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authorRafael J. Wysocki <rjw@sisk.pl>2008-02-04 22:30:13 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-05 09:44:23 -0800
commita41e3dc4060cca2599afa14fbd4c745763746ba8 (patch)
treec97d189602b6564054f348dbfc2c865baafecd96 /drivers/char/hw_random
parent533354d4ac48b7df99f18f952e5d51c3f59ba56c (diff)
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HWRNG: add possibility to remove hwrng devices during suspend/resume
Make it possible to unregister a Hardware Random Number Generator device object in a safe way during a suspend/resume cycle. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Michael Buesch <mb@bu3sch.de> Cc: Michael Buesch <mb@bu3sch.de> Cc: Pavel Machek <pavel@ucw.cz> Cc: "John W. Linville" <linville@tuxdriver.com> Cc: Alan Stern <stern@rowland.harvard.edu> Cc: Len Brown <lenb@kernel.org> Cc: Greg KH <greg@kroah.com> Cc: Kay Sievers <kay.sievers@vrfy.org> Cc: Richard Purdie <rpurdie@rpsys.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/char/hw_random')
-rw-r--r--drivers/char/hw_random/core.c10
1 files changed, 5 insertions, 5 deletions
diff --git a/drivers/char/hw_random/core.c b/drivers/char/hw_random/core.c
index 0118b98..84cdf90 100644
--- a/drivers/char/hw_random/core.c
+++ b/drivers/char/hw_random/core.c
@@ -234,11 +234,11 @@ static DEVICE_ATTR(rng_available, S_IRUGO,
NULL);
-static void unregister_miscdev(void)
+static void unregister_miscdev(bool suspended)
{
device_remove_file(rng_miscdev.this_device, &dev_attr_rng_available);
device_remove_file(rng_miscdev.this_device, &dev_attr_rng_current);
- misc_deregister(&rng_miscdev);
+ __misc_deregister(&rng_miscdev, suspended);
}
static int register_miscdev(void)
@@ -313,7 +313,7 @@ out:
}
EXPORT_SYMBOL_GPL(hwrng_register);
-void hwrng_unregister(struct hwrng *rng)
+void __hwrng_unregister(struct hwrng *rng, bool suspended)
{
int err;
@@ -332,11 +332,11 @@ void hwrng_unregister(struct hwrng *rng)
}
}
if (list_empty(&rng_list))
- unregister_miscdev();
+ unregister_miscdev(suspended);
mutex_unlock(&rng_mutex);
}
-EXPORT_SYMBOL_GPL(hwrng_unregister);
+EXPORT_SYMBOL_GPL(__hwrng_unregister);
MODULE_DESCRIPTION("H/W Random Number Generator (RNG) driver");