git.openwrt.org Git - openwrt/staging/xback.git/blob

   1 From e6506f06d5e82765666902ccf9e9162f3e31d518 Mon Sep 17 00:00:00 2001
   2 From: Miquel Raynal <miquel.raynal@bootlin.com>
   3 Date: Tue, 4 Apr 2023 18:21:18 +0100
   4 Subject: [PATCH] of: Move the request module helper logic to module.c
   5
   6 Depending on device.c for pure OF handling is considered
   7 backwards. Let's extract the content of of_device_request_module() to
   8 have the real logic under module.c.
   9
  10 The next step will be to convert users of of_device_request_module() to
  11 use the new helper.
  12
  13 Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
  14 Reviewed-by: Rob Herring <robh@kernel.org>
  15 Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
  16 Link: https://lore.kernel.org/r/20230404172148.82422-11-srinivas.kandagatla@linaro.org
  17 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  18 ---
  19  drivers/of/device.c | 25 ++-----------------------
  20  drivers/of/module.c | 30 ++++++++++++++++++++++++++++++
  21  include/linux/of.h  |  6 ++++++
  22  3 files changed, 38 insertions(+), 23 deletions(-)
  23
  24 --- a/drivers/of/device.c
  25 +++ b/drivers/of/device.c
  26 @@ -7,7 +7,6 @@
  27  #include <linux/dma-direct.h> /* for bus_dma_region */
  28  #include <linux/dma-map-ops.h>
  29  #include <linux/init.h>
  30 -#include <linux/module.h>
  31  #include <linux/mod_devicetable.h>
  32  #include <linux/slab.h>
  33  #include <linux/platform_device.h>
  34 @@ -216,30 +215,10 @@ EXPORT_SYMBOL(of_device_get_match_data);
  35
  36  int of_device_request_module(struct device *dev)
  37  {
  38 -       char *str;
  39 -       ssize_t size;
  40 -       int ret;
  41 -
  42 -       if (!dev || !dev->of_node)
  43 +       if (!dev)
  44                 return -ENODEV;
  45
  46 -       size = of_modalias(dev->of_node, NULL, 0);
  47 -       if (size < 0)
  48 -               return size;
  49 -
  50 -       /* Reserve an additional byte for the trailing '\0' */
  51 -       size++;
  52 -
  53 -       str = kmalloc(size, GFP_KERNEL);
  54 -       if (!str)
  55 -               return -ENOMEM;
  56 -
  57 -       of_modalias(dev->of_node, str, size);
  58 -       str[size - 1] = '\0';
  59 -       ret = request_module(str);
  60 -       kfree(str);
  61 -
  62 -       return ret;
  63 +       return of_request_module(dev->of_node);
  64  }
  65  EXPORT_SYMBOL_GPL(of_device_request_module);
  66
  67 --- a/drivers/of/module.c
  68 +++ b/drivers/of/module.c
  69 @@ -4,6 +4,7 @@
  70   */
  71
  72  #include <linux/of.h>
  73 +#include <linux/module.h>
  74  #include <linux/slab.h>
  75  #include <linux/string.h>
  76
  77 @@ -42,3 +43,32 @@ ssize_t of_modalias(const struct device_
  78
  79         return tsize;
  80  }
  81 +
  82 +int of_request_module(const struct device_node *np)
  83 +{
  84 +       char *str;
  85 +       ssize_t size;
  86 +       int ret;
  87 +
  88 +       if (!np)
  89 +               return -ENODEV;
  90 +
  91 +       size = of_modalias(np, NULL, 0);
  92 +       if (size < 0)
  93 +               return size;
  94 +
  95 +       /* Reserve an additional byte for the trailing '\0' */
  96 +       size++;
  97 +
  98 +       str = kmalloc(size, GFP_KERNEL);
  99 +       if (!str)
 100 +               return -ENOMEM;
 101 +
 102 +       of_modalias(np, str, size);
 103 +       str[size - 1] = '\0';
 104 +       ret = request_module(str);
 105 +       kfree(str);
 106 +
 107 +       return ret;
 108 +}
 109 +EXPORT_SYMBOL_GPL(of_request_module);
 110 --- a/include/linux/of.h
 111 +++ b/include/linux/of.h
 112 @@ -375,6 +375,7 @@ extern int of_count_phandle_with_args(co
 113
 114  /* module functions */
 115  extern ssize_t of_modalias(const struct device_node *np, char *str, ssize_t len);
 116 +extern int of_request_module(const struct device_node *np);
 117
 118  /* phandle iterator functions */
 119  extern int of_phandle_iterator_init(struct of_phandle_iterator *it,
 120 @@ -886,6 +887,11 @@ static inline ssize_t of_modalias(const
 121  {
 122         return -ENODEV;
 123  }
 124 +
 125 +static inline int of_request_module(const struct device_node *np)
 126 +{
 127 +       return -ENODEV;
 128 +}
 129
 130  static inline int of_phandle_iterator_init(struct of_phandle_iterator *it,
 131                                            const struct device_node *np,