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[PATCH] USB Gadget: dummy_hcd: updates to hcd->state

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This patch (as613) moves the updates to hcd->state in the dummy_hcd
driver to where they now belong.  It also uses the new
HC_FLAG_HW_ACCESSIBLE flag in a way that simulates a real PCI
controller, and it adds checks for attempts to resume the bus while the
controller is suspended or to suspend the controller while the bus is
active.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Alan Stern
2005-11-29 12:08:15 -05:00
committed by Greg Kroah-Hartman
parent a21d4fed4b
commit 3cf0a22e8b
1 changed files with 31 additions and 12 deletions
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35
drivers/usb/gadget/dummy_hcd.c
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@@ -1576,7 +1576,7 @@ static int dummy_hub_status (struct usb_hcd *hcd, char *buf)
dum = hcd_to_dummy (hcd); dum = hcd_to_dummy (hcd);
spin_lock_irqsave (&dum->lock, flags); spin_lock_irqsave (&dum->lock, flags);
if (hcd->state != HC_STATE_RUNNING) if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))
goto done; goto done;
if (dum->resuming && time_after_eq (jiffies, dum->re_timeout)) { if (dum->resuming && time_after_eq (jiffies, dum->re_timeout)) {
@@ -1623,7 +1623,7 @@ static int dummy_hub_control (
int retval = 0; int retval = 0;
unsigned long flags; unsigned long flags;
if (hcd->state != HC_STATE_RUNNING) if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))
return -ETIMEDOUT; return -ETIMEDOUT;
dum = hcd_to_dummy (hcd); dum = hcd_to_dummy (hcd);
@@ -1756,9 +1756,12 @@ static int dummy_bus_suspend (struct usb_hcd *hcd)
{ {
struct dummy *dum = hcd_to_dummy (hcd); struct dummy *dum = hcd_to_dummy (hcd);
dev_dbg (&hcd->self.root_hub->dev, "%s\n", __FUNCTION__);
spin_lock_irq (&dum->lock); spin_lock_irq (&dum->lock);
dum->rh_state = DUMMY_RH_SUSPENDED; dum->rh_state = DUMMY_RH_SUSPENDED;
set_link_state (dum); set_link_state (dum);
hcd->state = HC_STATE_SUSPENDED;
spin_unlock_irq (&dum->lock); spin_unlock_irq (&dum->lock);
return 0; return 0;
} }
@@ -1766,14 +1769,23 @@ static int dummy_bus_suspend (struct usb_hcd *hcd)
static int dummy_bus_resume (struct usb_hcd *hcd) static int dummy_bus_resume (struct usb_hcd *hcd)
{ {
struct dummy *dum = hcd_to_dummy (hcd); struct dummy *dum = hcd_to_dummy (hcd);
int rc = 0;
dev_dbg (&hcd->self.root_hub->dev, "%s\n", __FUNCTION__);
spin_lock_irq (&dum->lock); spin_lock_irq (&dum->lock);
if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) {
dev_warn (&hcd->self.root_hub->dev, "HC isn't running!\n");
rc = -ENODEV;
} else {
dum->rh_state = DUMMY_RH_RUNNING; dum->rh_state = DUMMY_RH_RUNNING;
set_link_state (dum); set_link_state (dum);
if (!list_empty(&dum->urbp_list)) if (!list_empty(&dum->urbp_list))
mod_timer (&dum->timer, jiffies); mod_timer (&dum->timer, jiffies);
hcd->state = HC_STATE_RUNNING;
}
spin_unlock_irq (&dum->lock); spin_unlock_irq (&dum->lock);
return 0; return rc;
} }
/*-------------------------------------------------------------------------*/ /*-------------------------------------------------------------------------*/
@@ -1933,12 +1945,19 @@ static int dummy_hcd_remove (struct platform_device *pdev)
static int dummy_hcd_suspend (struct platform_device *pdev, pm_message_t state) static int dummy_hcd_suspend (struct platform_device *pdev, pm_message_t state)
{ {
struct usb_hcd *hcd; struct usb_hcd *hcd;
struct dummy *dum;
int rc = 0;
dev_dbg (&pdev->dev, "%s\n", __FUNCTION__); dev_dbg (&pdev->dev, "%s\n", __FUNCTION__);
hcd = platform_get_drvdata (pdev);
hcd->state = HC_STATE_SUSPENDED; hcd = platform_get_drvdata (pdev);
return 0; dum = hcd_to_dummy (hcd);
if (dum->rh_state == DUMMY_RH_RUNNING) {
dev_warn(&pdev->dev, "Root hub isn't suspended!\n");
rc = -EBUSY;
} else
clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
return rc;
} }
static int dummy_hcd_resume (struct platform_device *pdev) static int dummy_hcd_resume (struct platform_device *pdev)
@@ -1946,9 +1965,9 @@ static int dummy_hcd_resume (struct platform_device *pdev)
struct usb_hcd *hcd; struct usb_hcd *hcd;
dev_dbg (&pdev->dev, "%s\n", __FUNCTION__); dev_dbg (&pdev->dev, "%s\n", __FUNCTION__);
hcd = platform_get_drvdata (pdev);
hcd->state = HC_STATE_RUNNING;
hcd = platform_get_drvdata (pdev);
set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
usb_hcd_poll_rh_status (hcd); usb_hcd_poll_rh_status (hcd);
return 0; return 0;
} }