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[4/5] PCI/MSI: Retrieve first MSI irq from msi_desc rather than pci_dev

Message ID 1404461814-9936-1-git-send-email-wangyijing@huawei.com
State Superseded
Headers show

Commit Message

Yijing Wang July 4, 2014, 8:16 a.m. UTC 
Retrieve the first MSi irq to compute the MSI index from
struct msi_desc rather than the pci device, avoid a additional
memory access.

Signed-off-by: Yijing Wang <wangyijing@huawei.com>
---
 drivers/pci/msi.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
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Patch

diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index 86578bb..7f803e9 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);
 	}
 }