[PATCH] UHCI: various updates

This patch (as705) contains a small set of updates for uhci-hcd written
mostly by Dave Brownell:

  * Root hub suspend messages come out labeled as root hub messages;
    PCI messages should only come out when the pci device suspends.

  * Rename the reset() method to better match its init() role

  * Behave more like the other HCDs by returning -ESHUTDOWN for root-hub
    suspend/resume errors.

  * When an URB fails, associate the message with the usb device not
    the host controller (it still hides endpoint and direction)

From: David Brownell <david-b@pacbell.net>
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 21 insertions, 16 deletions

diff --git a/drivers/usb/host/uhci-hcd.c b/drivers/usb/host/uhci-hcd.c
index 5e75ad6dc29f..dc9ed29c6175 100644
--- a/drivers/usb/host/uhci-hcd.c
+++ b/drivers/usb/host/uhci-hcd.c
@@ -124,8 +124,9 @@ static void hc_died(struct uhci_hcd *uhci)
 }
 
 /*
- * Initialize a controller that was newly discovered or has just been
- * resumed.  In either case we can't be sure of its previous state.
+ * Initialize a controller that was newly discovered or has lost power
+ * or otherwise been reset while it was suspended.  In none of these cases
+ * can we be sure of its previous state.
  */
 static void check_and_reset_hc(struct uhci_hcd *uhci)
 {
@@ -198,7 +199,8 @@ __acquires(uhci->lock)
         int int_enable;
 
         auto_stop = (new_state == UHCI_RH_AUTO_STOPPED);
-        dev_dbg(uhci_dev(uhci), "%s%s\n", __FUNCTION__,
+        dev_dbg(&uhci_to_hcd(uhci)->self.root_hub->dev,
+                        "%s%s\n", __FUNCTION__,
                         (auto_stop ? " (auto-stop)" : ""));
 
         /* If we get a suspend request when we're already auto-stopped
@@ -236,7 +238,8 @@ __acquires(uhci->lock)
                         return;
         }
         if (!(inw(uhci->io_addr + USBSTS) & USBSTS_HCH))
-                dev_warn(uhci_dev(uhci), "Controller not stopped yet!\n");
+                dev_warn(&uhci_to_hcd(uhci)->self.root_hub->dev,
+                        "Controller not stopped yet!\n");
 
         uhci_get_current_frame_number(uhci);
 
@@ -268,7 +271,8 @@ static void wakeup_rh(struct uhci_hcd *uhci)
 __releases(uhci->lock)
 __acquires(uhci->lock)
 {
-        dev_dbg(uhci_dev(uhci), "%s%s\n", __FUNCTION__,
+        dev_dbg(&uhci_to_hcd(uhci)->self.root_hub->dev,
+                        "%s%s\n", __FUNCTION__,
                         uhci->rh_state == UHCI_RH_AUTO_STOPPED ?
                                 " (auto-start)" : "");
 
@@ -406,7 +410,7 @@ static void release_uhci(struct uhci_hcd *uhci)
                         uhci->frame, uhci->frame_dma_handle);
 }
 
-static int uhci_reset(struct usb_hcd *hcd)
+static int uhci_init(struct usb_hcd *hcd)
 {
         struct uhci_hcd *uhci = hcd_to_uhci(hcd);
         unsigned io_size = (unsigned) hcd->rsrc_len;
@@ -672,12 +676,15 @@ static void uhci_stop(struct usb_hcd *hcd)
 static int uhci_rh_suspend(struct usb_hcd *hcd)
 {
         struct uhci_hcd *uhci = hcd_to_uhci(hcd);
+        int rc = 0;
 
         spin_lock_irq(&uhci->lock);
-        if (!uhci->hc_inaccessible)             /* Not dead */
+        if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))
+                rc = -ESHUTDOWN;
+        else if (!uhci->hc_inaccessible)
                 suspend_rh(uhci, UHCI_RH_SUSPENDED);
         spin_unlock_irq(&uhci->lock);
-        return 0;
+        return rc;
 }
 
 static int uhci_rh_resume(struct usb_hcd *hcd)
@@ -686,13 +693,10 @@ static int uhci_rh_resume(struct usb_hcd *hcd)
         int rc = 0;
 
         spin_lock_irq(&uhci->lock);
-        if (uhci->hc_inaccessible) {
-                if (uhci->rh_state == UHCI_RH_SUSPENDED) {
-                        dev_warn(uhci_dev(uhci), "HC isn't running!\n");
-                        rc = -ENODEV;
-                }
-                /* Otherwise the HC is dead */
-        } else
+        if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) {
+                dev_warn(&hcd->self.root_hub->dev, "HC isn't running!\n");
+                rc = -ESHUTDOWN;
+        } else if (!uhci->hc_inaccessible)
                 wakeup_rh(uhci);
         spin_unlock_irq(&uhci->lock);
         return rc;
@@ -746,6 +750,7 @@ static int uhci_resume(struct usb_hcd *hcd)
 
         if (uhci->rh_state == UHCI_RH_RESET)    /* Dead */
                 return 0;
+
         spin_lock_irq(&uhci->lock);
 
         /* FIXME: Disable non-PME# remote wakeup? */
@@ -828,7 +833,7 @@ static const struct hc_driver uhci_driver = {
         .flags =                HCD_USB11,
 
         /* Basic lifecycle operations */
-        .reset =                uhci_reset,
+        .reset =                uhci_init,
         .start =                uhci_start,
 #ifdef CONFIG_PM
         .suspend =              uhci_suspend,