* [PATCH v1 1/1] ACPI: property: Get rid of redundant 'else'
@ 2022-02-09 14:53 Andy Shevchenko
2022-02-18 19:51 ` Rafael J. Wysocki
0 siblings, 1 reply; 2+ messages in thread
From: Andy Shevchenko @ 2022-02-09 14:53 UTC (permalink / raw)
To: Andy Shevchenko, Rafael J. Wysocki, linux-acpi, linux-kernel
Cc: Rafael J. Wysocki, Len Brown
In the snippets like the following
if (...)
return / goto / break / continue ...;
else
...
the 'else' is redundant. Get rid of it.
While at it, replace conditional '<= 0' for unsigned type by '== 0'
in acpi_data_prop_read(); update comment in the
__acpi_node_get_property_reference() on how we parse the reference.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
drivers/acpi/property.c | 27 +++++++++++++++------------
1 file changed, 15 insertions(+), 12 deletions(-)
diff --git a/drivers/acpi/property.c b/drivers/acpi/property.c
index 4744c191acee..928aa4f86344 100644
--- a/drivers/acpi/property.c
+++ b/drivers/acpi/property.c
@@ -541,7 +541,8 @@ acpi_device_data_of_node(const struct fwnode_handle *fwnode)
if (is_acpi_device_node(fwnode)) {
const struct acpi_device *adev = to_acpi_device_node(fwnode);
return &adev->data;
- } else if (is_acpi_data_node(fwnode)) {
+ }
+ if (is_acpi_data_node(fwnode)) {
const struct acpi_data_node *dn = to_acpi_data_node(fwnode);
return &dn->data;
}
@@ -739,14 +740,19 @@ int __acpi_node_get_property_reference(const struct fwnode_handle *fwnode,
return -EINVAL;
}
- /* assume following integer elements are all args */
+ /*
+ * Assume the following integer elements are all args.
+ * Stop counting on the first reference or end of the
+ * package arguments. In case of neither reference,
+ * nor integer, return an error, we can't parse it.
+ */
for (i = 0; element + i < end && i < num_args; i++) {
int type = element[i].type;
+ if (type == ACPI_TYPE_LOCAL_REFERENCE)
+ break;
if (type == ACPI_TYPE_INTEGER)
nargs++;
- else if (type == ACPI_TYPE_LOCAL_REFERENCE)
- break;
else
return -EINVAL;
}
@@ -938,7 +944,7 @@ static int acpi_data_prop_read(const struct acpi_device_data *data,
if (proptype != DEV_PROP_STRING && nval > obj->package.count)
return -EOVERFLOW;
- else if (nval <= 0)
+ if (nval == 0)
return -EINVAL;
items = obj->package.elements;
@@ -1000,14 +1006,10 @@ struct fwnode_handle *acpi_get_next_subnode(const struct fwnode_handle *fwnode,
const struct list_head *head;
struct list_head *next;
- if (!child || is_acpi_device_node(child)) {
+ if ((!child || is_acpi_device_node(child)) && adev) {
struct acpi_device *child_adev;
- if (adev)
- head = &adev->children;
- else
- goto nondev;
-
+ head = &adev->children;
if (list_empty(head))
goto nondev;
@@ -1077,7 +1079,8 @@ acpi_node_get_parent(const struct fwnode_handle *fwnode)
if (is_acpi_data_node(fwnode)) {
/* All data nodes have parent pointer so just return that */
return to_acpi_data_node(fwnode)->parent;
- } else if (is_acpi_device_node(fwnode)) {
+ }
+ if (is_acpi_device_node(fwnode)) {
struct device *dev = to_acpi_device_node(fwnode)->dev.parent;
if (dev)
--
2.34.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH v1 1/1] ACPI: property: Get rid of redundant 'else'
2022-02-09 14:53 [PATCH v1 1/1] ACPI: property: Get rid of redundant 'else' Andy Shevchenko
@ 2022-02-18 19:51 ` Rafael J. Wysocki
0 siblings, 0 replies; 2+ messages in thread
From: Rafael J. Wysocki @ 2022-02-18 19:51 UTC (permalink / raw)
To: Andy Shevchenko
Cc: Rafael J. Wysocki, ACPI Devel Maling List,
Linux Kernel Mailing List, Rafael J. Wysocki, Len Brown
On Wed, Feb 9, 2022 at 3:53 PM Andy Shevchenko
<andriy.shevchenko@linux.intel.com> wrote:
>
> In the snippets like the following
>
> if (...)
> return / goto / break / continue ...;
> else
> ...
>
> the 'else' is redundant. Get rid of it.
>
> While at it, replace conditional '<= 0' for unsigned type by '== 0'
> in acpi_data_prop_read(); update comment in the
> __acpi_node_get_property_reference() on how we parse the reference.
>
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
> ---
> drivers/acpi/property.c | 27 +++++++++++++++------------
> 1 file changed, 15 insertions(+), 12 deletions(-)
>
> diff --git a/drivers/acpi/property.c b/drivers/acpi/property.c
> index 4744c191acee..928aa4f86344 100644
> --- a/drivers/acpi/property.c
> +++ b/drivers/acpi/property.c
> @@ -541,7 +541,8 @@ acpi_device_data_of_node(const struct fwnode_handle *fwnode)
> if (is_acpi_device_node(fwnode)) {
> const struct acpi_device *adev = to_acpi_device_node(fwnode);
> return &adev->data;
> - } else if (is_acpi_data_node(fwnode)) {
> + }
> + if (is_acpi_data_node(fwnode)) {
> const struct acpi_data_node *dn = to_acpi_data_node(fwnode);
> return &dn->data;
> }
> @@ -739,14 +740,19 @@ int __acpi_node_get_property_reference(const struct fwnode_handle *fwnode,
> return -EINVAL;
> }
>
> - /* assume following integer elements are all args */
> + /*
> + * Assume the following integer elements are all args.
> + * Stop counting on the first reference or end of the
> + * package arguments. In case of neither reference,
> + * nor integer, return an error, we can't parse it.
> + */
> for (i = 0; element + i < end && i < num_args; i++) {
> int type = element[i].type;
>
> + if (type == ACPI_TYPE_LOCAL_REFERENCE)
> + break;
> if (type == ACPI_TYPE_INTEGER)
> nargs++;
> - else if (type == ACPI_TYPE_LOCAL_REFERENCE)
> - break;
> else
> return -EINVAL;
> }
> @@ -938,7 +944,7 @@ static int acpi_data_prop_read(const struct acpi_device_data *data,
>
> if (proptype != DEV_PROP_STRING && nval > obj->package.count)
> return -EOVERFLOW;
> - else if (nval <= 0)
> + if (nval == 0)
> return -EINVAL;
>
> items = obj->package.elements;
> @@ -1000,14 +1006,10 @@ struct fwnode_handle *acpi_get_next_subnode(const struct fwnode_handle *fwnode,
> const struct list_head *head;
> struct list_head *next;
>
> - if (!child || is_acpi_device_node(child)) {
> + if ((!child || is_acpi_device_node(child)) && adev) {
> struct acpi_device *child_adev;
>
> - if (adev)
> - head = &adev->children;
> - else
> - goto nondev;
> -
> + head = &adev->children;
> if (list_empty(head))
> goto nondev;
>
> @@ -1077,7 +1079,8 @@ acpi_node_get_parent(const struct fwnode_handle *fwnode)
> if (is_acpi_data_node(fwnode)) {
> /* All data nodes have parent pointer so just return that */
> return to_acpi_data_node(fwnode)->parent;
> - } else if (is_acpi_device_node(fwnode)) {
> + }
> + if (is_acpi_device_node(fwnode)) {
> struct device *dev = to_acpi_device_node(fwnode)->dev.parent;
>
> if (dev)
> --
Applied as 5.18 material, thanks!
^ permalink raw reply [flat|nested] 2+ messages in thread
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2022-02-18 19:51 ` Rafael J. Wysocki
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