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authorAlan Stern <stern@rowland.harvard.edu>2006-04-04 14:47:44 -0400
committerGreg Kroah-Hartman <gregkh@suse.de>2006-04-14 11:12:26 -0700
commit8e32640672bdcb01e0d83f087f09dd65fcbc3275 (patch)
tree8e65907cb076ae5598df469d120a8d4cece16800 /drivers/usb/host/uhci-hub.c
parent01e89506351b84ac6f39eb70f99c71483768ca60 (diff)
[PATCH] USB: UHCI: don't track suspended ports
Someone recently posted a bug report where it turned out that uhci-hcd was disagreeing with the UHCI controller over whether or not a port was suspended: The driver thought it wasn't and the hardware thought it was. This patch (as665) fixes the problem and simplifies the driver by removing the internal state-tracking completely. Now the driver just asks the hardware whether a port is suspended. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/host/uhci-hub.c')
-rw-r--r--drivers/usb/host/uhci-hub.c18
1 files changed, 9 insertions, 9 deletions
diff --git a/drivers/usb/host/uhci-hub.c b/drivers/usb/host/uhci-hub.c
index 152971d1676..c8451d9578f 100644
--- a/drivers/usb/host/uhci-hub.c
+++ b/drivers/usb/host/uhci-hub.c
@@ -85,11 +85,10 @@ static void uhci_finish_suspend(struct uhci_hcd *uhci, int port,
{
int status;
- if (test_bit(port, &uhci->suspended_ports)) {
+ if (inw(port_addr) & (USBPORTSC_SUSP | USBPORTSC_RD)) {
CLR_RH_PORTSTAT(USBPORTSC_SUSP | USBPORTSC_RD);
- clear_bit(port, &uhci->suspended_ports);
- clear_bit(port, &uhci->resuming_ports);
- set_bit(port, &uhci->port_c_suspend);
+ if (test_bit(port, &uhci->resuming_ports))
+ set_bit(port, &uhci->port_c_suspend);
/* The controller won't actually turn off the RD bit until
* it has had a chance to send a low-speed EOP sequence,
@@ -97,6 +96,7 @@ static void uhci_finish_suspend(struct uhci_hcd *uhci, int port,
* slightly longer for good luck. */
udelay(4);
}
+ clear_bit(port, &uhci->resuming_ports);
}
/* Wait for the UHCI controller in HP's iLO2 server management chip.
@@ -265,8 +265,6 @@ static int uhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
wPortChange |= USB_PORT_STAT_C_SUSPEND;
lstatus |= 1;
}
- if (test_bit(port, &uhci->suspended_ports))
- lstatus |= 2;
if (test_bit(port, &uhci->resuming_ports))
lstatus |= 4;
@@ -309,7 +307,6 @@ static int uhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
switch (wValue) {
case USB_PORT_FEAT_SUSPEND:
- set_bit(port, &uhci->suspended_ports);
SET_RH_PORTSTAT(USBPORTSC_SUSP);
OK(0);
case USB_PORT_FEAT_RESET:
@@ -343,8 +340,11 @@ static int uhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
CLR_RH_PORTSTAT(USBPORTSC_PEC);
OK(0);
case USB_PORT_FEAT_SUSPEND:
- if (test_bit(port, &uhci->suspended_ports) &&
- !test_and_set_bit(port,
+ if (!(inw(port_addr) & USBPORTSC_SUSP)) {
+
+ /* Make certain the port isn't suspended */
+ uhci_finish_suspend(uhci, port, port_addr);
+ } else if (!test_and_set_bit(port,
&uhci->resuming_ports)) {
SET_RH_PORTSTAT(USBPORTSC_RD);