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| author | Yijing Wang <wangyijing@huawei.com> | 2014-07-08 10:08:55 +0800 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2014-07-16 14:44:49 -0600 |
| commit | a281b788d6070526c63b7bbc43dcbe5906d3f487 (patch) | |
| tree | 8303336b293b9746072f8e5b8aa4574c95ca4a7e /drivers/pci/msi.c | |
| parent | 4cc901613bd79dfa22d8aea996c2e9f74c04f8f2 (diff) | |
| download | linux-a281b788d6070526c63b7bbc43dcbe5906d3f487.tar.gz linux-a281b788d6070526c63b7bbc43dcbe5906d3f487.tar.bz2 linux-a281b788d6070526c63b7bbc43dcbe5906d3f487.zip | |
PCI/MSI: Retrieve first MSI IRQ from msi_desc rather than pci_dev
Retrieve the first MSI IRQ to compute the MSI index from struct msi_desc
rather than the struct pci_dev to avoid an additional memory access.
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/pci/msi.c')
| -rw-r--r-- | drivers/pci/msi.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c index dd0a259e3aaa..5bb99213f55d 100644 --- a/drivers/pci/msi.c +++ b/drivers/pci/msi.c @@ -235,7 +235,7 @@ static void msi_set_mask_bit(struct irq_data *data, u32 flag) msix_mask_irq(desc, flag); readl(desc->mask_base); /* Flush write to device */ } else { - unsigned offset = data->irq - desc->dev->irq; + unsigned offset = data->irq - desc->irq; msi_mask_irq(desc, 1 << offset, flag << offset); } } |