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PCI/AER: Use list_first_entry_or_null() to simplify code

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Use list_first_entry_or_null() instead of list_empty() + list_entry() to
simplify the code.

Signed-off-by: Geliang Tang <geliangtang@163.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Geliang Tang 2016-01-22 22:50:19 +08:00 committed by Bjorn Helgaas
parent 7e8fbdc628
commit 0e6053dc6e
1 changed files with 5 additions and 8 deletions
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13
drivers/pci/pcie/aer/aer_inject.c
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@ -124,16 +124,13 @@ static struct pci_ops *__find_pci_bus_ops(struct pci_bus *bus)
static struct pci_bus_ops *pci_bus_ops_pop(void)
{
unsigned long flags;
struct pci_bus_ops *bus_ops = NULL;
struct pci_bus_ops *bus_ops;
spin_lock_irqsave(&inject_lock, flags);
if (list_empty(&pci_bus_ops_list))
bus_ops = NULL;
else {
struct list_head *lh = pci_bus_ops_list.next;
list_del(lh);
bus_ops = list_entry(lh, struct pci_bus_ops, list);
}
bus_ops = list_first_entry_or_null(&pci_bus_ops_list,
struct pci_bus_ops, list);
if (bus_ops)
list_del(&bus_ops->list);
spin_unlock_irqrestore(&inject_lock, flags);
return bus_ops;
}