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SubjectRe: [PATCH v3 07/10] lib/vsprintf: Make use of fwnode API to obtain node names and separators
On Thu, Aug 29, 2019 at 01:10:40PM +0300, Sakari Ailus wrote:
> Instead of implementing our own means of discovering parent nodes, node
> names or counting how many parents a node has, use the newly added
> functions in the fwnode API to obtain that information.
>

Some style comments below.
Nevertheless,
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

> Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
> ---
> lib/vsprintf.c | 38 ++++++++++++++++----------------------
> 1 file changed, 16 insertions(+), 22 deletions(-)
>
> diff --git a/lib/vsprintf.c b/lib/vsprintf.c
> index b00b57f9f911f..a04a2167101ef 100644
> --- a/lib/vsprintf.c
> +++ b/lib/vsprintf.c
> @@ -38,6 +38,7 @@
> #include <net/addrconf.h>
> #include <linux/siphash.h>
> #include <linux/compiler.h>
> +#include <linux/property.h>
> #ifdef CONFIG_BLOCK
> #include <linux/blkdev.h>
> #endif
> @@ -1863,32 +1864,24 @@ char *flags_string(char *buf, char *end, void *flags_ptr,
> return format_flags(buf, end, flags, names);
> }
>
> -static const char *device_node_name_for_depth(const struct device_node *np, int depth)
> -{
> - for ( ; np && depth; depth--)
> - np = np->parent;
> -
> - return kbasename(np->full_name);
> -}
> -
> static noinline_for_stack
> -char *device_node_gen_full_name(const struct device_node *np, char *buf, char *end)

> +char *fwnode_full_name_string(struct fwnode_handle *fwnode, char *buf,
> + char *end)

I would leave it on one line.

> {
> int depth;
> - const struct device_node *parent = np->parent;
>
> - /* special case for root node */
> - if (!parent)
> - return string_nocheck(buf, end, "/", default_str_spec);
> + for (depth = fwnode_count_parents(fwnode); depth >= 0; depth--) {
> + struct fwnode_handle *__fwnode =
> + fwnode_get_nth_parent(fwnode, depth);

Ditto if you name temporary variable like fw / fh / fn / etc.

>
> - for (depth = 0; parent->parent; depth++)
> - parent = parent->parent;
> -
> - for ( ; depth >= 0; depth--) {
> - buf = string_nocheck(buf, end, "/", default_str_spec);
> - buf = string(buf, end, device_node_name_for_depth(np, depth),

> + buf = string(buf, end, fwnode_get_name_prefix(__fwnode),
> + default_str_spec);
> + buf = string(buf, end, fwnode_get_name(__fwnode),
> default_str_spec);

Ditto.

> +
> + fwnode_handle_put(__fwnode);
> }
> +
> return buf;
> }
>
> @@ -1933,10 +1926,11 @@ char *device_node_string(char *buf, char *end, struct device_node *dn,
>
> switch (*fmt) {
> case 'f': /* full_name */
> - buf = device_node_gen_full_name(dn, buf, end);

> + buf = fwnode_full_name_string(of_fwnode_handle(dn), buf,
> + end);

Ditto, disregard checkpatch.

> break;
> case 'n': /* name */
> - p = kbasename(of_node_full_name(dn));
> + p = fwnode_get_name(of_fwnode_handle(dn));
> precision = str_spec.precision;
> str_spec.precision = strchrnul(p, '@') - p;
> buf = string(buf, end, p, str_spec);
> @@ -1946,7 +1940,7 @@ char *device_node_string(char *buf, char *end, struct device_node *dn,
> buf = number(buf, end, (unsigned int)dn->phandle, num_spec);
> break;
> case 'P': /* path-spec */
> - p = kbasename(of_node_full_name(dn));
> + p = fwnode_get_name(of_fwnode_handle(dn));
> if (!p[1])
> p = "/";
> buf = string(buf, end, p, str_spec);
> --
> 2.20.1
>

--
With Best Regards,
Andy Shevchenko


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