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| author | Jia-Ju Bai <baijiaju1990@163.com> | 2016-01-04 09:14:29 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-01-25 05:51:34 +0100 |
| commit | e3e2e36c106a1e4212c65ba5b5d2bcb3455cb354 (patch) | |
| tree | 1d83057e3a7220ed224503dc24cecd93cd9aff94 /drivers/usb | |
| parent | ehci-hcd: Cleanup memory resources when ehci_halt fails (diff) | |
| download | linux-e3e2e36c106a1e4212c65ba5b5d2bcb3455cb354.tar.xz linux-e3e2e36c106a1e4212c65ba5b5d2bcb3455cb354.zip | |
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 <baijiaju1990@163.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/host/ehci-pci.c | 8 |
1 files changed, 7 insertions, 1 deletions
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 |