[PATCH] hwmon/sch5627: Use common error handling code in sch5627_probe()

From: SF Markus Elfring
Date: Mon Mar 12 2018 - 17:24:31 EST


From: Markus Elfring <elfring@xxxxxxxxxxxxxxxxxxxxx>
Date: Mon, 12 Mar 2018 22:15:59 +0100

Adjust jump targets so that a bit of exception handling can be better
reused at the end of this function.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@xxxxxxxxxxxxxxxxxxxxx>
---
drivers/hwmon/sch5627.c | 60 ++++++++++++++++++++++++-------------------------
1 file changed, 29 insertions(+), 31 deletions(-)

diff --git a/drivers/hwmon/sch5627.c b/drivers/hwmon/sch5627.c
index 91544f2312e6..e7a2a974ab74 100644
--- a/drivers/hwmon/sch5627.c
+++ b/drivers/hwmon/sch5627.c
@@ -480,72 +480,64 @@ static int sch5627_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, data);

val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_HWMON_ID);
- if (val < 0) {
- err = val;
- goto error;
- }
+ if (val < 0)
+ goto set_error_code;
+
if (val != SCH5627_HWMON_ID) {
pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "hwmon",
val, SCH5627_HWMON_ID);
- err = -ENODEV;
- goto error;
+ goto e_nodev;
}

val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_COMPANY_ID);
- if (val < 0) {
- err = val;
- goto error;
- }
+ if (val < 0)
+ goto set_error_code;
+
if (val != SCH5627_COMPANY_ID) {
pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "company",
val, SCH5627_COMPANY_ID);
- err = -ENODEV;
- goto error;
+ goto e_nodev;
}

val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_PRIMARY_ID);
- if (val < 0) {
- err = val;
- goto error;
- }
+ if (val < 0)
+ goto set_error_code;
+
if (val != SCH5627_PRIMARY_ID) {
pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "primary",
val, SCH5627_PRIMARY_ID);
- err = -ENODEV;
- goto error;
+ goto e_nodev;
}

build_code = sch56xx_read_virtual_reg(data->addr,
SCH5627_REG_BUILD_CODE);
if (build_code < 0) {
err = build_code;
- goto error;
+ goto remove_device;
}

build_id = sch56xx_read_virtual_reg16(data->addr,
SCH5627_REG_BUILD_ID);
if (build_id < 0) {
err = build_id;
- goto error;
+ goto remove_device;
}

hwmon_rev = sch56xx_read_virtual_reg(data->addr,
SCH5627_REG_HWMON_REV);
if (hwmon_rev < 0) {
err = hwmon_rev;
- goto error;
+ goto remove_device;
}

val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_CTRL);
- if (val < 0) {
- err = val;
- goto error;
- }
+ if (val < 0)
+ goto set_error_code;
+
data->control = val;
if (!(data->control & 0x01)) {
pr_err("hardware monitoring not enabled\n");
- err = -ENODEV;
- goto error;
+ goto e_nodev;
}
/* Trigger a Vbat voltage measurement, so that we get a valid reading
the first time we read Vbat */
@@ -559,7 +551,7 @@ static int sch5627_probe(struct platform_device *pdev)
*/
err = sch5627_read_limits(data);
if (err)
- goto error;
+ goto remove_device;

pr_info("found %s chip at %#hx\n", DEVNAME, data->addr);
pr_info("firmware build: code 0x%02X, id 0x%04X, hwmon: rev 0x%02X\n",
@@ -568,13 +560,13 @@ static int sch5627_probe(struct platform_device *pdev)
/* Register sysfs interface files */
err = sysfs_create_group(&pdev->dev.kobj, &sch5627_group);
if (err)
- goto error;
+ goto remove_device;

data->hwmon_dev = hwmon_device_register(&pdev->dev);
if (IS_ERR(data->hwmon_dev)) {
err = PTR_ERR(data->hwmon_dev);
data->hwmon_dev = NULL;
- goto error;
+ goto remove_device;
}

/* Note failing to register the watchdog is not a fatal error */
@@ -584,7 +576,13 @@ static int sch5627_probe(struct platform_device *pdev)

return 0;

-error:
+set_error_code:
+ err = val;
+ goto remove_device;
+
+e_nodev:
+ err = -ENODEV;
+remove_device:
sch5627_remove(pdev);
return err;
}
--
2.16.2