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Subject[PATCH 4/5] soundwire: qcom: fix error handling in probe
Date
Make sure all error cases are properly handled and all resources freed.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
---
drivers/soundwire/qcom.c | 26 +++++++++++++++++---------
1 file changed, 17 insertions(+), 9 deletions(-)

diff --git a/drivers/soundwire/qcom.c b/drivers/soundwire/qcom.c
index 1c6c6a2e0def..77783ae4b71d 100644
--- a/drivers/soundwire/qcom.c
+++ b/drivers/soundwire/qcom.c
@@ -756,12 +756,16 @@ static int qcom_swrm_probe(struct platform_device *pdev)
}

ctrl->irq = of_irq_get(dev->of_node, 0);
- if (ctrl->irq < 0)
- return ctrl->irq;
+ if (ctrl->irq < 0) {
+ ret = ctrl->irq;
+ goto err_init;
+ }

ctrl->hclk = devm_clk_get(dev, "iface");
- if (IS_ERR(ctrl->hclk))
- return PTR_ERR(ctrl->hclk);
+ if (IS_ERR(ctrl->hclk)) {
+ ret = PTR_ERR(ctrl->hclk);
+ goto err_init;
+ }

clk_prepare_enable(ctrl->hclk);

@@ -778,7 +782,7 @@ static int qcom_swrm_probe(struct platform_device *pdev)

ret = qcom_swrm_get_port_config(ctrl);
if (ret)
- return ret;
+ goto err_clk;

params = &ctrl->bus.params;
params->max_dr_freq = DEFAULT_CLK_FREQ;
@@ -805,28 +809,32 @@ static int qcom_swrm_probe(struct platform_device *pdev)
"soundwire", ctrl);
if (ret) {
dev_err(dev, "Failed to request soundwire irq\n");
- goto err;
+ goto err_clk;
}

ret = sdw_add_bus_master(&ctrl->bus);
if (ret) {
dev_err(dev, "Failed to register Soundwire controller (%d)\n",
ret);
- goto err;
+ goto err_clk;
}

qcom_swrm_init(ctrl);
ret = qcom_swrm_register_dais(ctrl);
if (ret)
- goto err;
+ goto err_master_add;

dev_info(dev, "Qualcomm Soundwire controller v%x.%x.%x Registered\n",
(ctrl->version >> 24) & 0xff, (ctrl->version >> 16) & 0xff,
ctrl->version & 0xffff);

return 0;
-err:
+
+err_master_add:
+ sdw_delete_bus_master(&ctrl->bus);
+err_clk:
clk_disable_unprepare(ctrl->hclk);
+err_init:
return ret;
}

--
2.20.1
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