PCI: make msi_free_irqs() to use msix_mask_irq() instead of open coded write

Use msix_mask_irq() instead of direct use of writel, so as not to clear
preserved bits in the Vector Control register [31:1].

Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

1 files changed, 1 insertions, 4 deletions

diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index 944e45e4a84f..d9f06fbfa0bf 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -653,10 +653,7 @@ static int msi_free_irqs(struct pci_dev* dev)
 
         list_for_each_entry_safe(entry, tmp, &dev->msi_list, list) {
                 if (entry->msi_attrib.is_msix) {
-                        writel(1, entry->mask_base + entry->msi_attrib.entry_nr
-                                  * PCI_MSIX_ENTRY_SIZE
-                                  + PCI_MSIX_ENTRY_VECTOR_CTRL_OFFSET);
-
+                        msix_mask_irq(entry, 1);
                         if (list_is_last(&entry->list, &dev->msi_list))
                                 iounmap(entry->mask_base);
                 }