MSI: Use correct data offset for 32-bit MSI in read_msi_msg()

While reading the MSI code trying to find a reason why MSI wouldn't
work for devices that have a 32-bit MSI address capability, I noticed
that read_msi_msg() seems to read the message data from the wrong
offset in this case.

Signed-off-by: Roland Dreier <roland@digitalvampire.org>
Acked-by: Eric W. Biederman <ebiederm@xmission.com>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index be1df85e5e2d..87e01615053d 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -132,7 +132,7 @@ void read_msi_msg(unsigned int irq, struct msi_msg *msg)
                         pci_read_config_word(dev, msi_data_reg(pos, 1), &data);
                 } else {
                         msg->address_hi = 0;
-                        pci_read_config_word(dev, msi_data_reg(pos, 1), &data);
+                        pci_read_config_word(dev, msi_data_reg(pos, 0), &data);
                 }
                 msg->data = data;
                 break;