diff options
Diffstat (limited to 'drivers/usb/host/uhci-hcd.c')
| -rw-r--r-- | drivers/usb/host/uhci-hcd.c | 37 |
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, |
