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path: root/drivers/dma
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Diffstat (limited to 'drivers/dma')
-rw-r--r--drivers/dma/ioat.c92
1 files changed, 34 insertions, 58 deletions
diff --git a/drivers/dma/ioat.c b/drivers/dma/ioat.c
index 9b16a3af9a0a..4105d6575b64 100644
--- a/drivers/dma/ioat.c
+++ b/drivers/dma/ioat.c
@@ -75,60 +75,10 @@ static int ioat_dca_enabled = 1;
module_param(ioat_dca_enabled, int, 0644);
MODULE_PARM_DESC(ioat_dca_enabled, "control support of dca service (default: 1)");
-static int ioat_setup_functionality(struct pci_dev *pdev, void __iomem *iobase)
-{
- struct ioat_device *device = pci_get_drvdata(pdev);
- u8 version;
- int err = 0;
-
- version = readb(iobase + IOAT_VER_OFFSET);
- switch (version) {
- case IOAT_VER_1_2:
- device->dma = ioat_dma_probe(pdev, iobase);
- if (device->dma && ioat_dca_enabled)
- device->dca = ioat_dca_init(pdev, iobase);
- break;
- case IOAT_VER_2_0:
- device->dma = ioat_dma_probe(pdev, iobase);
- if (device->dma && ioat_dca_enabled)
- device->dca = ioat2_dca_init(pdev, iobase);
- break;
- case IOAT_VER_3_0:
- device->dma = ioat_dma_probe(pdev, iobase);
- if (device->dma && ioat_dca_enabled)
- device->dca = ioat3_dca_init(pdev, iobase);
- break;
- default:
- err = -ENODEV;
- break;
- }
- if (!device->dma)
- err = -ENODEV;
- return err;
-}
-
-static void ioat_shutdown_functionality(struct pci_dev *pdev)
-{
- struct ioat_device *device = pci_get_drvdata(pdev);
-
- dev_err(&pdev->dev, "Removing dma and dca services\n");
- if (device->dca) {
- unregister_dca_provider(device->dca);
- free_dca_provider(device->dca);
- device->dca = NULL;
- }
-
- if (device->dma) {
- ioat_dma_remove(device->dma);
- device->dma = NULL;
- }
-}
-
static struct pci_driver ioat_pci_driver = {
.name = "ioatdma",
.id_table = ioat_pci_tbl,
.probe = ioat_probe,
- .shutdown = ioat_shutdown_functionality,
.remove = __devexit_p(ioat_remove),
};
@@ -179,7 +129,29 @@ static int __devinit ioat_probe(struct pci_dev *pdev,
pci_set_master(pdev);
- err = ioat_setup_functionality(pdev, iobase);
+ switch (readb(iobase + IOAT_VER_OFFSET)) {
+ case IOAT_VER_1_2:
+ device->dma = ioat_dma_probe(pdev, iobase);
+ if (device->dma && ioat_dca_enabled)
+ device->dca = ioat_dca_init(pdev, iobase);
+ break;
+ case IOAT_VER_2_0:
+ device->dma = ioat_dma_probe(pdev, iobase);
+ if (device->dma && ioat_dca_enabled)
+ device->dca = ioat2_dca_init(pdev, iobase);
+ break;
+ case IOAT_VER_3_0:
+ device->dma = ioat_dma_probe(pdev, iobase);
+ if (device->dma && ioat_dca_enabled)
+ device->dca = ioat3_dca_init(pdev, iobase);
+ break;
+ default:
+ err = -ENODEV;
+ break;
+ }
+ if (!device->dma)
+ err = -ENODEV;
+
if (err)
goto err_version;
@@ -198,17 +170,21 @@ err_enable_device:
return err;
}
-/*
- * It is unsafe to remove this module: if removed while a requested
- * dma is outstanding, esp. from tcp, it is possible to hang while
- * waiting for something that will never finish. However, if you're
- * feeling lucky, this usually works just fine.
- */
static void __devexit ioat_remove(struct pci_dev *pdev)
{
struct ioat_device *device = pci_get_drvdata(pdev);
- ioat_shutdown_functionality(pdev);
+ dev_err(&pdev->dev, "Removing dma and dca services\n");
+ if (device->dca) {
+ unregister_dca_provider(device->dca);
+ free_dca_provider(device->dca);
+ device->dca = NULL;
+ }
+
+ if (device->dma) {
+ ioat_dma_remove(device->dma);
+ device->dma = NULL;
+ }
kfree(device);
}