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authorAlan Stern <stern@rowland.harvard.edu>2005-09-05 13:59:51 -0400
committerGreg Kroah-Hartman <gregkh@suse.de>2005-09-12 12:23:40 -0700
commit1f09df8bfe358994fcb5f3dc4f890694c4069621 (patch)
treeb9778e010d4f85780fcc44b76ab49dc05dfe85fb /drivers/usb/host/uhci-hcd.c
parentf1a15606d5be8490a122f1c94c554bd0f07d8d26 (diff)
[PATCH] USB UHCI: remove the FSBR kernel timer
This patch (as558) removes from the UHCI driver a kernel timer used for checking Full Speed Bandwidth Reclamation (FSBR). The checking can be done during normal root-hub polling; it doesn't need a separate timer. 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-hcd.c')
-rw-r--r--drivers/usb/host/uhci-hcd.c62
1 files changed, 22 insertions, 40 deletions
diff --git a/drivers/usb/host/uhci-hcd.c b/drivers/usb/host/uhci-hcd.c
index 0d5d2545bf07..0c024898cbea 100644
--- a/drivers/usb/host/uhci-hcd.c
+++ b/drivers/usb/host/uhci-hcd.c
@@ -97,14 +97,9 @@ static void uhci_get_current_frame_number(struct uhci_hcd *uhci);
/* to make sure it doesn't hog all of the bandwidth */
#define DEPTH_INTERVAL 5
-static inline void restart_timer(struct uhci_hcd *uhci)
-{
- mod_timer(&uhci->stall_timer, jiffies + msecs_to_jiffies(100));
-}
-
-#include "uhci-hub.c"
#include "uhci-debug.c"
#include "uhci-q.c"
+#include "uhci-hub.c"
/*
* Make sure the controller is completely inactive, unable to
@@ -160,7 +155,6 @@ static void hc_died(struct uhci_hcd *uhci)
{
reset_hc(uhci);
uhci->hc_inaccessible = 1;
- del_timer(&uhci->stall_timer);
}
/*
@@ -287,8 +281,11 @@ __acquires(uhci->lock)
/* Enable resume-detect interrupts if they work.
* Then enter Global Suspend mode, still configured.
*/
- int_enable = (resume_detect_interrupts_are_broken(uhci) ?
- 0 : USBINTR_RESUME);
+ uhci->working_RD = 1;
+ int_enable = USBINTR_RESUME;
+ if (resume_detect_interrupts_are_broken(uhci)) {
+ uhci->working_RD = int_enable = 0;
+ }
outw(int_enable, uhci->io_addr + USBINTR);
outw(USBCMD_EGSM | USBCMD_CF, uhci->io_addr + USBCMD);
mb();
@@ -315,7 +312,6 @@ __acquires(uhci->lock)
uhci->rh_state = new_state;
uhci->is_stopped = UHCI_IS_STOPPED;
- del_timer(&uhci->stall_timer);
uhci_to_hcd(uhci)->poll_rh = !int_enable;
uhci_scan_schedule(uhci, NULL);
@@ -335,7 +331,6 @@ static void start_rh(struct uhci_hcd *uhci)
mb();
uhci->rh_state = UHCI_RH_RUNNING;
uhci_to_hcd(uhci)->poll_rh = 1;
- restart_timer(uhci);
}
static void wakeup_rh(struct uhci_hcd *uhci)
@@ -374,20 +369,6 @@ __acquires(uhci->lock)
mod_timer(&uhci_to_hcd(uhci)->rh_timer, jiffies);
}
-static void stall_callback(unsigned long _uhci)
-{
- struct uhci_hcd *uhci = (struct uhci_hcd *) _uhci;
- unsigned long flags;
-
- spin_lock_irqsave(&uhci->lock, flags);
- uhci_scan_schedule(uhci, NULL);
- check_fsbr(uhci);
-
- if (!uhci->is_stopped)
- restart_timer(uhci);
- spin_unlock_irqrestore(&uhci->lock, flags);
-}
-
static irqreturn_t uhci_irq(struct usb_hcd *hcd, struct pt_regs *regs)
{
struct uhci_hcd *uhci = hcd_to_uhci(hcd);
@@ -418,8 +399,10 @@ static irqreturn_t uhci_irq(struct usb_hcd *hcd, struct pt_regs *regs)
"host controller halted, "
"very bad!\n");
hc_died(uhci);
- spin_unlock_irqrestore(&uhci->lock, flags);
- return IRQ_HANDLED;
+
+ /* Force a callback in case there are
+ * pending unlinks */
+ mod_timer(&hcd->rh_timer, jiffies);
}
spin_unlock_irqrestore(&uhci->lock, flags);
}
@@ -427,10 +410,11 @@ static irqreturn_t uhci_irq(struct usb_hcd *hcd, struct pt_regs *regs)
if (status & USBSTS_RD)
usb_hcd_poll_rh_status(hcd);
-
- spin_lock_irqsave(&uhci->lock, flags);
- uhci_scan_schedule(uhci, regs);
- spin_unlock_irqrestore(&uhci->lock, flags);
+ else {
+ spin_lock_irqsave(&uhci->lock, flags);
+ uhci_scan_schedule(uhci, regs);
+ spin_unlock_irqrestore(&uhci->lock, flags);
+ }
return IRQ_HANDLED;
}
@@ -595,10 +579,6 @@ static int uhci_start(struct usb_hcd *hcd)
init_waitqueue_head(&uhci->waitqh);
- init_timer(&uhci->stall_timer);
- uhci->stall_timer.function = stall_callback;
- uhci->stall_timer.data = (unsigned long) uhci;
-
uhci->fl = dma_alloc_coherent(uhci_dev(uhci), sizeof(*uhci->fl),
&dma_handle, 0);
if (!uhci->fl) {
@@ -745,11 +725,11 @@ static void uhci_stop(struct usb_hcd *hcd)
struct uhci_hcd *uhci = hcd_to_uhci(hcd);
spin_lock_irq(&uhci->lock);
- reset_hc(uhci);
+ if (!uhci->hc_inaccessible)
+ reset_hc(uhci);
uhci_scan_schedule(uhci, NULL);
spin_unlock_irq(&uhci->lock);
- del_timer_sync(&uhci->stall_timer);
release_uhci(uhci);
}
@@ -811,13 +791,12 @@ static int uhci_suspend(struct usb_hcd *hcd, pm_message_t message)
*/
pci_write_config_word(to_pci_dev(uhci_dev(uhci)), USBLEGSUP, 0);
uhci->hc_inaccessible = 1;
+ hcd->poll_rh = 0;
/* FIXME: Enable non-PME# remote wakeup? */
done:
spin_unlock_irq(&uhci->lock);
- if (rc == 0)
- del_timer_sync(&hcd->rh_timer);
return rc;
}
@@ -850,8 +829,11 @@ static int uhci_resume(struct usb_hcd *hcd)
spin_unlock_irq(&uhci->lock);
- if (hcd->poll_rh)
+ if (!uhci->working_RD) {
+ /* Suspended root hub needs to be polled */
+ hcd->poll_rh = 1;
usb_hcd_poll_rh_status(hcd);
+ }
return 0;
}
#endif