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-rw-r--r--drivers/base/platform.c18
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index 17b5ece8f82c..eb84d9d44645 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -160,6 +160,11 @@ static void platform_device_release(struct device *dev)
160 * 160 *
161 * Create a platform device object which can have other objects attached 161 * Create a platform device object which can have other objects attached
162 * to it, and which will have attached objects freed when it is released. 162 * to it, and which will have attached objects freed when it is released.
163 *
164 * This device will be marked as not supporting hotpluggable drivers; no
165 * device add/remove uevents will be generated. In the unusual case that
166 * the device isn't being dynamically allocated as a legacy "probe the
167 * hardware" driver, infrastructure code should reverse this marking.
163 */ 168 */
164struct platform_device *platform_device_alloc(const char *name, unsigned int id) 169struct platform_device *platform_device_alloc(const char *name, unsigned int id)
165{ 170{
@@ -172,6 +177,12 @@ struct platform_device *platform_device_alloc(const char *name, unsigned int id)
172 pa->pdev.id = id; 177 pa->pdev.id = id;
173 device_initialize(&pa->pdev.dev); 178 device_initialize(&pa->pdev.dev);
174 pa->pdev.dev.release = platform_device_release; 179 pa->pdev.dev.release = platform_device_release;
180
181 /* prevent hotplug "modprobe $(MODALIAS)" from causing trouble in
182 * legacy probe-the-hardware drivers, which don't properly split
183 * out device enumeration logic from drivers.
184 */
185 pa->pdev.dev.uevent_suppress = 1;
175 } 186 }
176 187
177 return pa ? &pa->pdev : NULL; 188 return pa ? &pa->pdev : NULL;
@@ -351,6 +362,13 @@ EXPORT_SYMBOL_GPL(platform_device_unregister);
351 * memory allocated for the device allows drivers using such devices 362 * memory allocated for the device allows drivers using such devices
352 * to be unloaded iwithout waiting for the last reference to the device 363 * to be unloaded iwithout waiting for the last reference to the device
353 * to be dropped. 364 * to be dropped.
365 *
366 * This interface is primarily intended for use with legacy drivers
367 * which probe hardware directly. Because such drivers create sysfs
368 * device nodes themselves, rather than letting system infrastructure
369 * handle such device enumeration tasks, they don't fully conform to
370 * the Linux driver model. In particular, when such drivers are built
371 * as modules, they can't be "hotplugged".
354 */ 372 */
355struct platform_device *platform_device_register_simple(char *name, unsigned int id, 373struct platform_device *platform_device_register_simple(char *name, unsigned int id,
356 struct resource *res, unsigned int num) 374 struct resource *res, unsigned int num)