diff options
Diffstat (limited to 'drivers/pci/msi.c')
| -rw-r--r-- | drivers/pci/msi.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c index 435c1958a7b..a4ef93ea4c5 100644 --- a/drivers/pci/msi.c +++ b/drivers/pci/msi.c @@ -68,6 +68,29 @@ static void msix_set_enable(struct pci_dev *dev, int enable) } } +static void msix_flush_writes(unsigned int irq) +{ + struct msi_desc *entry; + + entry = get_irq_msi(irq); + BUG_ON(!entry || !entry->dev); + switch (entry->msi_attrib.type) { + case PCI_CAP_ID_MSI: + /* nothing to do */ + break; + case PCI_CAP_ID_MSIX: + { + int offset = entry->msi_attrib.entry_nr * PCI_MSIX_ENTRY_SIZE + + PCI_MSIX_ENTRY_VECTOR_CTRL_OFFSET; + readl(entry->mask_base + offset); + break; + } + default: + BUG(); + break; + } +} + static void msi_set_mask_bit(unsigned int irq, int flag) { struct msi_desc *entry; @@ -187,11 +210,13 @@ void write_msi_msg(unsigned int irq, struct msi_msg *msg) void mask_msi_irq(unsigned int irq) { msi_set_mask_bit(irq, 1); + msix_flush_writes(irq); } void unmask_msi_irq(unsigned int irq) { msi_set_mask_bit(irq, 0); + msix_flush_writes(irq); } static int msi_free_irq(struct pci_dev* dev, int irq); |