Hello,
Under kexec, I/OAT initialization breaks over busy resources
because the previous kernel did not release them.
I'm not sure this fix can be considered a complete one but
it works for me. I guess something similar to the *_remove
method should occur there..
Signed-off-by: Dan Aloni <[email protected]>
diff --git a/drivers/dma/ioatdma.c b/drivers/dma/ioatdma.c
index 8e87261..9a50701 100644
--- a/drivers/dma/ioatdma.c
+++ b/drivers/dma/ioatdma.c
@@ -42,6 +42,7 @@ #define to_ioat_desc(lh) container_of(lh
/* internal functions */
static int __devinit ioat_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
+static void ioat_shutdown(struct pci_dev *pdev);
static void __devexit ioat_remove(struct pci_dev *pdev);
static int enumerate_dma_channels(struct ioat_device *device)
@@ -560,6 +561,7 @@ static struct pci_driver ioat_pci_drv =
.name = "ioatdma",
.id_table = ioat_pci_tbl,
.probe = ioat_probe,
+ .shutdown = ioat_shutdown,
.remove = __devexit_p(ioat_remove),
};
@@ -787,9 +789,20 @@ err_request_regions:
err_set_dma_mask:
pci_disable_device(pdev);
err_enable_device:
+
+ printk(KERN_ERR "Intel(R) I/OAT DMA Engine initialization failed\n");
+
return err;
}
+static void ioat_shutdown(struct pci_dev *pdev)
+{
+ struct ioat_device *device;
+ device = pci_get_drvdata(pdev);
+
+ dma_async_device_unregister(&device->common);
+}
+
static void __devexit ioat_remove(struct pci_dev *pdev)
{
struct ioat_device *device;
--
Dan Aloni
XIV LTD, http://www.xivstorage.com
da-x (at) monatomic.org, dan (at) xiv.co.il
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