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authorDavid S. Miller <davem@davemloft.net>2015-09-26 16:08:27 -0700
committerDavid S. Miller <davem@davemloft.net>2015-09-26 16:08:27 -0700
commit4963ed48f2c20196d51a447ee87dc2815584fee4 (patch)
treea1902f466dafa00453889a4f1e66b00249ce0529 /drivers/cpuidle/coupled.c
parent4d54d86546f62c7c4a0fe3b36a64c5e3b98ce1a9 (diff)
parent518a7cb6980cd640c7f979d29021ad870f60d7d7 (diff)
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Conflicts: net/ipv4/arp.c The net/ipv4/arp.c conflict was one commit adding a new local variable while another commit was deleting one. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/cpuidle/coupled.c')
-rw-r--r--drivers/cpuidle/coupled.c22
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/cpuidle/coupled.c b/drivers/cpuidle/coupled.c
index 1523e2d745eb..344058f8501a 100644
--- a/drivers/cpuidle/coupled.c
+++ b/drivers/cpuidle/coupled.c
@@ -187,6 +187,28 @@ bool cpuidle_state_is_coupled(struct cpuidle_driver *drv, int state)
}
/**
+ * cpuidle_coupled_state_verify - check if the coupled states are correctly set.
+ * @drv: struct cpuidle_driver for the platform
+ *
+ * Returns 0 for valid state values, a negative error code otherwise:
+ * * -EINVAL if any coupled state(safe_state_index) is wrongly set.
+ */
+int cpuidle_coupled_state_verify(struct cpuidle_driver *drv)
+{
+ int i;
+
+ for (i = drv->state_count - 1; i >= 0; i--) {
+ if (cpuidle_state_is_coupled(drv, i) &&
+ (drv->safe_state_index == i ||
+ drv->safe_state_index < 0 ||
+ drv->safe_state_index >= drv->state_count))
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/**
* cpuidle_coupled_set_ready - mark a cpu as ready
* @coupled: the struct coupled that contains the current cpu
*/