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authorDavid Howells <dhowells@redhat.com>2006-12-05 09:37:56 -0500
committerDavid Howells <dhowells@warthog.cambridge.redhat.com>2006-12-05 09:37:56 -0500
commit4c1ac1b49122b805adfa4efc620592f68dccf5db (patch)
tree87557f4bc2fd4fe65b7570489c2f610c45c0adcd /drivers/base/platform.c
parentc4028958b6ecad064b1a6303a6a5906d4fe48d73 (diff)
parentd916faace3efc0bf19fe9a615a1ab8fa1a24cd93 (diff)
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Conflicts: drivers/infiniband/core/iwcm.c drivers/net/chelsio/cxgb2.c drivers/net/wireless/bcm43xx/bcm43xx_main.c drivers/net/wireless/prism54/islpci_eth.c drivers/usb/core/hub.h drivers/usb/input/hid-core.c net/core/netpoll.c Fix up merge failures with Linus's head and fix new compilation failures. Signed-Off-By: David Howells <dhowells@redhat.com>
Diffstat (limited to 'drivers/base/platform.c')
-rw-r--r--drivers/base/platform.c48
1 files changed, 48 insertions, 0 deletions
diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index 940ce41f1887..d1df4a087924 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -388,6 +388,11 @@ static int platform_drv_probe(struct device *_dev)
388 return drv->probe(dev); 388 return drv->probe(dev);
389} 389}
390 390
391static int platform_drv_probe_fail(struct device *_dev)
392{
393 return -ENXIO;
394}
395
391static int platform_drv_remove(struct device *_dev) 396static int platform_drv_remove(struct device *_dev)
392{ 397{
393 struct platform_driver *drv = to_platform_driver(_dev->driver); 398 struct platform_driver *drv = to_platform_driver(_dev->driver);
@@ -451,6 +456,49 @@ void platform_driver_unregister(struct platform_driver *drv)
451} 456}
452EXPORT_SYMBOL_GPL(platform_driver_unregister); 457EXPORT_SYMBOL_GPL(platform_driver_unregister);
453 458
459/**
460 * platform_driver_probe - register driver for non-hotpluggable device
461 * @drv: platform driver structure
462 * @probe: the driver probe routine, probably from an __init section
463 *
464 * Use this instead of platform_driver_register() when you know the device
465 * is not hotpluggable and has already been registered, and you want to
466 * remove its run-once probe() infrastructure from memory after the driver
467 * has bound to the device.
468 *
469 * One typical use for this would be with drivers for controllers integrated
470 * into system-on-chip processors, where the controller devices have been
471 * configured as part of board setup.
472 *
473 * Returns zero if the driver registered and bound to a device, else returns
474 * a negative error code and with the driver not registered.
475 */
476int platform_driver_probe(struct platform_driver *drv,
477 int (*probe)(struct platform_device *))
478{
479 int retval, code;
480
481 /* temporary section violation during probe() */
482 drv->probe = probe;
483 retval = code = platform_driver_register(drv);
484
485 /* Fixup that section violation, being paranoid about code scanning
486 * the list of drivers in order to probe new devices. Check to see
487 * if the probe was successful, and make sure any forced probes of
488 * new devices fail.
489 */
490 spin_lock(&platform_bus_type.klist_drivers.k_lock);
491 drv->probe = NULL;
492 if (code == 0 && list_empty(&drv->driver.klist_devices.k_list))
493 retval = -ENODEV;
494 drv->driver.probe = platform_drv_probe_fail;
495 spin_unlock(&platform_bus_type.klist_drivers.k_lock);
496
497 if (code != retval)
498 platform_driver_unregister(drv);
499 return retval;
500}
501EXPORT_SYMBOL_GPL(platform_driver_probe);
454 502
455/* modalias support enables more hands-off userspace setup: 503/* modalias support enables more hands-off userspace setup:
456 * (a) environment variable lets new-style hotplug events work once system is 504 * (a) environment variable lets new-style hotplug events work once system is