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Subject[PATCH 9/9] I/OAT: fix I/OAT for kexec
Date
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 <da-x@monatomic.org>
Signed-off-by: Chris Leech <christopher.leech@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

drivers/dma/ioatdma.c | 13 +++++++++++++
1 files changed, 13 insertions(+), 0 deletions(-)

diff --git a/drivers/dma/ioatdma.c b/drivers/dma/ioatdma.c
index cbf93ca..1d259e5 100644
--- a/drivers/dma/ioatdma.c
+++ b/drivers/dma/ioatdma.c
@@ -41,6 +41,7 @@

/* 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)
@@ -557,6 +558,7 @@ 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),
};

@@ -781,9 +783,20 @@ 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;
-
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