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Date: Tue, 28 Jan 2020 15:02:31 +0100 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Ard Biesheuvel <ardb@...nel.org>, Michael Ellerman <mpe@...erman.id.au> Subject: [PATCH 4.9 002/271] powerpc/archrandom: fix arch_get_random_seed_int() From: Ard Biesheuvel <ardb@...nel.org> commit b6afd1234cf93aa0d71b4be4788c47534905f0be upstream. 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@...nel.org> Signed-off-by: Michael Ellerman <mpe@...erman.id.au> Link: https://lore.kernel.org/r/20191204115015.18015-1-ardb@kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org> --- arch/powerpc/include/asm/archrandom.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- 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_i unsigned long val; int rc; - rc = arch_get_random_long(&val); + rc = arch_get_random_seed_long(&val); if (rc) *v = val;
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