linux/drivers/char/hw_random
Amit Shah 5c06273401 virtio: rng: delay hwrng_register() till driver is ready
Instead of calling hwrng_register() in the probe routing, call it in the
scan routine.  This ensures that when hwrng_register() is successful,
and it requests a few random bytes to seed the kernel's pool at init,
we're ready to service that request.

This will also enable us to remove the workaround added previously to
check whether probe was completed, and only then ask for data from the
host.  The revert follows in the next commit.

There's a slight behaviour change here on unsuccessful hwrng_register().
Previously, when hwrng_register() failed, the probe() routine would
fail, and the vqs would be torn down, and driver would be marked not
initialized.  Now, the vqs will remain initialized, driver would be
marked initialized as well, but won't be available in the list of RNGs
available to hwrng core.  To fix the failures, the procedure remains the
same, i.e. unload and re-load the module, and hope things succeed the
next time around.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2014-07-27 21:07:19 +09:30
..
amd-rng.c hwrng: amd - manage resource allocation 2011-05-04 15:13:15 +10:00
atmel-rng.c hwrng: atmel - Use devm_clk_get() 2014-03-10 20:13:35 +08:00
bcm63xx-rng.c hwrng: bcm63xx - remove unnecessary platform_set_drvdata() 2013-05-24 17:55:29 +08:00
bcm2835-rng.c hwrng: bcm2835 - fix oops when rng h/w is accessed during registration 2014-04-11 11:31:13 +08:00
core.c hwrng: virtio - ensure reads happen after successful probe 2014-07-14 20:48:17 +08:00
exynos-rng.c drivers/char: delete non-required instances of include <linux/init.h> 2014-02-07 15:10:19 -08:00
geode-rng.c hwrng: Use PCI_VDEVICE 2009-06-25 13:50:53 +08:00
intel-rng.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
ixp4xx-rng.c IXP4xx: HW pseudo-random generator is available on IXP45x/46x only. 2012-11-22 03:35:39 +00:00
Kconfig Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6 into next 2014-06-07 19:44:40 -07:00
Makefile hwrng: picoxcell - remove unbuildable picoxcell TRNG 2014-04-16 20:40:18 +08:00
msm-rng.c hwrng: msm - Add PRNG support for MSM SoC's 2013-10-30 12:02:56 +08:00
mxc-rnga.c hwrng: mxc-rnga - Check the return value from clk_prepare_enable() 2013-08-01 10:53:59 +10:00
n2-asm.S sparc64: Add Niagara2 RNG driver. 2008-07-18 00:46:09 -07:00
n2-drv.c hwrng: n2-drv - Introduce the use of the managed version of kzalloc 2014-05-13 19:43:48 +08:00
n2rng.h n2rng: Attach on Niagara-T3. 2011-07-28 01:26:30 -07:00
nomadik-rng.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2014-04-03 09:28:16 -07:00
octeon-rng.c drivers/char: delete non-required instances of include <linux/init.h> 2014-02-07 15:10:19 -08:00
omap3-rom-rng.c hwrng: omap3-rom - Use devm_clk_get() 2014-03-10 20:13:36 +08:00
omap-rng.c hwrng: omap - remove unnecessary OOM messages 2014-05-08 21:58:16 +08:00
pasemi-rng.c drivers: clean-up prom.h implicit includes 2013-10-09 20:04:04 -05:00
powernv-rng.c hwrng: Add a driver for the hwrng found in power7+ systems 2013-10-11 16:50:20 +11:00
ppc4xx-rng.c powerpc: add missing explicit OF includes for ppc 2013-11-11 09:10:50 -06:00
pseries-rng.c hwrng: Return errors to upper levels in pseries-rng.c 2013-10-11 16:50:18 +11:00
timeriomem-rng.c hwrng: timeriomem - remove unnecessary OOM messages 2014-05-08 21:58:16 +08:00
tpm-rng.c hw_random: add support for the TPM chip as a hardware RNG source 2012-08-22 11:11:41 -05:00
tx4939-rng.c hwrng: tx4939 - simplify use of devm_ioremap_resource 2013-08-14 20:42:04 +10:00
via-rng.c hwrng: via-rng - Mark device ID table as __maybe_unused 2013-09-13 21:43:53 +10:00
virtio-rng.c virtio: rng: delay hwrng_register() till driver is ready 2014-07-27 21:07:19 +09:30