From: Jia-Ju Bai Date: Mon, 4 Jan 2016 08:14:29 +0000 (+0800) Subject: ehci-hcd: Disable memory-write-invalidate when the driver is removed X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=e3e2e36c106a1e4212c65ba5b5d2bcb3455cb354;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git ehci-hcd: Disable memory-write-invalidate when the driver is removed 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 Acked-by: Alan Stern Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/usb/host/ehci-pci.c b/drivers/usb/host/ehci-pci.c index 2a5d2fd76040..3b3649d88c5f 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