[PATCH] ACPI: debug: Clean up acpi_aml_init()

[PATCH] ACPI: debug: Clean up acpi_aml_init()

[Rafael J. Wysocki]

From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

The err_exit label in acpi_aml_init() is not used any more after
commit 9ec6dbfbdc0a ("ACPI: no need to check return value of
debugfs_create functions"), but the other label in there is not
necessary too, so rearrange the code to get rid of them both.

No intentional functional impact.

Fixes: 9ec6dbfbdc0a ("ACPI: no need to check return value of debugfs_create functions")
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/acpi/acpi_dbg.c |   15 +++++++--------
 1 file changed, 7 insertions(+), 8 deletions(-)

Index: linux-pm/drivers/acpi/acpi_dbg.c
===================================================================
--- linux-pm.orig/drivers/acpi/acpi_dbg.c
+++ linux-pm/drivers/acpi/acpi_dbg.c
@@ -750,29 +750,28 @@ static const struct acpi_debugger_ops ac
 
 int __init acpi_aml_init(void)
 {
-	int ret = 0;
+	int ret;
 
 	/* Initialize AML IO interface */
 	mutex_init(&acpi_aml_io.lock);
 	init_waitqueue_head(&acpi_aml_io.wait);
 	acpi_aml_io.out_crc.buf = acpi_aml_io.out_buf;
 	acpi_aml_io.in_crc.buf = acpi_aml_io.in_buf;
+
 	acpi_aml_dentry = debugfs_create_file("acpidbg",
 					      S_IFREG | S_IRUGO | S_IWUSR,
 					      acpi_debugfs_dir, NULL,
 					      &acpi_aml_operations);
-	ret = acpi_register_debugger(THIS_MODULE, &acpi_aml_debugger);
-	if (ret)
-		goto err_fs;
-	acpi_aml_initialized = true;
 
-err_fs:
+	ret = acpi_register_debugger(THIS_MODULE, &acpi_aml_debugger);
 	if (ret) {
 		debugfs_remove(acpi_aml_dentry);
 		acpi_aml_dentry = NULL;
+		return ret;
 	}
-err_exit:
-	return ret;
+
+	acpi_aml_initialized = true;
+	return 0;
 }
 
 void __exit acpi_aml_exit(void)

Re: [PATCH] ACPI: debug: Clean up acpi_aml_init()

[Greg Kroah-Hartman]

On Thu, Jan 24, 2019 at 11:25:59AM +0100, Rafael J. Wysocki wrote:
> From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
> 
> The err_exit label in acpi_aml_init() is not used any more after
> commit 9ec6dbfbdc0a ("ACPI: no need to check return value of
> debugfs_create functions"), but the other label in there is not
> necessary too, so rearrange the code to get rid of them both.
> 
> No intentional functional impact.
> 
> Fixes: 9ec6dbfbdc0a ("ACPI: no need to check return value of debugfs_create functions")
> Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
> ---
>  drivers/acpi/acpi_dbg.c |   15 +++++++--------
>  1 file changed, 7 insertions(+), 8 deletions(-)
> 
> Index: linux-pm/drivers/acpi/acpi_dbg.c
> ===================================================================
> --- linux-pm.orig/drivers/acpi/acpi_dbg.c
> +++ linux-pm/drivers/acpi/acpi_dbg.c
> @@ -750,29 +750,28 @@ static const struct acpi_debugger_ops ac
>  
>  int __init acpi_aml_init(void)
>  {
> -	int ret = 0;
> +	int ret;
>  
>  	/* Initialize AML IO interface */
>  	mutex_init(&acpi_aml_io.lock);
>  	init_waitqueue_head(&acpi_aml_io.wait);
>  	acpi_aml_io.out_crc.buf = acpi_aml_io.out_buf;
>  	acpi_aml_io.in_crc.buf = acpi_aml_io.in_buf;
> +
>  	acpi_aml_dentry = debugfs_create_file("acpidbg",
>  					      S_IFREG | S_IRUGO | S_IWUSR,
>  					      acpi_debugfs_dir, NULL,
>  					      &acpi_aml_operations);
> -	ret = acpi_register_debugger(THIS_MODULE, &acpi_aml_debugger);
> -	if (ret)
> -		goto err_fs;
> -	acpi_aml_initialized = true;
>  
> -err_fs:
> +	ret = acpi_register_debugger(THIS_MODULE, &acpi_aml_debugger);
>  	if (ret) {
>  		debugfs_remove(acpi_aml_dentry);
>  		acpi_aml_dentry = NULL;
> +		return ret;
>  	}
> -err_exit:
> -	return ret;
> +
> +	acpi_aml_initialized = true;
> +	return 0;
>  }
>  

Odd that 0-day never reported this :(

Sorry about it, and thanks for the patch:

Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>