The following patch adds MSI support. Some platforms
may have broken MSI, so those are defaulted to use
legacy PCI interrupts.
Signed-off-by: Vivek Mahajan <vivek.mahajan@xxxxxxxxxxxxx>
---
drivers/ata/sata_sil24.c | 9 +++++++++
1 files changed, 9 insertions(+), 0 deletions(-)
diff --git a/drivers/ata/sata_sil24.c b/drivers/ata/sata_sil24.c
index e6946fc..1370df6 100644
--- a/drivers/ata/sata_sil24.c
+++ b/drivers/ata/sata_sil24.c
@@ -417,6 +417,10 @@ static struct ata_port_operations sil24_ops = {
#endif
};
+static int sata_sil24_msi; /* Disable MSI */
+module_param_named(msi, sata_sil24_msi, bool, S_IRUGO);
+MODULE_PARM_DESC(msi, "Enable MSI (Default: false)");
+
/*
* Use bits 30-31 of port_flags to encode available port numbers.
* Current maxium is 4.
@@ -1340,6 +1344,11 @@ static int sil24_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
sil24_init_controller(host);
+ if (sata_sil24_msi && !pci_enable_msi(pdev)) {
+ dev_printk(KERN_INFO, &pdev->dev, "Using MSI\n");
+ pci_intx(pdev, 0);
+ }
+
pci_set_master(pdev);
return ata_host_activate(host, pdev->irq, sil24_interrupt, IRQF_SHARED,
&sil24_sht);
--
1.5.6.5
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