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| author |   Rusty Russell <rusty@rustcorp.com.au> | 2014-12-08 16:50:38 +0800 |
|---|---|---|
| committer |   Herbert Xu <herbert@gondor.apana.org.au> | 2014-12-22 23:02:40 +1100 |
| commit | a027f30d72f2c4d27d6dd9bd053205d3102de7d1 (patch) | |
| tree | c430933226d1f44da1cb2aca7c418a9baea8e17b /include/linux/hw_random.h | |
| parent | hwrng: use reference counts on each struct hwrng. (diff) | |
| download | linux-dev-a027f30d72f2c4d27d6dd9bd053205d3102de7d1.tar.xz linux-dev-a027f30d72f2c4d27d6dd9bd053205d3102de7d1.zip | |
hwrng: fix unregister race.
The previous patch added one potential problem: we can still be
reading from a hwrng when it's unregistered. Add a wait for zero
in the hwrng_unregister path.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Amos Kong <akong@redhat.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'include/linux/hw_random.h')
| -rw-r--r-- | include/linux/hw_random.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/hw_random.h b/include/linux/hw_random.h index c212e71ea886..7832e5008959 100644 --- a/include/linux/hw_random.h +++ b/include/linux/hw_random.h @@ -46,6 +46,7 @@ struct hwrng { /* internal. */ struct list_head list; struct kref ref; + bool cleanup_done; }; /** Register a new Hardware Random Number Generator driver. */ |