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| author |   Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-04-01 10:54:13 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-04-01 10:54:13 -0700 |
| commit | f5ef2abcbeb5b0be23f7cc610a024b2406e3d8e6 (patch) | |
| tree | f0ded5f4a61f4db25794d097725e1d37d872c80c | |
| parent | Merge master.kernel.org:/pub/scm/linux/kernel/git/herbert/crypto-2.6 (diff) | |
| download | linux-dev-f5ef2abcbeb5b0be23f7cc610a024b2406e3d8e6.tar.xz linux-dev-f5ef2abcbeb5b0be23f7cc610a024b2406e3d8e6.zip | |
driver core: do not wait unnecessarily in driver_unregister()
Ingo reported that built-in drivers suffered bootup hangs with certain
driver unregistry sequences, due to sysfs breakage.
Do the minimal fix for v2.6.21: only wait if the driver is a module.
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to '')
| -rw-r--r-- | drivers/base/driver.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/base/driver.c b/drivers/base/driver.c index 1214cbd17d86..082bfded3854 100644 --- a/drivers/base/driver.c +++ b/drivers/base/driver.c @@ -183,7 +183,14 @@ int driver_register(struct device_driver * drv) void driver_unregister(struct device_driver * drv) { bus_remove_driver(drv); - wait_for_completion(&drv->unloaded); + /* + * If the driver is a module, we are probably in + * the module unload path, and we want to wait + * for everything to unload before we can actually + * finish the unload. + */ + if (drv->owner) + wait_for_completion(&drv->unloaded); } /** |