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authorSuzuki K Poulose <suzuki.poulose@arm.com>2018-09-20 13:18:09 -0600
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-09-25 20:09:18 +0200
commit62563e84a8c9c682e07b8cce8678e583a24be504 (patch)
treee2e0ba55e89a87e928bcf4af31b6a1831d7cde64 /drivers/hwtracing
parente2a1551a881f27d1914f182e06b423cc242b43b6 (diff)
downloadlinux-62563e84a8c9c682e07b8cce8678e583a24be504.tar.bz2
coresight: etb10: Handle errors enabling the device
Prepare the etb10 driver to return errors in enabling the device. Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/hwtracing')
-rw-r--r--drivers/hwtracing/coresight/coresight-etb10.c18
1 files changed, 13 insertions, 5 deletions
diff --git a/drivers/hwtracing/coresight/coresight-etb10.c b/drivers/hwtracing/coresight/coresight-etb10.c
index 08fa660098f8..824be0c5f592 100644
--- a/drivers/hwtracing/coresight/coresight-etb10.c
+++ b/drivers/hwtracing/coresight/coresight-etb10.c
@@ -106,7 +106,7 @@ static unsigned int etb_get_buffer_depth(struct etb_drvdata *drvdata)
return depth;
}
-static void etb_enable_hw(struct etb_drvdata *drvdata)
+static void __etb_enable_hw(struct etb_drvdata *drvdata)
{
int i;
u32 depth;
@@ -134,6 +134,12 @@ static void etb_enable_hw(struct etb_drvdata *drvdata)
CS_LOCK(drvdata->base);
}
+static int etb_enable_hw(struct etb_drvdata *drvdata)
+{
+ __etb_enable_hw(drvdata);
+ return 0;
+}
+
static int etb_enable_sysfs(struct coresight_device *csdev)
{
int ret = 0;
@@ -152,8 +158,9 @@ static int etb_enable_sysfs(struct coresight_device *csdev)
if (drvdata->mode == CS_MODE_SYSFS)
goto out;
- drvdata->mode = CS_MODE_SYSFS;
- etb_enable_hw(drvdata);
+ ret = etb_enable_hw(drvdata);
+ if (!ret)
+ drvdata->mode = CS_MODE_SYSFS;
out:
spin_unlock_irqrestore(&drvdata->spinlock, flags);
@@ -183,8 +190,9 @@ static int etb_enable_perf(struct coresight_device *csdev, void *data)
if (ret)
goto out;
- drvdata->mode = CS_MODE_PERF;
- etb_enable_hw(drvdata);
+ ret = etb_enable_hw(drvdata);
+ if (!ret)
+ drvdata->mode = CS_MODE_PERF;
out:
spin_unlock_irqrestore(&drvdata->spinlock, flags);