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PCI/MSI: Use irq_get_msi_desc() to simplify code

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Use irq_get_msi_desc() to get MSI IRQ related msi_desc directly instead of
searching the dev->msi_list.

Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Yijing Wang 2014-07-08 10:09:19 +08:00 committed by Bjorn Helgaas
parent 0dae508aac
commit e11ece5a5e
1 changed files with 5 additions and 7 deletions
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12
drivers/pci/msi.c
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@ -487,7 +487,6 @@ EXPORT_SYMBOL_GPL(pci_restore_msi_state);
static ssize_t msi_mode_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct pci_dev *pdev = to_pci_dev(dev);
struct msi_desc *entry;
unsigned long irq;
int retval;
@ -496,12 +495,11 @@ static ssize_t msi_mode_show(struct device *dev, struct device_attribute *attr,
if (retval)
return retval;
list_for_each_entry(entry, &pdev->msi_list, list) {
if (entry->irq == irq) {
return sprintf(buf, "%s\n",
entry->msi_attrib.is_msix ? "msix" : "msi");
}
}
entry = irq_get_msi_desc(irq);
if (entry)
return sprintf(buf, "%s\n",
entry->msi_attrib.is_msix ? "msix" : "msi");
return -ENODEV;
}