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authorAlan Stern <stern@rowland.harvard.edu>2008-04-14 20:17:56 +0400
committerGreg Kroah-Hartman <gregkh@suse.de>2008-04-25 08:16:53 +0400
commite872154921a6b5256a3c412dd69158ac0b135176 (patch)
tree65c1ef7054d7c5ed3a94799e09db8036a7f9574c /drivers/usb/host/ohci-pci.c
parent5f47493cdf90b8afe5353e59de30e449e775ea8b (diff)
downloadlinux-e872154921a6b5256a3c412dd69158ac0b135176.tar.xz
USB: don't explicitly reenable root-hub status interrupts
This patch (as1069b) changes the way OHCI root-hub status-change interrupts are enabled. Currently a special HCD method, hub_irq_enable(), is called when the hub driver is finished using a root hub. This approach turns out to be subject to races, resulting in unnecessary polling. The patch does away with the method entirely. Instead, the driver automatically enables the RHSC interrupt when no more status changes are present. This scheme is safe with controllers using level-triggered semantics for their interrupt flags. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/host/ohci-pci.c')
-rw-r--r--drivers/usb/host/ohci-pci.c1
1 files changed, 0 insertions, 1 deletions
diff --git a/drivers/usb/host/ohci-pci.c b/drivers/usb/host/ohci-pci.c
index 4696cc912e16..3bf175d95a23 100644
--- a/drivers/usb/host/ohci-pci.c
+++ b/drivers/usb/host/ohci-pci.c
@@ -327,7 +327,6 @@ static const struct hc_driver ohci_pci_hc_driver = {
*/
.hub_status_data = ohci_hub_status_data,
.hub_control = ohci_hub_control,
- .hub_irq_enable = ohci_rhsc_enable,
#ifdef CONFIG_PM
.bus_suspend = ohci_bus_suspend,
.bus_resume = ohci_bus_resume,