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PCI/MSI: Remove "pos" from the struct msi_desc msi_attrib

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"msi_attrib.pos" is only used for MSI (not MSI-X), and we already cache the
MSI capability offset in "dev->msi_cap".

Remove "pos" from the struct msi_attrib and use "dev->msi_cap" directly.

[bhelgaas: changelog, fix whitespace]
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Yijing Wang 2014-09-23 11:02:42 -06:00 • committed by Bjorn Helgaas
commit 48c3c38f00
4 changed files with 4 additions and 10 deletions
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6
arch/mips/pci/msi-octeon.c
View file

@ -73,8 +73,7 @@ int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc)
* wants. Most devices only want 1, which will give
* configured_private_bits and request_private_bits equal 0.
*/
pci_read_config_word(dev, desc->msi_attrib.pos + PCI_MSI_FLAGS,
&control);
pci_read_config_word(dev, dev->msi_cap + PCI_MSI_FLAGS, &control);
/*
* If the number of private bits has been configured then use
@ -176,8 +175,7 @@ msi_irq_allocated:
/* Update the number of IRQs the device has available to it */
control &= ~PCI_MSI_FLAGS_QSIZE;
control |= request_private_bits << 4;
pci_write_config_word(dev, desc->msi_attrib.pos + PCI_MSI_FLAGS,
control);
pci_write_config_word(dev, dev->msi_cap + PCI_MSI_FLAGS, control);
irq_set_msi_desc(irq, desc);
write_msi_msg(irq, &msg);

5
drivers/pci/host/pcie-designware.c
View file

@ -355,9 +355,8 @@ static int dw_msi_setup_irq(struct msi_chip *chip, struct pci_dev *pdev,
return -EINVAL;
}
pci_read_config_word(pdev, desc->msi_attrib.pos+PCI_MSI_FLAGS,
&msg_ctr);
msgvec = (msg_ctr&PCI_MSI_FLAGS_QSIZE) >> 4;
pci_read_config_word(pdev, pdev->msi_cap + PCI_MSI_FLAGS, &msg_ctr);
msgvec = (msg_ctr & PCI_MSI_FLAGS_QSIZE) >> 4;
if (msgvec == 0)
msgvec = (msg_ctr & PCI_MSI_FLAGS_QMASK) >> 1;
if (msgvec > 5)

2
drivers/pci/msi.c
View file

@ -574,7 +574,6 @@ static struct msi_desc *msi_setup_entry(struct pci_dev *dev)
entry->msi_attrib.entry_nr = 0;
entry->msi_attrib.maskbit = !!(control & PCI_MSI_FLAGS_MASKBIT);
entry->msi_attrib.default_irq = dev->irq; /* Save IOAPIC IRQ */
entry->msi_attrib.pos = dev->msi_cap;
entry->msi_attrib.multi_cap = (control & PCI_MSI_FLAGS_QMASK) >> 1;
if (control & PCI_MSI_FLAGS_64BIT)
@ -678,7 +677,6 @@ static int msix_setup_entries(struct pci_dev *dev, void __iomem *base,
entry->msi_attrib.is_64 = 1;
entry->msi_attrib.entry_nr = entries[i].entry;
entry->msi_attrib.default_irq = dev->irq;
entry->msi_attrib.pos = dev->msix_cap;
entry->mask_base = base;
list_add_tail(&entry->list, &dev->msi_list);

1
include/linux/msi.h
View file

@ -29,7 +29,6 @@ struct msi_desc {
__u8 multi_cap : 3; /* log2 num of messages supported */
__u8 maskbit : 1; /* mask-pending bit supported ? */
__u8 is_64 : 1; /* Address size: 0=32bit 1=64bit */
__u8 pos; /* Location of the msi capability */
__u16 entry_nr; /* specific enabled entry */
unsigned default_irq; /* default pre-assigned irq */
} msi_attrib;