[PATCH 02/25] coresight: dynamic-replicator: Clean up error handling

Suzuki K Poulose
2019-03-20T18:50:17Z

We fail to disable the clock in case of a failure during the
probe. Clean this up. Also, we are supposed to drop the pm reference
only when the probing is successful.

Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
---
.../coresight/coresight-dynamic-replicator.c | 24 ++++++++++++++--------
1 file changed, 16 insertions(+), 8 deletions(-)

diff --git a/drivers/hwtracing/coresight/coresight-dynamic-replicator.c b/drivers/hwtracing/coresight/coresight-dynamic-replicator.c
index 299667b..fe176b9 100644
--- a/drivers/hwtracing/coresight/coresight-dynamic-replicator.c
+++ b/drivers/hwtracing/coresight/coresight-dynamic-replicator.c
@@ -150,7 +150,7 @@ static const struct attribute_group *replicator_groups[] = {

static int replicator_probe(struct amba_device *adev, const struct amba_id *id)
{
- int ret;
+ int ret = 0;
struct device *dev = &adev->dev;
struct resource *res = &adev->res;
struct coresight_platform_data *pdata = NULL;
@@ -180,12 +180,13 @@ static int replicator_probe(struct amba_device *adev, const struct amba_id *id)

/* Validity for the resource is already checked by the AMBA core */
base = devm_ioremap_resource(dev, res);
- if (IS_ERR(base))
- return PTR_ERR(base);
+ if (IS_ERR(base)) {
+ ret = PTR_ERR(base);
+ goto out_disable_clk;
+ }

drvdata->base = base;
dev_set_drvdata(dev, drvdata);
- pm_runtime_put(&adev->dev);

desc.type = CORESIGHT_DEV_TYPE_LINK;
desc.subtype.link_subtype = CORESIGHT_DEV_SUBTYPE_LINK_SPLIT;
@@ -195,11 +196,18 @@ static int replicator_probe(struct amba_device *adev, const struct amba_id *id)
desc.groups = replicator_groups;
drvdata->csdev = coresight_register(&desc);

- if (!IS_ERR(drvdata->csdev)) {
- replicator_reset(drvdata);
- return 0;
+ if (IS_ERR(drvdata->csdev)) {
+ ret = PTR_ERR(drvdata->csdev);
+ goto out_disable_clk;
}
- return PTR_ERR(drvdata->csdev);
+
+ replicator_reset(drvdata);
+ pm_runtime_put(&adev->dev);
+
+out_disable_clk:
+ if (ret && !IS_ERR_OR_NULL(drvdata->atclk))
+ clk_disable_unprepare(drvdata->atclk);
+ return ret;
}

#ifdef CONFIG_PM
--
2.7.4