[PATCH 1/1] ata/sata_sil24: MSI support, disabled by default
From: Vivek Mahajan <hidden>
Date: 2009-11-16 06:19:45
Also in:
linux-ide
Subsystem:
libata subsystem (serial and parallel ata drivers), the rest · Maintainers:
Damien Le Moal, Niklas Cassel, Linus Torvalds
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 <redacted> --- 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