On Tue, Jun 16, 2009 at 04:26:58PM +0900, Kenji Kaneshige wrote:
> Remove __msi_set_enable() because it's used only by msi_set_enable().
>
> Signed-off-by: Kenji Kaneshige <kaneshige.kenji@xxxxxxxxxxxxxx>
That's certainly one option. How about this one though?
----
We have the 'pos' of the MSI capability at all locations which call
msi_set_enable(), so pass it to msi_set_enable() instead of making it
find the capability every time.
Signed-off-by: Matthew Wilcox <willy@xxxxxxxxxxxxxxx>
diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index 3627732..10ad6e5 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -75,22 +75,17 @@ void arch_teardown_msi_irqs(struct pci_dev *dev)
}
#endif
-static void __msi_set_enable(struct pci_dev *dev, int pos, int enable)
+static void msi_set_enable(struct pci_dev *dev, int pos, int enable)
{
u16 control;
- if (pos) {
- pci_read_config_word(dev, pos + PCI_MSI_FLAGS, &control);
- control &= ~PCI_MSI_FLAGS_ENABLE;
- if (enable)
- control |= PCI_MSI_FLAGS_ENABLE;
- pci_write_config_word(dev, pos + PCI_MSI_FLAGS, control);
- }
-}
+ BUG_ON(!pos);
-static void msi_set_enable(struct pci_dev *dev, int enable)
-{
- __msi_set_enable(dev, pci_find_capability(dev, PCI_CAP_ID_MSI), enable);
+ pci_read_config_word(dev, pos + PCI_MSI_FLAGS, &control);
+ control &= ~PCI_MSI_FLAGS_ENABLE;
+ if (enable)
+ control |= PCI_MSI_FLAGS_ENABLE;
+ pci_write_config_word(dev, pos + PCI_MSI_FLAGS, control);
}
static void msix_set_enable(struct pci_dev *dev, int enable)
@@ -303,7 +298,7 @@ static void __pci_restore_msi_state(struct pci_dev *dev)
pos = entry->msi_attrib.pos;
pci_intx_for_msi(dev, 0);
- msi_set_enable(dev, 0);
+ msi_set_enable(dev, pos, 0);
write_msi_msg(dev->irq, &entry->msg);
pci_read_config_word(dev, pos + PCI_MSI_FLAGS, &control);
@@ -365,9 +360,9 @@ static int msi_capability_init(struct pci_dev *dev, int nvec)
u16 control;
unsigned mask;
- msi_set_enable(dev, 0); /* Ensure msi is disabled as I set it up */
-
pos = pci_find_capability(dev, PCI_CAP_ID_MSI);
+ msi_set_enable(dev, pos, 0); /* Disable MSI during set up */
+
pci_read_config_word(dev, msi_control_reg(pos), &control);
/* MSI Entry Initialization */
entry = alloc_msi_entry(dev);
@@ -399,7 +394,7 @@ static int msi_capability_init(struct pci_dev *dev, int nvec)
/* Set MSI enabled bits */
pci_intx_for_msi(dev, 0);
- msi_set_enable(dev, 1);
+ msi_set_enable(dev, pos, 1);
dev->msi_enabled = 1;
dev->irq = entry->irq;
@@ -596,17 +591,20 @@ void pci_msi_shutdown(struct pci_dev *dev)
struct msi_desc *desc;
u32 mask;
u16 ctrl;
+ unsigned pos;
if (!pci_msi_enable || !dev || !dev->msi_enabled)
return;
- msi_set_enable(dev, 0);
+ BUG_ON(list_empty(&dev->msi_list));
+ desc = list_first_entry(&dev->msi_list, struct msi_desc, list);
+ pos = desc->msi_attrib.pos;
+
+ msi_set_enable(dev, pos, 0);
pci_intx_for_msi(dev, 1);
dev->msi_enabled = 0;
- BUG_ON(list_empty(&dev->msi_list));
- desc = list_first_entry(&dev->msi_list, struct msi_desc, list);
- pci_read_config_word(dev, desc->msi_attrib.pos + PCI_MSI_FLAGS, &ctrl);
+ pci_read_config_word(dev, pos + PCI_MSI_FLAGS, &ctrl);
mask = msi_capable_mask(ctrl);
msi_mask_irq(desc, mask, ~mask);
--
Matthew Wilcox Intel Open Source Technology Centre
"Bill, look, we understand that you're interested in selling us this
operating system, but compare it to ours. We can't possibly take such
a retrograde step."
--
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