From d968d2b801d877601d54e35e6dd0f52d9c797c99 Mon Sep 17 00:00:00 2001 From: Will Deacon <will.deacon@arm.com> Date: Thu, 16 Aug 2012 19:02:12 +0100 Subject: [PATCH] ARM: 7497/1: hw_breakpoint: allow single-byte watchpoints on all addresses Breakpoint validation currently fails for single-byte watchpoints on addresses ending in 11b. There is no reason to forbid such a watchpoint, so extend the validation code to allow it. Cc: Ulrich Weigand <Ulrich.Weigand@de.ibm.com> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> --- arch/arm/kernel/hw_breakpoint.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/arch/arm/kernel/hw_breakpoint.c b/arch/arm/kernel/hw_breakpoint.c index 18d39ea4c02f8..281bf3301241f 100644 --- a/arch/arm/kernel/hw_breakpoint.c +++ b/arch/arm/kernel/hw_breakpoint.c @@ -610,13 +610,14 @@ int arch_validate_hwbkpt_settings(struct perf_event *bp) /* Aligned */ break; case 1: - /* Allow single byte watchpoint. */ - if (info->ctrl.len == ARM_BREAKPOINT_LEN_1) - break; case 2: /* Allow halfword watchpoints and breakpoints. */ if (info->ctrl.len == ARM_BREAKPOINT_LEN_2) break; + case 3: + /* Allow single byte watchpoint. */ + if (info->ctrl.len == ARM_BREAKPOINT_LEN_1) + break; default: ret = -EINVAL; goto out; -- GitLab