drivers/leds/simple/simatic-ipc-leds.c:42:17: sparse: sparse: symbol 'simatic_ipc_led_mem_res' was not declared. Should it be static?
From: kernel test robot
Date: Wed Jan 12 2022 - 20:29:35 EST
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: f079ab01b5609fb0c9acc52c88168bf1eed82373
commit: 8c78e0614edc628b13313afd28856720b85d86a3 leds: simatic-ipc-leds: add new driver for Siemens Industial PCs
date: 3 weeks ago
config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20220113/202201130807.DvdFeysr-lkp@xxxxxxxxx/config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce:
# apt-get install sparse
# sparse version: v0.6.4-dirty
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8c78e0614edc628b13313afd28856720b85d86a3
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 8c78e0614edc628b13313afd28856720b85d86a3
# save the config file to linux build tree
mkdir build_dir
make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/leds/simple/ drivers/platform/x86/
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>
sparse warnings: (new ones prefixed by >>)
>> drivers/leds/simple/simatic-ipc-leds.c:42:17: sparse: sparse: symbol 'simatic_ipc_led_mem_res' was not declared. Should it be static?
>> drivers/leds/simple/simatic-ipc-leds.c:155:40: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected void *static [toplevel] simatic_ipc_led_memory @@ got void [noderef] __iomem * @@
drivers/leds/simple/simatic-ipc-leds.c:155:40: sparse: expected void *static [toplevel] simatic_ipc_led_memory
drivers/leds/simple/simatic-ipc-leds.c:155:40: sparse: got void [noderef] __iomem *
vim +/simatic_ipc_led_mem_res +42 drivers/leds/simple/simatic-ipc-leds.c
40
41 /* the actual start will be discovered with PCI, 0 is a placeholder */
> 42 struct resource simatic_ipc_led_mem_res = DEFINE_RES_MEM_NAMED(0, SZ_4K, KBUILD_MODNAME);
43
44 static void *simatic_ipc_led_memory;
45
46 static struct simatic_ipc_led simatic_ipc_leds_mem[] = {
47 {0x500 + 0x1A0, "red:" LED_FUNCTION_STATUS "-1"},
48 {0x500 + 0x1A8, "green:" LED_FUNCTION_STATUS "-1"},
49 {0x500 + 0x1C8, "red:" LED_FUNCTION_STATUS "-2"},
50 {0x500 + 0x1D0, "green:" LED_FUNCTION_STATUS "-2"},
51 {0x500 + 0x1E0, "red:" LED_FUNCTION_STATUS "-3"},
52 {0x500 + 0x198, "green:" LED_FUNCTION_STATUS "-3"},
53 { }
54 };
55
56 static struct resource simatic_ipc_led_io_res =
57 DEFINE_RES_IO_NAMED(SIMATIC_IPC_LED_PORT_BASE, SZ_2, KBUILD_MODNAME);
58
59 static DEFINE_SPINLOCK(reg_lock);
60
61 static inline struct simatic_ipc_led *cdev_to_led(struct led_classdev *led_cd)
62 {
63 return container_of(led_cd, struct simatic_ipc_led, cdev);
64 }
65
66 static void simatic_ipc_led_set_io(struct led_classdev *led_cd,
67 enum led_brightness brightness)
68 {
69 struct simatic_ipc_led *led = cdev_to_led(led_cd);
70 unsigned long flags;
71 unsigned int val;
72
73 spin_lock_irqsave(®_lock, flags);
74
75 val = inw(SIMATIC_IPC_LED_PORT_BASE);
76 if (brightness == LED_OFF)
77 outw(val | led->value, SIMATIC_IPC_LED_PORT_BASE);
78 else
79 outw(val & ~led->value, SIMATIC_IPC_LED_PORT_BASE);
80
81 spin_unlock_irqrestore(®_lock, flags);
82 }
83
84 static enum led_brightness simatic_ipc_led_get_io(struct led_classdev *led_cd)
85 {
86 struct simatic_ipc_led *led = cdev_to_led(led_cd);
87
88 return inw(SIMATIC_IPC_LED_PORT_BASE) & led->value ? LED_OFF : led_cd->max_brightness;
89 }
90
91 static void simatic_ipc_led_set_mem(struct led_classdev *led_cd,
92 enum led_brightness brightness)
93 {
94 struct simatic_ipc_led *led = cdev_to_led(led_cd);
95
96 u32 *p;
97
98 p = simatic_ipc_led_memory + led->value;
99 *p = (*p & ~1) | (brightness == LED_OFF);
100 }
101
102 static enum led_brightness simatic_ipc_led_get_mem(struct led_classdev *led_cd)
103 {
104 struct simatic_ipc_led *led = cdev_to_led(led_cd);
105
106 u32 *p;
107
108 p = simatic_ipc_led_memory + led->value;
109 return (*p & 1) ? LED_OFF : led_cd->max_brightness;
110 }
111
112 static int simatic_ipc_leds_probe(struct platform_device *pdev)
113 {
114 const struct simatic_ipc_platform *plat = pdev->dev.platform_data;
115 struct device *dev = &pdev->dev;
116 struct simatic_ipc_led *ipcled;
117 struct led_classdev *cdev;
118 struct resource *res;
119 int err, type;
120 u32 *p;
121
122 switch (plat->devmode) {
123 case SIMATIC_IPC_DEVICE_227D:
124 case SIMATIC_IPC_DEVICE_427E:
125 res = &simatic_ipc_led_io_res;
126 ipcled = simatic_ipc_leds_io;
127 /* on 227D the two bytes work the other way araound */
128 if (plat->devmode == SIMATIC_IPC_DEVICE_227D) {
129 while (ipcled->value) {
130 ipcled->value = swab16(ipcled->value);
131 ipcled++;
132 }
133 ipcled = simatic_ipc_leds_io;
134 }
135 type = IORESOURCE_IO;
136 if (!devm_request_region(dev, res->start, resource_size(res), KBUILD_MODNAME)) {
137 dev_err(dev, "Unable to register IO resource at %pR\n", res);
138 return -EBUSY;
139 }
140 break;
141 case SIMATIC_IPC_DEVICE_127E:
142 res = &simatic_ipc_led_mem_res;
143 ipcled = simatic_ipc_leds_mem;
144 type = IORESOURCE_MEM;
145
146 /* get GPIO base from PCI */
147 res->start = simatic_ipc_get_membase0(PCI_DEVFN(13, 0));
148 if (res->start == 0)
149 return -ENODEV;
150
151 /* do the final address calculation */
152 res->start = res->start + (0xC5 << 16);
153 res->end += res->start;
154
> 155 simatic_ipc_led_memory = devm_ioremap_resource(dev, res);
156 if (IS_ERR(simatic_ipc_led_memory))
157 return PTR_ERR(simatic_ipc_led_memory);
158
159 /* initialize power/watchdog LED */
160 p = simatic_ipc_led_memory + 0x500 + 0x1D8; /* PM_WDT_OUT */
161 *p = (*p & ~1);
162 p = simatic_ipc_led_memory + 0x500 + 0x1C0; /* PM_BIOS_BOOT_N */
163 *p = (*p | 1);
164
165 break;
166 default:
167 return -ENODEV;
168 }
169
170 while (ipcled->value) {
171 cdev = &ipcled->cdev;
172 if (type == IORESOURCE_MEM) {
173 cdev->brightness_set = simatic_ipc_led_set_mem;
174 cdev->brightness_get = simatic_ipc_led_get_mem;
175 } else {
176 cdev->brightness_set = simatic_ipc_led_set_io;
177 cdev->brightness_get = simatic_ipc_led_get_io;
178 }
179 cdev->max_brightness = LED_ON;
180 cdev->name = ipcled->name;
181
182 err = devm_led_classdev_register(dev, cdev);
183 if (err < 0)
184 return err;
185 ipcled++;
186 }
187
188 return 0;
189 }
190
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx