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From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Sasha Levin <sashal@kernel.org>,
	linuxppc-dev@lists.ozlabs.org, Ard Biesheuvel <ardb@kernel.org>
Subject: [PATCH AUTOSEL 4.9 250/251] powerpc/archrandom: fix arch_get_random_seed_int()
Date: Thu, 16 Jan 2020 12:36:39 -0500
Message-ID: <20200116173641.22137-210-sashal@kernel.org> (raw)
In-Reply-To: <20200116173641.22137-1-sashal@kernel.org>

From: Ard Biesheuvel <ardb@kernel.org>

[ Upstream commit b6afd1234cf93aa0d71b4be4788c47534905f0be ]

Commit 01c9348c7620ec65

  powerpc: Use hardware RNG for arch_get_random_seed_* not arch_get_random_*

updated arch_get_random_[int|long]() to be NOPs, and moved the hardware
RNG backing to arch_get_random_seed_[int|long]() instead. However, it
failed to take into account that arch_get_random_int() was implemented
in terms of arch_get_random_long(), and so we ended up with a version
of the former that is essentially a NOP as well.

Fix this by calling arch_get_random_seed_long() from
arch_get_random_seed_int() instead.

Fixes: 01c9348c7620ec65 ("powerpc: Use hardware RNG for arch_get_random_seed_* not arch_get_random_*")
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20191204115015.18015-1-ardb@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 arch/powerpc/include/asm/archrandom.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/include/asm/archrandom.h b/arch/powerpc/include/asm/archrandom.h
index 85e88f7a59c0..9ff848e3c4a6 100644
--- a/arch/powerpc/include/asm/archrandom.h
+++ b/arch/powerpc/include/asm/archrandom.h
@@ -27,7 +27,7 @@ static inline int arch_get_random_seed_int(unsigned int *v)
 	unsigned long val;
 	int rc;
 
-	rc = arch_get_random_long(&val);
+	rc = arch_get_random_seed_long(&val);
 	if (rc)
 		*v = val;
 
-- 
2.20.1


      parent reply index

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20200116173641.22137-1-sashal@kernel.org>
2020-01-16 17:33 ` [PATCH AUTOSEL 4.9 043/251] ASoC: imx-sgtl5000: put of nodes if finding codec fails Sasha Levin
2020-01-16 17:34 ` [PATCH AUTOSEL 4.9 110/251] soc/fsl/qe: Fix an error code in qe_pin_request() Sasha Levin
2020-01-16 17:34 ` [PATCH AUTOSEL 4.9 117/251] powerpc: vdso: Make vdso32 installation conditional in vdso_install Sasha Levin
2020-01-16 17:35 ` [PATCH AUTOSEL 4.9 152/251] powerpc/cacheinfo: add cacheinfo_teardown, cacheinfo_rebuild Sasha Levin
2020-01-16 17:35 ` [PATCH AUTOSEL 4.9 159/251] perf/ioctl: Add check for the sample_period value Sasha Levin
2020-01-16 17:35 ` [PATCH AUTOSEL 4.9 174/251] ALSA: aoa: onyx: always initialize register read value Sasha Levin
2020-01-16 17:36 ` [PATCH AUTOSEL 4.9 246/251] powerpc/powernv: Disable native PCIe port management Sasha Levin
2020-01-16 17:36 ` Sasha Levin [this message]

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