Re: [PATCH 2/3] PCI: of: create DT nodes for PCI devices if they do not exists

From: kernel test robot
Date: Wed Apr 27 2022 - 13:49:08 EST

Hi "Clément,

I love your patch! Yet something to improve:

[auto build test ERROR on helgaas-pci/next]
[also build test ERROR on v5.18-rc4 next-20220427]
[cannot apply to robh/for-next]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url: https://github.com/intel-lab-lkp/linux/commits/Cl-ment-L-ger/add-dynamic-PCI-device-of_node-creation-for-overlay/20220427-190828
base: https://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci.git next
config: sparc64-buildonly-randconfig-r003-20220427 (https://download.01.org/0day-ci/archive/20220428/202204280126.T5VOPZdN-lkp@xxxxxxxxx/config)
compiler: sparc64-linux-gcc (GCC) 11.3.0
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://github.com/intel-lab-lkp/linux/commit/787f8567f04db060522e198fbdc55a805e99b922
git remote add linux-review https://github.com/intel-lab-lkp/linux
git fetch --no-tags linux-review Cl-ment-L-ger/add-dynamic-PCI-device-of_node-creation-for-overlay/20220427-190828
git checkout 787f8567f04db060522e198fbdc55a805e99b922
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross W=1 O=build_dir ARCH=sparc64 SHELL=/bin/bash drivers/pci/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>

All errors (new ones prefixed by >>):

drivers/pci/of.c: In function 'of_pci_add_property':
>> drivers/pci/of.c:54:15: error: implicit declaration of function 'of_changeset_add_property'; did you mean 'of_pci_add_property'? [-Werror=implicit-function-declaration]
54 | ret = of_changeset_add_property(ocs, np, prop);
| ^~~~~~~~~~~~~~~~~~~~~~~~~
| of_pci_add_property
drivers/pci/of.c: In function 'of_pci_make_dev_node':
>> drivers/pci/of.c:129:9: error: implicit declaration of function 'of_changeset_init' [-Werror=implicit-function-declaration]
129 | of_changeset_init(&cs);
| ^~~~~~~~~~~~~~~~~
>> drivers/pci/of.c:147:15: error: implicit declaration of function 'of_changeset_attach_node' [-Werror=implicit-function-declaration]
147 | ret = of_changeset_attach_node(&cs, node);
| ^~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/pci/of.c:151:15: error: implicit declaration of function 'of_changeset_apply' [-Werror=implicit-function-declaration]
151 | ret = of_changeset_apply(&cs);
| ^~~~~~~~~~~~~~~~~~
>> drivers/pci/of.c:160:9: error: implicit declaration of function 'of_changeset_destroy' [-Werror=implicit-function-declaration]
160 | of_changeset_destroy(&cs);
| ^~~~~~~~~~~~~~~~~~~~
cc1: some warnings being treated as errors


vim +54 drivers/pci/of.c

17
18 #ifdef CONFIG_PCI
19 static int of_pci_add_property(struct of_changeset *ocs, struct device_node *np,
20 const char *name, const void *value, int length)
21 {
22 struct property *prop;
23 int ret = -ENOMEM;
24
25 prop = kzalloc(sizeof(*prop), GFP_KERNEL);
26 if (!prop)
27 return -ENOMEM;
28
29 prop->name = kstrdup(name, GFP_KERNEL);
30 if (!prop->name)
31 goto out_err;
32
33 if (value) {
34 prop->value = kmemdup(value, length, GFP_KERNEL);
35 if (!prop->value)
36 goto out_err;
37 } else {
38 /*
39 * Even if the property has no value, it must be set to a
40 * non-null value since of_get_property() is used to check
41 * some values that might or not have a values (ranges for
42 * instance). Moreover, when the node is released, prop->value
43 * is kfreed so the memory must come from kmalloc.
44 */
45 prop->value = kmalloc(1, GFP_KERNEL);
46 if (!prop->value)
47 goto out_err;
48 }
49
50 of_property_set_flag(prop, OF_DYNAMIC);
51
52 prop->length = length;
53
> 54 ret = of_changeset_add_property(ocs, np, prop);
55 if (!ret)
56 return 0;
57
58 out_err:
59 kfree(prop->value);
60 kfree(prop->name);
61 kfree(prop);
62
63 return ret;
64 }
65
66 static struct device_node *of_pci_make_node(void)
67 {
68 struct device_node *node;
69
70 node = kzalloc(sizeof(*node), GFP_KERNEL);
71 if (!node)
72 return NULL;
73
74 of_node_set_flag(node, OF_DYNAMIC);
75 of_node_set_flag(node, OF_DETACHED);
76 of_node_init(node);
77
78 return node;
79 }
80
81 static int of_pci_add_cells_props(struct device_node *node,
82 struct of_changeset *cs, int n_addr_cells,
83 int n_size_cells)
84 {
85 __be32 val;
86 int ret;
87
88 ret = of_pci_add_property(cs, node, "ranges", NULL, 0);
89 if (ret)
90 return ret;
91
92 val = __cpu_to_be32(n_addr_cells);
93 ret = of_pci_add_property(cs, node, "#address-cells", &val,
94 sizeof(__be32));
95 if (ret)
96 return ret;
97
98 val = __cpu_to_be32(n_size_cells);
99 return of_pci_add_property(cs, node, "#size-cells", &val,
100 sizeof(__be32));
101 }
102
103 static int of_pci_add_pci_bus_props(struct device_node *node,
104 struct of_changeset *cs)
105 {
106 int ret;
107
108 ret = of_pci_add_property(cs, node, "device_type", "pci",
109 strlen("pci") + 1);
110 if (ret)
111 return ret;
112
113 return of_pci_add_cells_props(node, cs, 3, 2);
114 }
115
116 static void of_pci_make_dev_node(struct pci_dev *dev)
117 {
118 static struct of_changeset cs;
119 const char *pci_type = "dev";
120 struct device_node *node;
121 __be32 val[5] = {0};
122 int ret;
123
124 node = of_pci_make_node();
125 if (!node)
126 return;
127
128 node->parent = dev->bus->dev.of_node;
> 129 of_changeset_init(&cs);
130
131 if (pci_is_bridge(dev)) {
132 ret = of_pci_add_pci_bus_props(node, &cs);
133 if (ret)
134 goto changeset_destroy;
135 pci_type = "pci";
136 }
137
138 node->full_name = kasprintf(GFP_KERNEL, "%s@%x,%x", pci_type,
139 PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
140
141 val[0] = __cpu_to_be32(dev->devfn << 8);
142 val[4] = __cpu_to_be32(SZ_4K);
143 ret = of_pci_add_property(&cs, node, "reg", val, 5 * sizeof(__be32));
144 if (ret)
145 goto changeset_destroy;
146
> 147 ret = of_changeset_attach_node(&cs, node);
148 if (ret)
149 goto changeset_destroy;
150
> 151 ret = of_changeset_apply(&cs);
152 if (ret)
153 goto changeset_destroy;
154
155 dev->dev.of_node = node;
156
157 return;
158
159 changeset_destroy:
> 160 of_changeset_destroy(&cs);
161 kfree(node);
162 }
163

--
0-DAY CI Kernel Test Service
https://01.org/lkp