We had cached the MSI msg in __write_msi_msg(),
so we should retrieve the cached MSI msg directly,
not to access the MSI address/data hardware registers
again.
Signed-off-by: Yijing Wang <wangyijing@xxxxxxxxxx>
CC: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
CC: xen-devel@xxxxxxxxxxxxxxxxxxxx
---
arch/x86/pci/xen.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/arch/x86/pci/xen.c b/arch/x86/pci/xen.c
index 4656099..7a74404 100644
--- a/arch/x86/pci/xen.c
+++ b/arch/x86/pci/xen.c
@@ -228,7 +228,7 @@ static int xen_hvm_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
return 1;
list_for_each_entry(msidesc, &dev->msi_list, list) {
- read_msi_msg(msidesc, &msg);
+ get_cached_msi_msg(msidesc, &msg);
pirq = MSI_ADDR_EXT_DEST_ID(msg.address_hi) |
((msg.address_lo >> MSI_ADDR_DEST_ID_SHIFT) & 0xff);
if (msg.data != XEN_PIRQ_MSI_DATA ||
--
1.7.1
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