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thermal/qcom/tsens-common : fix possible object reference leak 

of_find_device_by_node() takes a reference to the struct device
when it finds a match via get_device.
We also should make sure to drop the reference to the device
taken by of_find_device_by_node() when returning error.

Signed-off-by: Peng Hao <peng.hao2@zte.com.cn>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
This commit is contained in:
Peng Hao 2019-02-13 22:53:29 +08:00 committed by Eduardo Valentin
parent 76b1ae8698
commit a245b62be3
1 changed files with 23 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

33
drivers/thermal/qcom/tsens-common.c
View File

@ -144,13 +144,17 @@ int __init init_common(struct tsens_device *tmdev)
tmdev->tm_offset = 0;
res = platform_get_resource(op, IORESOURCE_MEM, 1);
srot_base = devm_ioremap_resource(&op->dev, res);
if (IS_ERR(srot_base))
return PTR_ERR(srot_base);
if (IS_ERR(srot_base)) {
ret = PTR_ERR(srot_base);
goto err_put_device;
}
tmdev->srot_map = devm_regmap_init_mmio(tmdev->dev, srot_base,
&tsens_srot_config);
if (IS_ERR(tmdev->srot_map))
return PTR_ERR(tmdev->srot_map);
if (IS_ERR(tmdev->srot_map)) {
ret = PTR_ERR(tmdev->srot_map);
goto err_put_device;
}
} else {
/* old DTs where SROT and TM were in a contiguous 2K block */
@ -159,22 +163,31 @@ int __init init_common(struct tsens_device *tmdev)
res = platform_get_resource(op, IORESOURCE_MEM, 0);
tm_base = devm_ioremap_resource(&op->dev, res);
if (IS_ERR(tm_base))
return PTR_ERR(tm_base);
if (IS_ERR(tm_base)) {
ret = PTR_ERR(tm_base);
goto err_put_device;
}
tmdev->tm_map = devm_regmap_init_mmio(tmdev->dev, tm_base, &tsens_config);
if (IS_ERR(tmdev->tm_map))
return PTR_ERR(tmdev->tm_map);
if (IS_ERR(tmdev->tm_map)) {
ret = PTR_ERR(tmdev->tm_map);
goto err_put_device;
}
if (tmdev->srot_map) {
ret = regmap_read(tmdev->srot_map, ctrl_offset, &code);
if (ret)
return ret;
goto err_put_device;
if (!(code & TSENS_EN)) {
dev_err(tmdev->dev, "tsens device is not enabled\n");
return -ENODEV;
ret = -ENODEV;
goto err_put_device;
}
}
return 0;
err_put_device:
put_device(&op->dev);
return ret;
}