From c5102f5935503ebebad46e137d0eef68f272cc16 Mon Sep 17 00:00:00 2001 From: Will Deacon Date: Fri, 27 Apr 2012 13:08:53 +0100 Subject: ARM: 7408/1: cacheflush: return error to userspace when flushing syscall fails The cacheflush syscall can fail for two reasons: (1) The arguments are invalid (nonsensical address range or no VMA) (2) The region generates a translation fault on a VIPT or PIPT cache This patch allows do_cache_op to return an error code to userspace in the case of the above. The various coherent_user_range implementations are modified to return 0 in the case of VIVT caches or -EFAULT in the case of an abort on v6/v7 cores. Reviewed-by: Catalin Marinas Signed-off-by: Will Deacon Signed-off-by: Russell King --- arch/arm/mm/proc-mohawk.S | 1 + 1 file changed, 1 insertion(+) (limited to 'arch/arm/mm/proc-mohawk.S') diff --git a/arch/arm/mm/proc-mohawk.S b/arch/arm/mm/proc-mohawk.S index cdfedc5b8ad8..b0475468c711 100644 --- a/arch/arm/mm/proc-mohawk.S +++ b/arch/arm/mm/proc-mohawk.S @@ -193,6 +193,7 @@ ENTRY(mohawk_coherent_user_range) cmp r0, r1 blo 1b mcr p15, 0, r0, c7, c10, 4 @ drain WB + mov r0, #0 mov pc, lr /* -- cgit v1.2.3