[PATCH 4.9 002/271] powerpc/archrandom: fix arch_get_random_seed_int()

[Greg Kroah-Hartman]

From: Ard Biesheuvel <ardb@xxxxxxxxxx>

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@xxxxxxxxxx>
Signed-off-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20191204115015.18015-1-ardb@xxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 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;