usb: chipidea: debug: add runtime pm for register access
Add runtime pm operations for registers access to avoid system hang.
Signed-off-by: Li Jun <jun.li@freescale.com>
diff --git a/drivers/usb/chipidea/debug.c b/drivers/usb/chipidea/debug.c
index 5b7061a..64b6a47 100644
--- a/drivers/usb/chipidea/debug.c
+++ b/drivers/usb/chipidea/debug.c
@@ -66,9 +66,11 @@
unsigned long flags;
unsigned mode;
+ pm_runtime_get_sync(ci->dev);
spin_lock_irqsave(&ci->lock, flags);
mode = hw_port_test_get(ci);
spin_unlock_irqrestore(&ci->lock, flags);
+ pm_runtime_put_sync(ci->dev);
seq_printf(s, "mode = %u\n", mode);
@@ -98,9 +100,11 @@
if (sscanf(buf, "%u", &mode) != 1)
return -EINVAL;
+ pm_runtime_get_sync(ci->dev);
spin_lock_irqsave(&ci->lock, flags);
ret = hw_port_test_set(ci, mode);
spin_unlock_irqrestore(&ci->lock, flags);
+ pm_runtime_put_sync(ci->dev);
return ret ? ret : count;
}
@@ -316,8 +320,10 @@
if (role == CI_ROLE_END || role == ci->role)
return -EINVAL;
+ pm_runtime_get_sync(ci->dev);
ci_role_stop(ci);
ret = ci_role_start(ci, role);
+ pm_runtime_put_sync(ci->dev);
return ret ? ret : count;
}