[PATCH 1/1 v2] ARM: coresight: fix system halt when etm enable and add nosmp to command line
Frank.Li at freescale.com
Frank.Li at freescale.com
Thu Feb 19 05:57:55 PST 2015
From: Frank Li <Frank.Li at freescale.com>
when nosmp set, only 1 core enabled. try to access disable core will halt.
dts need added arm,primecell-periphid = <id> for none-boot core
otherwise amba_device_add will halt when read peripheral id.
Signed-off-by: Frank Li <Frank.Li at freescale.com>
---
Change from v1 to v2
- fixed typo
drivers/coresight/coresight-etm3x.c | 4 ++++
drivers/coresight/of_coresight.c | 3 +--
2 files changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/coresight/coresight-etm3x.c b/drivers/coresight/coresight-etm3x.c
index 73c3669..d312952 100644
--- a/drivers/coresight/coresight-etm3x.c
+++ b/drivers/coresight/coresight-etm3x.c
@@ -1829,6 +1829,10 @@ static int etm_probe(struct amba_device *adev, const struct amba_id *id)
return ret;
drvdata->cpu = pdata ? pdata->cpu : 0;
+ if (drvdata->cpu < 0) {
+ ret = -EINVAL;
+ goto err_arch_supported;
+ }
get_online_cpus();
etmdrvdata[drvdata->cpu] = drvdata;
diff --git a/drivers/coresight/of_coresight.c b/drivers/coresight/of_coresight.c
index c3efa41..6804bbd 100644
--- a/drivers/coresight/of_coresight.c
+++ b/drivers/coresight/of_coresight.c
@@ -196,8 +196,7 @@ struct coresight_platform_data *of_get_coresight_platform_data(
if (cell) {
hwid = of_read_number(cell, of_n_addr_cells(dn));
index = get_logical_index(hwid);
- if (index != -EINVAL)
- pdata->cpu = index;
+ pdata->cpu = index;
}
}
--
1.9.1
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