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authorMichael Ellerman <michael@ellerman.id.au>2007-04-18 19:39:21 +1000
committerGreg Kroah-Hartman <gregkh@suse.de>2007-05-02 19:02:38 -0700
commit7fe3730de729b758e9f69b862b9255d998671b5f (patch)
tree2fc0cf3a003aaf6e8c257a32b748941e3eec93b2 /drivers/pci
parentf282b97021ddc95c6092b9016f667c0963858fb1 (diff)
downloadop-kernel-dev-7fe3730de729b758e9f69b862b9255d998671b5f.zip
op-kernel-dev-7fe3730de729b758e9f69b862b9255d998671b5f.tar.gz
MSI: arch must connect the irq and the msi_desc
set_irq_msi() currently connects an irq_desc to an msi_desc. The archs call it at some point in their setup routine, and then the generic code sets up the reverse mapping from the msi_desc back to the irq. set_irq_msi() should do both connections, making it the one and only call required to connect an irq with it's MSI desc and vice versa. The arch code MUST call set_irq_msi(), and it must do so only once it's sure it's not going to fail the irq allocation. Given that there's no need for the arch to return the irq anymore, the return value from the arch setup routine just becomes 0 for success and anything else for failure. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/pci')
-rw-r--r--drivers/pci/msi.c23
1 files changed, 9 insertions, 14 deletions
diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index 7a44ba4..88362f1 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -297,7 +297,7 @@ void pci_restore_msi_state(struct pci_dev *dev)
static int msi_capability_init(struct pci_dev *dev)
{
struct msi_desc *entry;
- int pos, irq;
+ int pos, ret;
u16 control;
msi_set_enable(dev, 0); /* Ensure msi is disabled as I set it up */
@@ -335,21 +335,19 @@ static int msi_capability_init(struct pci_dev *dev)
maskbits);
}
/* Configure MSI capability structure */
- irq = arch_setup_msi_irq(dev, entry);
- if (irq < 0) {
+ ret = arch_setup_msi_irq(dev, entry);
+ if (ret) {
kfree(entry);
- return irq;
+ return ret;
}
- entry->irq = irq;
list_add(&entry->list, &dev->msi_list);
- set_irq_msi(irq, entry);
/* Set MSI enabled bits */
pci_intx(dev, 0); /* disable intx */
msi_set_enable(dev, 1);
dev->msi_enabled = 1;
- dev->irq = irq;
+ dev->irq = entry->irq;
return 0;
}
@@ -367,7 +365,7 @@ static int msix_capability_init(struct pci_dev *dev,
struct msix_entry *entries, int nvec)
{
struct msi_desc *entry;
- int irq, pos, i, j, nr_entries;
+ int irq, pos, i, j, nr_entries, ret;
unsigned long phys_addr;
u32 table_offset;
u16 control;
@@ -407,16 +405,13 @@ static int msix_capability_init(struct pci_dev *dev,
entry->mask_base = base;
/* Configure MSI-X capability structure */
- irq = arch_setup_msi_irq(dev, entry);
- if (irq < 0) {
+ ret = arch_setup_msi_irq(dev, entry);
+ if (ret) {
kfree(entry);
break;
}
- entry->irq = irq;
- entries[i].vector = irq;
+ entries[i].vector = entry->irq;
list_add(&entry->list, &dev->msi_list);
-
- set_irq_msi(irq, entry);
}
if (i != nvec) {
int avail = i - 1;
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