hwrng: core - Fix current_rng init/cleanup race yet again

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The kref solution is still buggy because we were only focusing
on the register/unregister race.  The same race affects the
setting of current_rng through sysfs.

This patch fixes it by using kref_get_unless_zero.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

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Herbert Xu 2014-12-23 16:40:18 +11:00

parent 77584ee574

commit 15b66cd542

1 changed files with 11 additions and 3 deletions

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14

drivers/char/hw_random/core.c

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