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-rw-r--r--drivers/usb/host/ehci-hcd.c3
-rw-r--r--drivers/usb/host/ehci-hub.c3
-rw-r--r--drivers/usb/host/ehci-q.c28
-rw-r--r--drivers/usb/host/ehci-timer.c2
4 files changed, 20 insertions, 16 deletions
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index c5465bf9a798..84c41262109c 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -306,6 +306,7 @@ static void ehci_quiesce (struct ehci_hcd *ehci)
/*-------------------------------------------------------------------------*/
+static void end_iaa_cycle(struct ehci_hcd *ehci);
static void end_unlink_async(struct ehci_hcd *ehci);
static void unlink_empty_async(struct ehci_hcd *ehci);
static void unlink_empty_async_suspended(struct ehci_hcd *ehci);
@@ -758,7 +759,7 @@ static irqreturn_t ehci_irq (struct usb_hcd *hcd)
ehci_dbg(ehci, "IAA with IAAD still set?\n");
if (ehci->iaa_in_progress)
COUNT(ehci->stats.iaa);
- end_unlink_async(ehci);
+ end_iaa_cycle(ehci);
}
/* remote wakeup [4.3.1] */
diff --git a/drivers/usb/host/ehci-hub.c b/drivers/usb/host/ehci-hub.c
index 086a7115d263..6d84ce2edc27 100644
--- a/drivers/usb/host/ehci-hub.c
+++ b/drivers/usb/host/ehci-hub.c
@@ -347,7 +347,8 @@ static int ehci_bus_suspend (struct usb_hcd *hcd)
goto done;
ehci->rh_state = EHCI_RH_SUSPENDED;
- end_unlink_async(ehci);
+ /* Any IAA cycle that started before the suspend is now invalid */
+ end_iaa_cycle(ehci);
unlink_empty_async_suspended(ehci);
ehci_handle_start_intr_unlinks(ehci);
ehci_handle_intr_unlinks(ehci);
diff --git a/drivers/usb/host/ehci-q.c b/drivers/usb/host/ehci-q.c
index 1b42bcb59743..15dcae8f0631 100644
--- a/drivers/usb/host/ehci-q.c
+++ b/drivers/usb/host/ehci-q.c
@@ -1283,17 +1283,13 @@ static void single_unlink_async(struct ehci_hcd *ehci, struct ehci_qh *qh)
static void start_iaa_cycle(struct ehci_hcd *ehci)
{
- /* Do nothing if an IAA cycle is already running */
- if (ehci->iaa_in_progress)
- return;
- ehci->iaa_in_progress = true;
-
/* If the controller isn't running, we don't have to wait for it */
if (unlikely(ehci->rh_state < EHCI_RH_RUNNING)) {
end_unlink_async(ehci);
- /* Otherwise start a new IAA cycle */
- } else if (likely(ehci->rh_state == EHCI_RH_RUNNING)) {
+ /* Otherwise start a new IAA cycle if one isn't already running */
+ } else if (ehci->rh_state == EHCI_RH_RUNNING &&
+ !ehci->iaa_in_progress) {
/* Make sure the unlinks are all visible to the hardware */
wmb();
@@ -1301,17 +1297,13 @@ static void start_iaa_cycle(struct ehci_hcd *ehci)
ehci_writel(ehci, ehci->command | CMD_IAAD,
&ehci->regs->command);
ehci_readl(ehci, &ehci->regs->command);
+ ehci->iaa_in_progress = true;
ehci_enable_event(ehci, EHCI_HRTIMER_IAA_WATCHDOG, true);
}
}
-/* the async qh for the qtds being unlinked are now gone from the HC */
-
-static void end_unlink_async(struct ehci_hcd *ehci)
+static void end_iaa_cycle(struct ehci_hcd *ehci)
{
- struct ehci_qh *qh;
- bool early_exit;
-
if (ehci->has_synopsys_hc_bug)
ehci_writel(ehci, (u32) ehci->async->qh_dma,
&ehci->regs->async_next);
@@ -1319,6 +1311,16 @@ static void end_unlink_async(struct ehci_hcd *ehci)
/* The current IAA cycle has ended */
ehci->iaa_in_progress = false;
+ end_unlink_async(ehci);
+}
+
+/* See if the async qh for the qtds being unlinked are now gone from the HC */
+
+static void end_unlink_async(struct ehci_hcd *ehci)
+{
+ struct ehci_qh *qh;
+ bool early_exit;
+
if (list_empty(&ehci->async_unlink))
return;
qh = list_first_entry(&ehci->async_unlink, struct ehci_qh,
diff --git a/drivers/usb/host/ehci-timer.c b/drivers/usb/host/ehci-timer.c
index 37a3e0dece84..6bea4d553ec5 100644
--- a/drivers/usb/host/ehci-timer.c
+++ b/drivers/usb/host/ehci-timer.c
@@ -361,7 +361,7 @@ static void ehci_iaa_watchdog(struct ehci_hcd *ehci)
}
ehci_dbg(ehci, "IAA watchdog: status %x cmd %x\n", status, cmd);
- end_unlink_async(ehci);
+ end_iaa_cycle(ehci);
}