* [superna9999:amlogic/v5.9/s400-mipi-dsi 12/16] drivers/gpu/drm/drm_bridge.c:181:43: warning: format specifies type 'unsigned int' but the argument has type 'struct drm_encoder
@ 2020-07-31 23:21 kernel test robot
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From: kernel test robot @ 2020-07-31 23:21 UTC (permalink / raw)
To: kbuild-all
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tree: https://github.com/superna9999/linux amlogic/v5.9/s400-mipi-dsi
head: 4cbe7065356e7e68a59a0787bc4a4a3ca9375065
commit: 87c65f7a5406d7484a6e9aeab87b275f29542aed [12/16] drm: bridge: debug
config: x86_64-randconfig-a001-20200731 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project c23ae3f18ee3ff11671f4c62ffc66d150b1bcdc2)
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
# install x86_64 cross compiling tool for clang build
# apt-get install binutils-x86-64-linux-gnu
git checkout 87c65f7a5406d7484a6e9aeab87b275f29542aed
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
All warnings (new ones prefixed by >>):
>> drivers/gpu/drm/drm_bridge.c:181:43: warning: format specifies type 'unsigned int' but the argument has type 'struct drm_encoder *' [-Wformat]
pr_info("%s %08x %08x %08x\n", __func__, encoder, bridge, previous);
~~~~ ^~~~~~~
include/linux/printk.h:368:34: note: expanded from macro 'pr_info'
printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
~~~ ^~~~~~~~~~~
>> drivers/gpu/drm/drm_bridge.c:181:52: warning: format specifies type 'unsigned int' but the argument has type 'struct drm_bridge *' [-Wformat]
pr_info("%s %08x %08x %08x\n", __func__, encoder, bridge, previous);
~~~~ ^~~~~~
include/linux/printk.h:368:34: note: expanded from macro 'pr_info'
printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
~~~ ^~~~~~~~~~~
drivers/gpu/drm/drm_bridge.c:181:60: warning: format specifies type 'unsigned int' but the argument has type 'struct drm_bridge *' [-Wformat]
pr_info("%s %08x %08x %08x\n", __func__, encoder, bridge, previous);
~~~~ ^~~~~~~~
include/linux/printk.h:368:34: note: expanded from macro 'pr_info'
printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
~~~ ^~~~~~~~~~~
>> drivers/gpu/drm/drm_bridge.c:201:45: warning: variable 'ret' is uninitialized when used here [-Wuninitialized]
pr_info("%s:%d %d\n", __func__, __LINE__, ret);
^~~
include/linux/printk.h:368:34: note: expanded from macro 'pr_info'
printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
^~~~~~~~~~~
drivers/gpu/drm/drm_bridge.c:179:9: note: initialize the variable 'ret' to silence this warning
int ret;
^
= 0
4 warnings generated.
vim +181 drivers/gpu/drm/drm_bridge.c
151
152 /**
153 * drm_bridge_attach - attach the bridge to an encoder's chain
154 *
155 * @encoder: DRM encoder
156 * @bridge: bridge to attach
157 * @previous: previous bridge in the chain (optional)
158 * @flags: DRM_BRIDGE_ATTACH_* flags
159 *
160 * Called by a kms driver to link the bridge to an encoder's chain. The previous
161 * argument specifies the previous bridge in the chain. If NULL, the bridge is
162 * linked directly at the encoder's output. Otherwise it is linked at the
163 * previous bridge's output.
164 *
165 * If non-NULL the previous bridge must be already attached by a call to this
166 * function.
167 *
168 * Note that bridges attached to encoders are auto-detached during encoder
169 * cleanup in drm_encoder_cleanup(), so drm_bridge_attach() should generally
170 * *not* be balanced with a drm_bridge_detach() in driver code.
171 *
172 * RETURNS:
173 * Zero on success, error code on failure
174 */
175 int drm_bridge_attach(struct drm_encoder *encoder, struct drm_bridge *bridge,
176 struct drm_bridge *previous,
177 enum drm_bridge_attach_flags flags)
178 {
179 int ret;
180
> 181 pr_info("%s %08x %08x %08x\n", __func__, encoder, bridge, previous);
182
183 if (!encoder || !bridge)
184 return -EINVAL;
185
186 if (previous && (!previous->dev || previous->encoder != encoder))
187 return -EINVAL;
188
189 if (bridge->dev)
190 return -EBUSY;
191
192 bridge->dev = encoder->dev;
193 bridge->encoder = encoder;
194
195 if (previous)
196 list_add(&bridge->chain_node, &previous->chain_node);
197 else
198 list_add(&bridge->chain_node, &encoder->bridge_chain);
199
200 if (bridge->funcs->attach) {
> 201 pr_info("%s:%d %d\n", __func__, __LINE__, ret);
202 ret = bridge->funcs->attach(bridge, flags);
203 if (ret < 0)
204 goto err_reset_bridge;
205 }
206
207 if (bridge->funcs->atomic_reset) {
208 struct drm_bridge_state *state;
209
210 state = bridge->funcs->atomic_reset(bridge);
211 if (IS_ERR(state)) {
212 ret = PTR_ERR(state);
213 goto err_detach_bridge;
214 }
215
216 drm_atomic_private_obj_init(bridge->dev, &bridge->base,
217 &state->base,
218 &drm_bridge_priv_state_funcs);
219 }
220
221 return 0;
222
223 err_detach_bridge:
224 if (bridge->funcs->detach)
225 bridge->funcs->detach(bridge);
226
227 err_reset_bridge:
228 bridge->dev = NULL;
229 bridge->encoder = NULL;
230 list_del(&bridge->chain_node);
231 return ret;
232 }
233 EXPORT_SYMBOL(drm_bridge_attach);
234
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org
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2020-07-31 23:21 [superna9999:amlogic/v5.9/s400-mipi-dsi 12/16] drivers/gpu/drm/drm_bridge.c:181:43: warning: format specifies type 'unsigned int' but the argument has type 'struct drm_encoder kernel test robot
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