[S390] zcrypt: Use spin_lock_bh in suspend callback
Fix lock dependency warning.
inconsistent {IN-SOFTIRQ-W} -> {SOFTIRQ-ON-W} usage.
bash/1442 [HC0[0]:SC0[0]:HE1:SE1] takes:
(&ap_dev->lock){+.?...}, at: [<000003e001280404>] __ap_poll_device+0x40/0x3e8 [ap]
{IN-SOFTIRQ-W} state was registered at:
[<000000000017f094>] __lock_acquire+0xb78/0x182c
[<000000000017fe8e>] lock_acquire+0x146/0x178
[<0000000000549cf2>] _spin_lock+0x5a/0x98
[<000003e001280404>] __ap_poll_device+0x40/0x3e8 [ap]
[<000003e001280afe>] ap_poll_all+0xaa/0x1a4 [ap]
[<000000000014fa82>] tasklet_action+0xfe/0x1f4
[<0000000000150a56>] __do_softirq+0x116/0x284
[<0000000000111058>] do_softirq+0xe4/0xe8
[<00000000001504ba>] irq_exit+0xba/0xd8
[<00000000003dd04a>] do_IRQ+0x176/0x1fc
[<000000000011823c>] io_return+0x0/0x8
[<0000004bfbfd2c0e>] 0x4bfbfd2c0e
Signed-off-by: Felix Beck <felix.beck@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/drivers/s390/crypto/ap_bus.c b/drivers/s390/crypto/ap_bus.c
index ae9ab24..8578580 100644
--- a/drivers/s390/crypto/ap_bus.c
+++ b/drivers/s390/crypto/ap_bus.c
@@ -648,7 +648,9 @@
/* 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 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 @@
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 @@
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);
}