diff options
author | Sarah Sharp <sarah.a.sharp@linux.intel.com> | 2010-10-15 08:55:24 -0700 |
---|---|---|
committer | Sarah Sharp <sarah.a.sharp@linux.intel.com> | 2011-03-13 18:07:14 -0700 |
commit | d673bfcbfffdeb56064a6b1ee047b85590bed76c (patch) | |
tree | 50a4efa53b8ca6815ca25292136e7990425f0d36 /drivers/usb/core | |
parent | 23e0d1066f429ab44305e96fbff13f1793886277 (diff) | |
download | kernel_samsung_tuna-d673bfcbfffdeb56064a6b1ee047b85590bed76c.zip kernel_samsung_tuna-d673bfcbfffdeb56064a6b1ee047b85590bed76c.tar.gz kernel_samsung_tuna-d673bfcbfffdeb56064a6b1ee047b85590bed76c.tar.bz2 |
usb: Change usb_hcd->bandwidth_mutex to a pointer.
Change the bandwith_mutex in struct usb_hcd to a pointer. This will allow
the pointer to be shared across usb_hcds for the upcoming work to split
the xHCI driver roothub into a USB 2.0/1.1 and a USB 3.0 bus.
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Diffstat (limited to 'drivers/usb/core')
-rw-r--r-- | drivers/usb/core/hcd.c | 11 | ||||
-rw-r--r-- | drivers/usb/core/hub.c | 8 | ||||
-rw-r--r-- | drivers/usb/core/message.c | 22 |
3 files changed, 25 insertions, 16 deletions
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c index 40c7a46..3ba2711 100644 --- a/drivers/usb/core/hcd.c +++ b/drivers/usb/core/hcd.c @@ -2191,6 +2191,15 @@ struct usb_hcd *usb_create_hcd (const struct hc_driver *driver, dev_dbg (dev, "hcd alloc failed\n"); return NULL; } + hcd->bandwidth_mutex = kmalloc(sizeof(*hcd->bandwidth_mutex), + GFP_KERNEL); + if (!hcd->bandwidth_mutex) { + kfree(hcd); + dev_dbg(dev, "hcd bandwidth mutex alloc failed\n"); + return NULL; + } + mutex_init(hcd->bandwidth_mutex); + dev_set_drvdata(dev, hcd); kref_init(&hcd->kref); @@ -2205,7 +2214,6 @@ struct usb_hcd *usb_create_hcd (const struct hc_driver *driver, #ifdef CONFIG_USB_SUSPEND INIT_WORK(&hcd->wakeup_work, hcd_resume_work); #endif - mutex_init(&hcd->bandwidth_mutex); hcd->driver = driver; hcd->product_desc = (driver->product_desc) ? driver->product_desc : @@ -2218,6 +2226,7 @@ static void hcd_release (struct kref *kref) { struct usb_hcd *hcd = container_of (kref, struct usb_hcd, kref); + kfree(hcd->bandwidth_mutex); kfree(hcd); } diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index 0eb2700..825d803 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -3776,13 +3776,13 @@ static int usb_reset_and_verify_device(struct usb_device *udev) if (!udev->actconfig) goto done; - mutex_lock(&hcd->bandwidth_mutex); + mutex_lock(hcd->bandwidth_mutex); ret = usb_hcd_alloc_bandwidth(udev, udev->actconfig, NULL, NULL); if (ret < 0) { dev_warn(&udev->dev, "Busted HC? Not enough HCD resources for " "old configuration.\n"); - mutex_unlock(&hcd->bandwidth_mutex); + mutex_unlock(hcd->bandwidth_mutex); goto re_enumerate; } ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), @@ -3793,10 +3793,10 @@ static int usb_reset_and_verify_device(struct usb_device *udev) dev_err(&udev->dev, "can't restore configuration #%d (error=%d)\n", udev->actconfig->desc.bConfigurationValue, ret); - mutex_unlock(&hcd->bandwidth_mutex); + mutex_unlock(hcd->bandwidth_mutex); goto re_enumerate; } - mutex_unlock(&hcd->bandwidth_mutex); + mutex_unlock(hcd->bandwidth_mutex); usb_set_device_state(udev, USB_STATE_CONFIGURED); /* Put interfaces back into the same altsettings as before. diff --git a/drivers/usb/core/message.c b/drivers/usb/core/message.c index 8324874..5701e85 100644 --- a/drivers/usb/core/message.c +++ b/drivers/usb/core/message.c @@ -1284,12 +1284,12 @@ int usb_set_interface(struct usb_device *dev, int interface, int alternate) /* Make sure we have enough bandwidth for this alternate interface. * Remove the current alt setting and add the new alt setting. */ - mutex_lock(&hcd->bandwidth_mutex); + mutex_lock(hcd->bandwidth_mutex); ret = usb_hcd_alloc_bandwidth(dev, NULL, iface->cur_altsetting, alt); if (ret < 0) { dev_info(&dev->dev, "Not enough bandwidth for altsetting %d\n", alternate); - mutex_unlock(&hcd->bandwidth_mutex); + mutex_unlock(hcd->bandwidth_mutex); return ret; } @@ -1311,10 +1311,10 @@ int usb_set_interface(struct usb_device *dev, int interface, int alternate) } else if (ret < 0) { /* Re-instate the old alt setting */ usb_hcd_alloc_bandwidth(dev, NULL, alt, iface->cur_altsetting); - mutex_unlock(&hcd->bandwidth_mutex); + mutex_unlock(hcd->bandwidth_mutex); return ret; } - mutex_unlock(&hcd->bandwidth_mutex); + mutex_unlock(hcd->bandwidth_mutex); /* FIXME drivers shouldn't need to replicate/bugfix the logic here * when they implement async or easily-killable versions of this or @@ -1413,7 +1413,7 @@ int usb_reset_configuration(struct usb_device *dev) config = dev->actconfig; retval = 0; - mutex_lock(&hcd->bandwidth_mutex); + mutex_lock(hcd->bandwidth_mutex); /* Make sure we have enough bandwidth for each alternate setting 0 */ for (i = 0; i < config->desc.bNumInterfaces; i++) { struct usb_interface *intf = config->interface[i]; @@ -1442,7 +1442,7 @@ reset_old_alts: usb_hcd_alloc_bandwidth(dev, NULL, alt, intf->cur_altsetting); } - mutex_unlock(&hcd->bandwidth_mutex); + mutex_unlock(hcd->bandwidth_mutex); return retval; } retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), @@ -1451,7 +1451,7 @@ reset_old_alts: NULL, 0, USB_CTRL_SET_TIMEOUT); if (retval < 0) goto reset_old_alts; - mutex_unlock(&hcd->bandwidth_mutex); + mutex_unlock(hcd->bandwidth_mutex); /* re-init hc/hcd interface/endpoint state */ for (i = 0; i < config->desc.bNumInterfaces; i++) { @@ -1739,10 +1739,10 @@ free_interfaces: * host controller will not allow submissions to dropped endpoints. If * this call fails, the device state is unchanged. */ - mutex_lock(&hcd->bandwidth_mutex); + mutex_lock(hcd->bandwidth_mutex); ret = usb_hcd_alloc_bandwidth(dev, cp, NULL, NULL); if (ret < 0) { - mutex_unlock(&hcd->bandwidth_mutex); + mutex_unlock(hcd->bandwidth_mutex); usb_autosuspend_device(dev); goto free_interfaces; } @@ -1761,11 +1761,11 @@ free_interfaces: if (!cp) { usb_set_device_state(dev, USB_STATE_ADDRESS); usb_hcd_alloc_bandwidth(dev, NULL, NULL, NULL); - mutex_unlock(&hcd->bandwidth_mutex); + mutex_unlock(hcd->bandwidth_mutex); usb_autosuspend_device(dev); goto free_interfaces; } - mutex_unlock(&hcd->bandwidth_mutex); + mutex_unlock(hcd->bandwidth_mutex); usb_set_device_state(dev, USB_STATE_CONFIGURED); /* Initialize the new interface structures and the |