[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>
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1 changed files with 6 additions and 2 deletions
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@ -648,7 +648,9 @@ static int ap_bus_suspend(struct device *dev, pm_message_t state)
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/* Poll on the device until all requests are finished. */
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do {
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flags = 0;
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spin_lock_bh(&ap_dev->lock);
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__ap_poll_device(ap_dev, &flags);
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spin_unlock_bh(&ap_dev->lock);
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} while ((flags & 1) || (flags & 2));
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ap_device_remove(dev);
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@ -1407,14 +1409,12 @@ static void ap_reset(struct ap_device *ap_dev)
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static int __ap_poll_device(struct ap_device *ap_dev, unsigned long *flags)
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{
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spin_lock(&ap_dev->lock);
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if (!ap_dev->unregistered) {
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if (ap_poll_queue(ap_dev, flags))
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ap_dev->unregistered = 1;
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if (ap_dev->reset == AP_RESET_DO)
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ap_reset(ap_dev);
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}
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spin_unlock(&ap_dev->lock);
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return 0;
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}
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@ -1441,7 +1441,9 @@ static void ap_poll_all(unsigned long dummy)
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flags = 0;
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spin_lock(&ap_device_list_lock);
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list_for_each_entry(ap_dev, &ap_device_list, list) {
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spin_lock(&ap_dev->lock);
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__ap_poll_device(ap_dev, &flags);
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spin_unlock(&ap_dev->lock);
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}
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spin_unlock(&ap_device_list_lock);
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} while (flags & 1);
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@ -1487,7 +1489,9 @@ static int ap_poll_thread(void *data)
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flags = 0;
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spin_lock_bh(&ap_device_list_lock);
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list_for_each_entry(ap_dev, &ap_device_list, list) {
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spin_lock(&ap_dev->lock);
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__ap_poll_device(ap_dev, &flags);
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spin_unlock(&ap_dev->lock);
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}
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spin_unlock_bh(&ap_device_list_lock);
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}
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