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-rw-r--r--drivers/s390/crypto/ap_bus.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/s390/crypto/ap_bus.c b/drivers/s390/crypto/ap_bus.c
index ae9ab240c7f..85785807acb 100644
--- a/drivers/s390/crypto/ap_bus.c
+++ b/drivers/s390/crypto/ap_bus.c
@@ -648,7 +648,9 @@ static int ap_bus_suspend(struct device *dev, pm_message_t state)
/* Poll on the device until all requests are finished. */
do {
flags = 0;
+ spin_lock_bh(&ap_dev->lock);
__ap_poll_device(ap_dev, &flags);
+ spin_unlock_bh(&ap_dev->lock);
} while ((flags & 1) || (flags & 2));
ap_device_remove(dev);
@@ -1407,14 +1409,12 @@ static void ap_reset(struct ap_device *ap_dev)
static int __ap_poll_device(struct ap_device *ap_dev, unsigned long *flags)
{
- spin_lock(&ap_dev->lock);
if (!ap_dev->unregistered) {
if (ap_poll_queue(ap_dev, flags))
ap_dev->unregistered = 1;
if (ap_dev->reset == AP_RESET_DO)
ap_reset(ap_dev);
}
- spin_unlock(&ap_dev->lock);
return 0;
}
@@ -1441,7 +1441,9 @@ static void ap_poll_all(unsigned long dummy)
flags = 0;
spin_lock(&ap_device_list_lock);
list_for_each_entry(ap_dev, &ap_device_list, list) {
+ spin_lock(&ap_dev->lock);
__ap_poll_device(ap_dev, &flags);
+ spin_unlock(&ap_dev->lock);
}
spin_unlock(&ap_device_list_lock);
} while (flags & 1);
@@ -1487,7 +1489,9 @@ static int ap_poll_thread(void *data)
flags = 0;
spin_lock_bh(&ap_device_list_lock);
list_for_each_entry(ap_dev, &ap_device_list, list) {
+ spin_lock(&ap_dev->lock);
__ap_poll_device(ap_dev, &flags);
+ spin_unlock(&ap_dev->lock);
}
spin_unlock_bh(&ap_device_list_lock);
}