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authorVivek Mahajan <vivek.mahajan@freescale.com>2009-11-16 11:49:22 +0530
committerJeff Garzik <jgarzik@redhat.com>2009-12-03 02:46:34 -0500
commitdae77214fa71898b84514e43721fb7bf260b026a (patch)
treef439185a2b1ffe3f481ec0ae1409c0c208e540e7 /drivers/ata/sata_sil24.c
parent097dac91837b35947fffb0e303bcf71e4e4a789f (diff)
sata_sil24: MSI support, disabled by default
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@freescale.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Diffstat (limited to 'drivers/ata/sata_sil24.c')
-rw-r--r--drivers/ata/sata_sil24.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/ata/sata_sil24.c b/drivers/ata/sata_sil24.c
index e6946fc527d..1370df6c420 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);