The driver calls pci_set_mwi to enable memory-write-invalidate when it
is initialized, but does not call pci_clear_mwi when it is removed. Many
other drivers calls pci_clear_mwi when pci_set_mwi is called, such as
r8169, 8139cp and e1000.
This patch adds a function "ehci_pci_remove" to remove the pci driver.
This function calls pci_clear_mwi and usb_hcd_pci_remove, which can
fix the problem.
Signed-off-by: Jia-Ju Bai <baijiaju1990@xxxxxxx>
---
drivers/usb/host/ehci-pci.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/host/ehci-pci.c b/drivers/usb/host/ehci-pci.c
index 2a5d2fd..3b3649d 100644
--- a/drivers/usb/host/ehci-pci.c
+++ b/drivers/usb/host/ehci-pci.c
@@ -377,6 +377,12 @@ static int ehci_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
return usb_hcd_pci_probe(pdev, id);
}
+static void ehci_pci_remove(struct pci_dev *pdev)
+{
+ pci_clear_mwi(pdev);
+ usb_hcd_pci_remove(pdev);
+}
+
/* PCI driver selection metadata; PCI hotplugging uses this */
static const struct pci_device_id pci_ids [] = { {
/* handle any USB 2.0 EHCI controller */
@@ -396,7 +402,7 @@ static struct pci_driver ehci_pci_driver = {
.id_table = pci_ids,
.probe = ehci_pci_probe,
- .remove = usb_hcd_pci_remove,
+ .remove = ehci_pci_remove,
.shutdown = usb_hcd_pci_shutdown,
#ifdef CONFIG_PM
--
1.7.9.5
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