etm_init_arch_data(void *info)
static void etm_init_default_data(struct etm_drvdata *drvdata)
{
- static int etm3x_traceid;
+ /*
+ * A trace ID of value 0 is invalid, so let's start at some
+ * random value that fits in 7 bits and will be just as good.
+ */
+ static int etm3x_traceid = 0x10;
u32 flags = (1 << 0 | /* instruction execute*/
3 << 3 | /* ARM instruction */
--
1.9.1
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