From: Amit Shah <amit.shah@redhat.com>
Date: Thu, 10 Jul 2014 10:12:34 +0000 (+0530)
Subject: hwrng: fetch randomness only after device init
X-Git-Tag: omap-for-v3.17/fixes-against-rc2~275^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d3cc7996473a7bdd33256029988ea690754e4e2a;p=pandora-kernel.git

hwrng: fetch randomness only after device init

Commit d9e7972619334 "hwrng: add randomness to system from rng sources"
added a call to rng_get_data() from the hwrng_register() function.
However, some rng devices need initialization before data can be read
from them.

This commit makes the call to rng_get_data() depend on no init fn
pointer being registered by the device.  If an init function is
registered, this call is made after device init.

CC: Kees Cook <keescook@chromium.org>
CC: Jason Cooper <jason@lakedaemon.net>
CC: Herbert Xu <herbert@gondor.apana.org.au>
CC: <stable@vger.kernel.org> # For v3.15+
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Reviewed-by: Jason Cooper <jason@lakedaemon.net>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
---

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