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powerpc/cpuidle: Fix parsing of idle state flags from device-tree

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commit 95707d8528 upstream.

Flags from device-tree need to be parsed with accessors for
interpreting correct value in little-endian.

Signed-off-by: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>
Reviewed-by: Preeti U. Murthy <preeti@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Vaidyanathan Srinivasan
2014-08-03 13:23:08 +05:30
committed by Greg Kroah-Hartman
parent ca0cfb304a
commit 41b071acdb
1 changed files with 8 additions and 8 deletions
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16
drivers/cpuidle/cpuidle-powernv.c
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@@ -160,10 +160,10 @@ static int powernv_cpuidle_driver_init(void)
static int powernv_add_idle_states(void) static int powernv_add_idle_states(void)
{ {
struct device_node *power_mgt; struct device_node *power_mgt;
struct property *prop;
int nr_idle_states = 1; /* Snooze */ int nr_idle_states = 1; /* Snooze */
int dt_idle_states; int dt_idle_states;
u32 *flags; const __be32 *idle_state_flags;
u32 len_flags, flags;
int i; int i;
/* Currently we have snooze statically defined */ /* Currently we have snooze statically defined */
@@ -174,18 +174,18 @@ static int powernv_add_idle_states(void)
return nr_idle_states; return nr_idle_states;
} }
prop = of_find_property(power_mgt, "ibm,cpu-idle-state-flags", NULL); idle_state_flags = of_get_property(power_mgt, "ibm,cpu-idle-state-flags", &len_flags);
if (!prop) { if (!idle_state_flags) {
pr_warn("DT-PowerMgmt: missing ibm,cpu-idle-state-flags\n"); pr_warn("DT-PowerMgmt: missing ibm,cpu-idle-state-flags\n");
return nr_idle_states; return nr_idle_states;
} }
dt_idle_states = prop->length / sizeof(u32); dt_idle_states = len_flags / sizeof(u32);
flags = (u32 *) prop->value;
for (i = 0; i < dt_idle_states; i++) { 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 */ /* Add NAP state */
strcpy(powernv_states[nr_idle_states].name, "Nap"); strcpy(powernv_states[nr_idle_states].name, "Nap");
strcpy(powernv_states[nr_idle_states].desc, "Nap"); strcpy(powernv_states[nr_idle_states].desc, "Nap");
@@ -196,7 +196,7 @@ static int powernv_add_idle_states(void)
nr_idle_states++; nr_idle_states++;
} }
if (flags[i] & IDLE_USE_INST_SLEEP) { if (flags & IDLE_USE_INST_SLEEP) {
/* Add FASTSLEEP state */ /* Add FASTSLEEP state */
strcpy(powernv_states[nr_idle_states].name, "FastSleep"); strcpy(powernv_states[nr_idle_states].name, "FastSleep");
strcpy(powernv_states[nr_idle_states].desc, "FastSleep"); strcpy(powernv_states[nr_idle_states].desc, "FastSleep");