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039980de89
linux/drivers/char/hw_random
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Martin Kaiser 039980de89 hwrng: nomadik - keep clock enabled while hwrng is registered 
The nomadik driver uses devres to register itself with the hwrng core,
the driver will be unregistered from hwrng when its device goes out of
scope. This happens after the driver's remove function is called.

However, nomadik's clock is disabled in the remove function. There's a
short timeframe where nomadik is still registered with the hwrng core
although its clock is disabled. I suppose the clock must be active to
access the hardware and serve requests from the hwrng core.

Switch to devm_clk_get_enabled and let devres disable the clock and
unregister the hwrng. This avoids the race condition.

Fixes: 3e75241be8 ("hwrng: drivers - Use device-managed registration API")
Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2023-07-20 22:16:23 +12:00
..
amd-rng.c hwrng: amd - Fix PCI device refcount leak 2022-12-09 18:45:00 +08:00
arm_smccc_trng.c hwrng: arm-smccc-trng - fix NO_ENTROPY handling 2022-08-19 18:39:35 +08:00
atmel-rng.c hwrng: atmel - remove extra line 2022-03-03 10:46:19 +12:00
ba431-rng.c hwrng: ba431 - use devm_platform_ioremap_resource() to simplify 2021-03-19 21:59:46 +11:00
bcm2835-rng.c hwrng: bcm2835 - use hwrng_msleep() instead of cpu_relax() 2022-10-14 19:03:09 +08:00
cavium-rng-vf.c hwrng: core - treat default_quality as a maximum and default to 1024 2022-11-18 16:59:34 +08:00
cavium-rng.c hwrng: cavium - Check health status while reading random data 2021-11-20 15:02:07 +11:00
cctrng.c hwrng: cctrng - delete redundant printing of return value 2021-03-19 21:59:47 +11:00
cctrng.h hwrng: cctrng - introduce Arm CryptoCell driver 2020-04-16 16:49:20 +10:00
cn10k-rng.c hwrng: cn10k - Add extended trng register support 2023-06-02 18:21:32 +08:00
core.c This update includes the following changes: 2022-12-14 12:31:09 -08:00
exynos-trng.c hwrng: exynos - Use pm_runtime_resume_and_get() to replace open coding 2021-06-03 20:24:04 +08:00
geode-rng.c hwrng: geode - Fix PCI device refcount leak 2022-12-09 18:45:00 +08:00
hisi-rng.c hwrng: hisi - Fix W=1 unused variable warning 2020-07-09 18:25:12 +10:00
histb-rng.c hwrng: histb - Move driver to drivers/char/hw_random/histb-rng.c 2023-05-12 18:48:01 +08:00
imx-rngc.c hwrng: imx-rngc - switch to DEFINE_SIMPLE_DEV_PM_OPS 2023-06-23 16:15:37 +08:00
ingenic-rng.c crypto: ingenic - Drop kfree for memory allocated with devm_kzalloc 2020-08-21 14:43:51 +10:00
ingenic-trng.c hwrng: ingenic - Fix a resource leak in an error handling path 2021-01-03 08:41:37 +11:00
intel-rng.c hwrng: rename 'mod_init' & 'mod_exit' functions to be module-specific 2021-07-16 15:49:36 +08:00
iproc-rng200.c treewide: Replace GPLv2 boilerplate/reference with SPDX - gpl-2.0_30.RULE (part 1) 2022-06-10 14:51:35 +02:00
ixp4xx-rng.c hwrng: ixp4xx - Make use of the helper function devm_platform_ioremap_resource() 2021-09-17 11:06:14 +08:00
jh7110-trng.c hwrng: starfive - Add TRNG driver for StarFive SoC 2023-01-27 18:58:09 +08:00
Kconfig hwrng: st - support compile-testing 2023-06-23 16:15:37 +08:00
ks-sa-rng.c hwrng: ks-sa - Use pm_runtime_resume_and_get() to replace open coding 2021-06-03 20:24:04 +08:00
Makefile hwrng: histb - Move driver to drivers/char/hw_random/histb-rng.c 2023-05-12 18:48:01 +08:00
meson-rng.c hwrng: meson - remove not needed call to platform_set_drvdata 2023-03-14 17:06:42 +08:00
mpfs-rng.c hwrng: core - treat default_quality as a maximum and default to 1024 2022-11-18 16:59:34 +08:00
mtk-rng.c hwrng: mtk - add mt7986 support 2022-10-21 19:15:35 +08:00
mxc-rnga.c hwrng: mxc-rnga - use semicolons rather than commas to separate statements 2020-10-02 18:02:15 +10:00
n2-asm.S License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
n2-drv.c hwrng: n2-drv - fix typo 2019-08-08 12:07:49 +10:00
n2rng.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
nomadik-rng.c hwrng: nomadik - keep clock enabled while hwrng is registered 2023-07-20 22:16:23 +12:00
npcm-rng.c hwrng: core - treat default_quality as a maximum and default to 1024 2022-11-18 16:59:34 +08:00
octeon-rng.c hwrng: octeon - Fix sparse warnings 2020-07-09 18:25:14 +10:00
omap3-rom-rng.c hwrng: omap3-rom - fix using wrong clk_disable() in omap_rom_rng_runtime_resume() 2022-05-20 13:54:45 +08:00
omap-rng.c hwrng: omap - Use pm_runtime_resume_and_get() to replace open coding 2021-06-03 20:24:04 +08:00
optee-rng.c hwrng: optee - remove redundant initialization to variable rng_size 2022-04-29 13:44:58 +08:00
pasemi-rng.c hwrng: pasemi - use devm_platform_ioremap_resource() to simplify code 2019-10-26 02:09:56 +11:00
pic32-rng.c hwrng: pic32 - Use device-managed registration API 2021-03-13 00:04:00 +11:00
powernv-rng.c random: do not include <asm/archrandom.h> from random.h 2022-12-20 03:13:45 +01:00
pseries-rng.c char: hw_random: pseries-rng: Demote non-conformant kernel-doc header 2021-05-21 10:09:30 +02:00
s390-trng.c random: do not include <asm/archrandom.h> from random.h 2022-12-20 03:13:45 +01:00
st-rng.c hwrng: st - keep clock enabled while hwrng is registered 2023-06-23 16:15:37 +08:00
stm32-rng.c hwrng: stm32 - rename readl return value 2022-11-18 16:59:34 +08:00
timeriomem-rng.c hwrng: core - treat default_quality as a maximum and default to 1024 2022-11-18 16:59:34 +08:00
via-rng.c hwrng: via - Fix comment typo 2022-07-22 16:22:04 +08:00
virtio-rng.c hwrng: virtio - Fix race on data_avail and actual data 2023-05-12 18:48:01 +08:00
xgene-rng.c hwrng: xgene - remove unnecessary (void*) conversions 2023-03-24 18:22:28 +08:00
xiphera-trng.c hwrng: xiphera-trng - use devm_platform_ioremap_resource() to simplify 2021-03-07 15:13:14 +11:00