diff options
author | David S. Miller <davem@davemloft.net> | 2016-08-30 04:54:02 (GMT) |
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committer | David S. Miller <davem@davemloft.net> | 2016-08-30 04:54:02 (GMT) |
commit | 6abdd5f5935fff978f950561f3c5175eb34dad73 (patch) | |
tree | 6f3ed3a4f4af9e74436ec9355ebf8201357f1c40 /arch/x86/pci/vmd.c | |
parent | 0b498a52778368ff501557d68c7b50878ab1701e (diff) | |
parent | e4e98c460ad38c78498622a164fd5ef09a2dc9cb (diff) | |
download | linux-6abdd5f5935fff978f950561f3c5175eb34dad73.tar.xz |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
All three conflicts were cases of simple overlapping
changes.
Signed-off-by: David S. Miller <davem@davemloft.net>
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 b814ca6..7948be3 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); } |