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path: root/drivers/usb/core
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-rw-r--r--drivers/usb/core/devices.c2
-rw-r--r--drivers/usb/core/devio.c48
-rw-r--r--drivers/usb/core/driver.c8
-rw-r--r--drivers/usb/core/endpoint.c1
-rw-r--r--drivers/usb/core/hcd-pci.c127
-rw-r--r--drivers/usb/core/hcd.c18
-rw-r--r--drivers/usb/core/hub.c19
-rw-r--r--drivers/usb/core/message.c9
-rw-r--r--drivers/usb/core/sysfs.c6
9 files changed, 204 insertions, 34 deletions
diff --git a/drivers/usb/core/devices.c b/drivers/usb/core/devices.c
index 96f11715cd26..355dffcc23b0 100644
--- a/drivers/usb/core/devices.c
+++ b/drivers/usb/core/devices.c
@@ -494,7 +494,7 @@ static ssize_t usb_device_dump(char __user **buffer, size_t *nbytes,
return 0;
/* allocate 2^1 pages = 8K (on i386);
* should be more than enough for one device */
- pages_start = (char *)__get_free_pages(GFP_KERNEL, 1);
+ pages_start = (char *)__get_free_pages(GFP_NOIO, 1);
if (!pages_start)
return -ENOMEM;
diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c
index 6e8bcdfd23b4..a678186f218f 100644
--- a/drivers/usb/core/devio.c
+++ b/drivers/usb/core/devio.c
@@ -1312,9 +1312,9 @@ static int processcompl(struct async *as, void __user * __user *arg)
void __user *addr = as->userurb;
unsigned int i;
- if (as->userbuffer)
+ if (as->userbuffer && urb->actual_length)
if (copy_to_user(as->userbuffer, urb->transfer_buffer,
- urb->transfer_buffer_length))
+ urb->actual_length))
goto err_out;
if (put_user(as->status, &userurb->status))
goto err_out;
@@ -1334,14 +1334,11 @@ static int processcompl(struct async *as, void __user * __user *arg)
}
}
- free_async(as);
-
if (put_user(addr, (void __user * __user *)arg))
return -EFAULT;
return 0;
err_out:
- free_async(as);
return -EFAULT;
}
@@ -1371,8 +1368,11 @@ static struct async *reap_as(struct dev_state *ps)
static int proc_reapurb(struct dev_state *ps, void __user *arg)
{
struct async *as = reap_as(ps);
- if (as)
- return processcompl(as, (void __user * __user *)arg);
+ if (as) {
+ int retval = processcompl(as, (void __user * __user *)arg);
+ free_async(as);
+ return retval;
+ }
if (signal_pending(current))
return -EINTR;
return -EIO;
@@ -1380,11 +1380,16 @@ static int proc_reapurb(struct dev_state *ps, void __user *arg)
static int proc_reapurbnonblock(struct dev_state *ps, void __user *arg)
{
+ int retval;
struct async *as;
- if (!(as = async_getcompleted(ps)))
- return -EAGAIN;
- return processcompl(as, (void __user * __user *)arg);
+ as = async_getcompleted(ps);
+ retval = -EAGAIN;
+ if (as) {
+ retval = processcompl(as, (void __user * __user *)arg);
+ free_async(as);
+ }
+ return retval;
}
#ifdef CONFIG_COMPAT
@@ -1475,9 +1480,9 @@ static int processcompl_compat(struct async *as, void __user * __user *arg)
void __user *addr = as->userurb;
unsigned int i;
- if (as->userbuffer)
+ if (as->userbuffer && urb->actual_length)
if (copy_to_user(as->userbuffer, urb->transfer_buffer,
- urb->transfer_buffer_length))
+ urb->actual_length))
return -EFAULT;
if (put_user(as->status, &userurb->status))
return -EFAULT;
@@ -1497,7 +1502,6 @@ static int processcompl_compat(struct async *as, void __user * __user *arg)
}
}
- free_async(as);
if (put_user(ptr_to_compat(addr), (u32 __user *)arg))
return -EFAULT;
return 0;
@@ -1506,8 +1510,11 @@ static int processcompl_compat(struct async *as, void __user * __user *arg)
static int proc_reapurb_compat(struct dev_state *ps, void __user *arg)
{
struct async *as = reap_as(ps);
- if (as)
- return processcompl_compat(as, (void __user * __user *)arg);
+ if (as) {
+ int retval = processcompl_compat(as, (void __user * __user *)arg);
+ free_async(as);
+ return retval;
+ }
if (signal_pending(current))
return -EINTR;
return -EIO;
@@ -1515,11 +1522,16 @@ static int proc_reapurb_compat(struct dev_state *ps, void __user *arg)
static int proc_reapurbnonblock_compat(struct dev_state *ps, void __user *arg)
{
+ int retval;
struct async *as;
- if (!(as = async_getcompleted(ps)))
- return -EAGAIN;
- return processcompl_compat(as, (void __user * __user *)arg);
+ retval = -EAGAIN;
+ as = async_getcompleted(ps);
+ if (as) {
+ retval = processcompl_compat(as, (void __user * __user *)arg);
+ free_async(as);
+ }
+ return retval;
}
diff --git a/drivers/usb/core/driver.c b/drivers/usb/core/driver.c
index 60a45f1e3a67..f2f055eb6831 100644
--- a/drivers/usb/core/driver.c
+++ b/drivers/usb/core/driver.c
@@ -1022,6 +1022,14 @@ static int usb_resume_device(struct usb_device *udev, pm_message_t msg)
goto done;
}
+ /* Non-root devices on a full/low-speed bus must wait for their
+ * companion high-speed root hub, in case a handoff is needed.
+ */
+ if (!(msg.event & PM_EVENT_AUTO) && udev->parent &&
+ udev->bus->hs_companion)
+ device_pm_wait_for_dev(&udev->dev,
+ &udev->bus->hs_companion->root_hub->dev);
+
if (udev->quirks & USB_QUIRK_RESET_RESUME)
udev->reset_resume = 1;
diff --git a/drivers/usb/core/endpoint.c b/drivers/usb/core/endpoint.c
index fdfaa7885515..d26b9ea981f9 100644
--- a/drivers/usb/core/endpoint.c
+++ b/drivers/usb/core/endpoint.c
@@ -186,6 +186,7 @@ int usb_create_ep_devs(struct device *parent,
ep_dev->dev.parent = parent;
ep_dev->dev.release = ep_device_release;
dev_set_name(&ep_dev->dev, "ep_%02x", endpoint->desc.bEndpointAddress);
+ device_enable_async_suspend(&ep_dev->dev);
retval = device_register(&ep_dev->dev);
if (retval)
diff --git a/drivers/usb/core/hcd-pci.c b/drivers/usb/core/hcd-pci.c
index 2dcf906df569..15286533c15a 100644
--- a/drivers/usb/core/hcd-pci.c
+++ b/drivers/usb/core/hcd-pci.c
@@ -19,6 +19,7 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
+#include <linux/pm_runtime.h>
#include <linux/usb.h>
#include <asm/io.h>
@@ -37,6 +38,122 @@
/* PCI-based HCs are common, but plenty of non-PCI HCs are used too */
+#ifdef CONFIG_PM_SLEEP
+
+/* Coordinate handoffs between EHCI and companion controllers
+ * during system resume
+ */
+
+static DEFINE_MUTEX(companions_mutex);
+
+#define CL_UHCI PCI_CLASS_SERIAL_USB_UHCI
+#define CL_OHCI PCI_CLASS_SERIAL_USB_OHCI
+#define CL_EHCI PCI_CLASS_SERIAL_USB_EHCI
+
+enum companion_action {
+ SET_HS_COMPANION, CLEAR_HS_COMPANION, WAIT_FOR_COMPANIONS
+};
+
+static void companion_common(struct pci_dev *pdev, struct usb_hcd *hcd,
+ enum companion_action action)
+{
+ struct pci_dev *companion;
+ struct usb_hcd *companion_hcd;
+ unsigned int slot = PCI_SLOT(pdev->devfn);
+
+ /* Iterate through other PCI functions in the same slot.
+ * If pdev is OHCI or UHCI then we are looking for EHCI, and
+ * vice versa.
+ */
+ companion = NULL;
+ for (;;) {
+ companion = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, companion);
+ if (!companion)
+ break;
+ if (companion->bus != pdev->bus ||
+ PCI_SLOT(companion->devfn) != slot)
+ continue;
+
+ companion_hcd = pci_get_drvdata(companion);
+ if (!companion_hcd)
+ continue;
+
+ /* For SET_HS_COMPANION, store a pointer to the EHCI bus in
+ * the OHCI/UHCI companion bus structure.
+ * For CLEAR_HS_COMPANION, clear the pointer to the EHCI bus
+ * in the OHCI/UHCI companion bus structure.
+ * For WAIT_FOR_COMPANIONS, wait until the OHCI/UHCI
+ * companion controllers have fully resumed.
+ */
+
+ if ((pdev->class == CL_OHCI || pdev->class == CL_UHCI) &&
+ companion->class == CL_EHCI) {
+ /* action must be SET_HS_COMPANION */
+ dev_dbg(&companion->dev, "HS companion for %s\n",
+ dev_name(&pdev->dev));
+ hcd->self.hs_companion = &companion_hcd->self;
+
+ } else if (pdev->class == CL_EHCI &&
+ (companion->class == CL_OHCI ||
+ companion->class == CL_UHCI)) {
+ switch (action) {
+ case SET_HS_COMPANION:
+ dev_dbg(&pdev->dev, "HS companion for %s\n",
+ dev_name(&companion->dev));
+ companion_hcd->self.hs_companion = &hcd->self;
+ break;
+ case CLEAR_HS_COMPANION:
+ companion_hcd->self.hs_companion = NULL;
+ break;
+ case WAIT_FOR_COMPANIONS:
+ device_pm_wait_for_dev(&pdev->dev,
+ &companion->dev);
+ break;
+ }
+ }
+ }
+}
+
+static void set_hs_companion(struct pci_dev *pdev, struct usb_hcd *hcd)
+{
+ mutex_lock(&companions_mutex);
+ dev_set_drvdata(&pdev->dev, hcd);
+ companion_common(pdev, hcd, SET_HS_COMPANION);
+ mutex_unlock(&companions_mutex);
+}
+
+static void clear_hs_companion(struct pci_dev *pdev, struct usb_hcd *hcd)
+{
+ mutex_lock(&companions_mutex);
+ dev_set_drvdata(&pdev->dev, NULL);
+
+ /* If pdev is OHCI or UHCI, just clear its hs_companion pointer */
+ if (pdev->class == CL_OHCI || pdev->class == CL_UHCI)
+ hcd->self.hs_companion = NULL;
+
+ /* Otherwise search for companion buses and clear their pointers */
+ else
+ companion_common(pdev, hcd, CLEAR_HS_COMPANION);
+ mutex_unlock(&companions_mutex);
+}
+
+static void wait_for_companions(struct pci_dev *pdev, struct usb_hcd *hcd)
+{
+ /* Only EHCI controllers need to wait.
+ * No locking is needed because a controller cannot be resumed
+ * while one of its companions is getting unbound.
+ */
+ if (pdev->class == CL_EHCI)
+ companion_common(pdev, hcd, WAIT_FOR_COMPANIONS);
+}
+
+#else /* !CONFIG_PM_SLEEP */
+
+static inline void set_hs_companion(struct pci_dev *d, struct usb_hcd *h) {}
+static inline void clear_hs_companion(struct pci_dev *d, struct usb_hcd *h) {}
+static inline void wait_for_companions(struct pci_dev *d, struct usb_hcd *h) {}
+
+#endif /* !CONFIG_PM_SLEEP */
/*-------------------------------------------------------------------------*/
@@ -123,7 +240,7 @@ int usb_hcd_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
if (region == PCI_ROM_RESOURCE) {
dev_dbg(&dev->dev, "no i/o regions available\n");
retval = -EBUSY;
- goto err1;
+ goto err2;
}
}
@@ -132,6 +249,7 @@ int usb_hcd_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
retval = usb_add_hcd(hcd, dev->irq, IRQF_DISABLED | IRQF_SHARED);
if (retval != 0)
goto err4;
+ set_hs_companion(dev, hcd);
return retval;
err4:
@@ -142,6 +260,7 @@ int usb_hcd_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
} else
release_region(hcd->rsrc_start, hcd->rsrc_len);
err2:
+ clear_hs_companion(dev, hcd);
usb_put_hcd(hcd);
err1:
pci_disable_device(dev);
@@ -180,6 +299,7 @@ void usb_hcd_pci_remove(struct pci_dev *dev)
} else {
release_region(hcd->rsrc_start, hcd->rsrc_len);
}
+ clear_hs_companion(dev, hcd);
usb_put_hcd(hcd);
pci_disable_device(dev);
}
@@ -344,6 +464,11 @@ static int resume_common(struct device *dev, bool hibernated)
clear_bit(HCD_FLAG_SAW_IRQ, &hcd->flags);
if (hcd->driver->pci_resume) {
+ /* This call should be made only during system resume,
+ * not during runtime resume.
+ */
+ wait_for_companions(pci_dev, hcd);
+
retval = hcd->driver->pci_resume(hcd, hibernated);
if (retval) {
dev_err(dev, "PCI post-resume error %d!\n", retval);
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index 0495fa651225..80995ef0868c 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -1684,6 +1684,24 @@ int usb_hcd_alloc_bandwidth(struct usb_device *udev,
}
}
if (cur_alt && new_alt) {
+ struct usb_interface *iface = usb_ifnum_to_if(udev,
+ cur_alt->desc.bInterfaceNumber);
+
+ if (iface->resetting_device) {
+ /*
+ * The USB core just reset the device, so the xHCI host
+ * and the device will think alt setting 0 is installed.
+ * However, the USB core will pass in the alternate
+ * setting installed before the reset as cur_alt. Dig
+ * out the alternate setting 0 structure, or the first
+ * alternate setting if a broken device doesn't have alt
+ * setting 0.
+ */
+ cur_alt = usb_altnum_to_altsetting(iface, 0);
+ if (!cur_alt)
+ cur_alt = &iface->altsetting[0];
+ }
+
/* Drop all the endpoints in the current alt setting */
for (i = 0; i < cur_alt->desc.bNumEndpoints; i++) {
ret = hcd->driver->drop_endpoint(hcd, udev,
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 0cec6caf6e9b..20ecb4cec8de 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -1817,6 +1817,7 @@ int usb_new_device(struct usb_device *udev)
/* Tell the world! */
announce_device(udev);
+ device_enable_async_suspend(&udev->dev);
/* Register the device. The device driver is responsible
* for configuring the device and invoking the add-device
* notifier chain (used by usbfs and possibly others).
@@ -3347,6 +3348,9 @@ static void hub_events(void)
USB_PORT_FEAT_C_SUSPEND);
udev = hdev->children[i-1];
if (udev) {
+ /* TRSMRCY = 10 msec */
+ msleep(10);
+
usb_lock_device(udev);
ret = remote_wakeup(hdev->
children[i-1]);
@@ -3692,19 +3696,14 @@ static int usb_reset_and_verify_device(struct usb_device *udev)
usb_enable_interface(udev, intf, true);
ret = 0;
} else {
- /* We've just reset the device, so it will think alt
- * setting 0 is installed. For usb_set_interface() to
- * work properly, we need to set the current alternate
- * interface setting to 0 (or the first alt setting, if
- * the device doesn't have alt setting 0).
+ /* Let the bandwidth allocation function know that this
+ * device has been reset, and it will have to use
+ * alternate setting 0 as the current alternate setting.
*/
- intf->cur_altsetting =
- usb_find_alt_setting(config, i, 0);
- if (!intf->cur_altsetting)
- intf->cur_altsetting =
- &config->intf_cache[i]->altsetting[0];
+ intf->resetting_device = 1;
ret = usb_set_interface(udev, desc->bInterfaceNumber,
desc->bAlternateSetting);
+ intf->resetting_device = 0;
}
if (ret < 0) {
dev_err(&udev->dev, "failed to restore interface %d "
diff --git a/drivers/usb/core/message.c b/drivers/usb/core/message.c
index 1b994846e8e0..df73574a9cc9 100644
--- a/drivers/usb/core/message.c
+++ b/drivers/usb/core/message.c
@@ -906,11 +906,11 @@ char *usb_cache_string(struct usb_device *udev, int index)
if (index <= 0)
return NULL;
- buf = kmalloc(MAX_USB_STRING_SIZE, GFP_KERNEL);
+ buf = kmalloc(MAX_USB_STRING_SIZE, GFP_NOIO);
if (buf) {
len = usb_string(udev, index, buf, MAX_USB_STRING_SIZE);
if (len > 0) {
- smallbuf = kmalloc(++len, GFP_KERNEL);
+ smallbuf = kmalloc(++len, GFP_NOIO);
if (!smallbuf)
return buf;
memcpy(smallbuf, buf, len);
@@ -1731,7 +1731,7 @@ int usb_set_configuration(struct usb_device *dev, int configuration)
if (cp) {
nintf = cp->desc.bNumInterfaces;
new_interfaces = kmalloc(nintf * sizeof(*new_interfaces),
- GFP_KERNEL);
+ GFP_NOIO);
if (!new_interfaces) {
dev_err(&dev->dev, "Out of memory\n");
return -ENOMEM;
@@ -1740,7 +1740,7 @@ int usb_set_configuration(struct usb_device *dev, int configuration)
for (; n < nintf; ++n) {
new_interfaces[n] = kzalloc(
sizeof(struct usb_interface),
- GFP_KERNEL);
+ GFP_NOIO);
if (!new_interfaces[n]) {
dev_err(&dev->dev, "Out of memory\n");
ret = -ENOMEM;
@@ -1867,6 +1867,7 @@ free_interfaces:
"adding %s (config #%d, interface %d)\n",
dev_name(&intf->dev), configuration,
intf->cur_altsetting->desc.bInterfaceNumber);
+ device_enable_async_suspend(&intf->dev);
ret = device_add(&intf->dev);
if (ret != 0) {
dev_err(&dev->dev, "device_add(%s) --> %d\n",
diff --git a/drivers/usb/core/sysfs.c b/drivers/usb/core/sysfs.c
index 485edf937f25..5f3908f6e2dc 100644
--- a/drivers/usb/core/sysfs.c
+++ b/drivers/usb/core/sysfs.c
@@ -115,6 +115,12 @@ show_speed(struct device *dev, struct device_attribute *attr, char *buf)
case USB_SPEED_HIGH:
speed = "480";
break;
+ case USB_SPEED_VARIABLE:
+ speed = "480";
+ break;
+ case USB_SPEED_SUPER:
+ speed = "5000";
+ break;
default:
speed = "unknown";
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-21 10:46:03 +0000