fix I/OAT for kexec
Subsystems (2)
PATCH 1/1 fix I/OAT for kexec
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]>
drivers/dma/ioatdma.c +13 -0
@@ -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;
Signature · 3 lines
Dan Aloni XIV LTD, http://www.xivstorage.com da-x (at) monatomic.org, dan (at) xiv.co.il