From 95707d852856aec1cbdad1873ff2dc5161a5cb91 Mon Sep 17 00:00:00 2001 From: Vaidyanathan Srinivasan Date: Sun, 3 Aug 2014 13:23:08 +0530 Subject: [PATCH] powerpc/cpuidle: Fix parsing of idle state flags from device-tree Flags from device-tree need to be parsed with accessors for interpreting correct value in little-endian. Signed-off-by: Vaidyanathan Srinivasan Reviewed-by: Preeti U. Murthy CC: Signed-off-by: Benjamin Herrenschmidt --- drivers/cpuidle/cpuidle-powernv.c | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) diff --git a/drivers/cpuidle/cpuidle-powernv.c b/drivers/cpuidle/cpuidle-powernv.c index 74f5788d50b1..a64be578dab2 100644 --- a/drivers/cpuidle/cpuidle-powernv.c +++ b/drivers/cpuidle/cpuidle-powernv.c @@ -160,10 +160,10 @@ static int powernv_cpuidle_driver_init(void) static int powernv_add_idle_states(void) { struct device_node *power_mgt; - struct property *prop; int nr_idle_states = 1; /* Snooze */ int dt_idle_states; - u32 *flags; + const __be32 *idle_state_flags; + u32 len_flags, flags; int i; /* Currently we have snooze statically defined */ @@ -174,18 +174,18 @@ static int powernv_add_idle_states(void) return nr_idle_states; } - prop = of_find_property(power_mgt, "ibm,cpu-idle-state-flags", NULL); - if (!prop) { + idle_state_flags = of_get_property(power_mgt, "ibm,cpu-idle-state-flags", &len_flags); + if (!idle_state_flags) { pr_warn("DT-PowerMgmt: missing ibm,cpu-idle-state-flags\n"); return nr_idle_states; } - dt_idle_states = prop->length / sizeof(u32); - flags = (u32 *) prop->value; + dt_idle_states = len_flags / sizeof(u32); for (i = 0; i < dt_idle_states; i++) { - if (flags[i] & IDLE_USE_INST_NAP) { + flags = be32_to_cpu(idle_state_flags[i]); + if (flags & IDLE_USE_INST_NAP) { /* Add NAP state */ strcpy(powernv_states[nr_idle_states].name, "Nap"); strcpy(powernv_states[nr_idle_states].desc, "Nap"); @@ -196,7 +196,7 @@ static int powernv_add_idle_states(void) nr_idle_states++; } - if (flags[i] & IDLE_USE_INST_SLEEP) { + if (flags & IDLE_USE_INST_SLEEP) { /* Add FASTSLEEP state */ strcpy(powernv_states[nr_idle_states].name, "FastSleep"); strcpy(powernv_states[nr_idle_states].desc, "FastSleep"); -- GitLab