Rusty Russell 3a2c0ba5ad hwrng: use reference counts on each struct hwrng. ...

current_rng holds one reference, and we bump it every time we want
to do a read from it.

This means we only hold the rng_mutex to grab or drop a reference,
so accessing /sys/devices/virtual/misc/hw_random/rng_current doesn't
block on read of /dev/hwrng.

Using a kref is overkill (we're always under the rng_mutex), but
a standard pattern.

This also solves the problem that the hwrng_fillfn thread was
accessing current_rng without a lock, which could change (eg. to NULL)
underneath it.

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>

2014-12-22 23:02:39 +11:00

..

amd-rng.c

hwrng: printk replacement

2014-10-02 14:35:00 +08:00

atmel-rng.c

Driver core patches for 3.19-rc1

2014-12-14 16:10:09 -08:00

bcm63xx-rng.c

char: hw_random: drop owner assignment from platform_drivers

2014-10-20 16:20:20 +02:00

bcm2835-rng.c

char: hw_random: drop owner assignment from platform_drivers

2014-10-20 16:20:20 +02:00

core.c

hwrng: use reference counts on each struct hwrng.

2014-12-22 23:02:39 +11:00

exynos-rng.c

Driver core patches for 3.19-rc1

2014-12-14 16:10:09 -08:00

geode-rng.c

hwrng: printk replacement

2014-10-02 14:35:00 +08:00

intel-rng.c

hwrng: printk replacement

2014-10-02 14:35:00 +08:00

ixp4xx-rng.c

IXP4xx: HW pseudo-random generator is available on IXP45x/46x only.

2012-11-22 03:35:39 +00:00

Kconfig

hwrng: atmel - add DT support

2014-11-20 22:39:41 +08:00

Makefile

hwrng: xgene - add support for APM X-Gene SoC RNG support

2014-08-29 21:46:38 +08:00

msm-rng.c

char: hw_random: drop owner assignment from platform_drivers

2014-10-20 16:20:20 +02:00

mxc-rnga.c

char: hw_random: drop owner assignment from platform_drivers

2014-10-20 16:20:20 +02:00

n2-asm.S

sparc64: Add Niagara2 RNG driver.

2008-07-18 00:46:09 -07:00

n2-drv.c

char: hw_random: drop owner assignment from platform_drivers

2014-10-20 16:20:20 +02:00

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

char: hw_random: drop owner assignment from platform_drivers

2014-10-20 16:20:20 +02:00

omap3-rom-rng.c

char: hw_random: drop owner assignment from platform_drivers

2014-10-20 16:20:20 +02:00

omap-rng.c

char: hw_random: drop owner assignment from platform_drivers

2014-10-20 16:20:20 +02:00

pasemi-rng.c

char: hw_random: drop owner assignment from platform_drivers

2014-10-20 16:20:20 +02:00

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

char: hw_random: drop owner assignment from platform_drivers

2014-10-20 16:20:20 +02:00

pseries-rng.c

hwrng: pseries - port to new read API and fix stack corruption

2014-11-06 23:10:22 +08:00

timeriomem-rng.c

char: hw_random: drop owner assignment from platform_drivers

2014-10-20 16:20:20 +02:00

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

char: hw_random: drop owner assignment from platform_drivers

2014-10-20 16:20:20 +02:00

via-rng.c

hwrng: printk replacement

2014-10-02 14:35:00 +08:00

virtio-rng.c

One cc: stable commit, the rest are a series of minor cleanups which have

2014-10-18 10:25:09 -07:00

xgene-rng.c

hwrng: xgene - add support for APM X-Gene SoC RNG support

2014-08-29 21:46:38 +08:00