diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2016-09-26 15:47:03 -0400 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2016-09-26 15:47:03 -0400 |
| commit | 1e1b37273cf719545da50b76f214f983a710aaf4 (patch) | |
| tree | 033f6062325ef7aaeefe8559bb409ab7d2be3c76 /arch/x86/pci/vmd.c | |
| parent | c183a603e8d8a5a189729b77d0c623a3d5950e5f (diff) | |
| parent | c291b015158577be533dd5a959dfc09bab119eed (diff) | |
Merge branch 'x86/urgent' into x86/apic
Bring in the upstream modifications so we can fixup the silent merge
conflict which is introduced by this merge.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/pci/vmd.c')
| -rw-r--r-- | arch/x86/pci/vmd.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/arch/x86/pci/vmd.c b/arch/x86/pci/vmd.c index b814ca675131..7948be342ee9 100644 --- a/arch/x86/pci/vmd.c +++ b/arch/x86/pci/vmd.c @@ -41,6 +41,7 @@ static DEFINE_RAW_SPINLOCK(list_lock); * @node: list item for parent traversal. * @rcu: RCU callback item for freeing. * @irq: back pointer to parent. + * @enabled: true if driver enabled IRQ * @virq: the virtual IRQ value provided to the requesting driver. * * Every MSI/MSI-X IRQ requested for a device in a VMD domain will be mapped to @@ -50,6 +51,7 @@ struct vmd_irq { struct list_head node; struct rcu_head rcu; struct vmd_irq_list *irq; + bool enabled; unsigned int virq; }; @@ -122,7 +124,9 @@ static void vmd_irq_enable(struct irq_data *data) unsigned long flags; raw_spin_lock_irqsave(&list_lock, flags); + WARN_ON(vmdirq->enabled); list_add_tail_rcu(&vmdirq->node, &vmdirq->irq->irq_list); + vmdirq->enabled = true; raw_spin_unlock_irqrestore(&list_lock, flags); data->chip->irq_unmask(data); @@ -136,8 +140,10 @@ static void vmd_irq_disable(struct irq_data *data) data->chip->irq_mask(data); raw_spin_lock_irqsave(&list_lock, flags); - list_del_rcu(&vmdirq->node); - INIT_LIST_HEAD_RCU(&vmdirq->node); + if (vmdirq->enabled) { + list_del_rcu(&vmdirq->node); + vmdirq->enabled = false; + } raw_spin_unlock_irqrestore(&list_lock, flags); } |