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-rw-r--r--drivers/usb/core/config.c1
-rw-r--r--drivers/usb/core/devio.c174
-rw-r--r--drivers/usb/core/driver.c27
-rw-r--r--drivers/usb/core/hcd.c37
-rw-r--r--drivers/usb/core/hub.c78
-rw-r--r--drivers/usb/core/message.c7
6 files changed, 274 insertions, 50 deletions
diff --git a/drivers/usb/core/config.c b/drivers/usb/core/config.c
index 062967c90b2..1ab4df1de2d 100644
--- a/drivers/usb/core/config.c
+++ b/drivers/usb/core/config.c
@@ -10,7 +10,6 @@
#define USB_MAXALTSETTING 128 /* Hard limit */
-#define USB_MAXENDPOINTS 30 /* Hard limit */
#define USB_MAXCONFIG 8 /* Arbitrary limit */
diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c
index 90e18f6fa2b..12401ee4ba0 100644
--- a/drivers/usb/core/devio.c
+++ b/drivers/usb/core/devio.c
@@ -769,6 +769,88 @@ static int check_ctrlrecip(struct dev_state *ps, unsigned int requesttype,
return ret;
}
+static struct usb_host_endpoint *ep_to_host_endpoint(struct usb_device *dev,
+ unsigned char ep)
+{
+ if (ep & USB_ENDPOINT_DIR_MASK)
+ return dev->ep_in[ep & USB_ENDPOINT_NUMBER_MASK];
+ else
+ return dev->ep_out[ep & USB_ENDPOINT_NUMBER_MASK];
+}
+
+static int parse_usbdevfs_streams(struct dev_state *ps,
+ struct usbdevfs_streams __user *streams,
+ unsigned int *num_streams_ret,
+ unsigned int *num_eps_ret,
+ struct usb_host_endpoint ***eps_ret,
+ struct usb_interface **intf_ret)
+{
+ unsigned int i, num_streams, num_eps;
+ struct usb_host_endpoint **eps;
+ struct usb_interface *intf = NULL;
+ unsigned char ep;
+ int ifnum, ret;
+
+ if (get_user(num_streams, &streams->num_streams) ||
+ get_user(num_eps, &streams->num_eps))
+ return -EFAULT;
+
+ if (num_eps < 1 || num_eps > USB_MAXENDPOINTS)
+ return -EINVAL;
+
+ /* The XHCI controller allows max 2 ^ 16 streams */
+ if (num_streams_ret && (num_streams < 2 || num_streams > 65536))
+ return -EINVAL;
+
+ eps = kmalloc(num_eps * sizeof(*eps), GFP_KERNEL);
+ if (!eps)
+ return -ENOMEM;
+
+ for (i = 0; i < num_eps; i++) {
+ if (get_user(ep, &streams->eps[i])) {
+ ret = -EFAULT;
+ goto error;
+ }
+ eps[i] = ep_to_host_endpoint(ps->dev, ep);
+ if (!eps[i]) {
+ ret = -EINVAL;
+ goto error;
+ }
+
+ /* usb_alloc/free_streams operate on an usb_interface */
+ ifnum = findintfep(ps->dev, ep);
+ if (ifnum < 0) {
+ ret = ifnum;
+ goto error;
+ }
+
+ if (i == 0) {
+ ret = checkintf(ps, ifnum);
+ if (ret < 0)
+ goto error;
+ intf = usb_ifnum_to_if(ps->dev, ifnum);
+ } else {
+ /* Verify all eps belong to the same interface */
+ if (ifnum != intf->altsetting->desc.bInterfaceNumber) {
+ ret = -EINVAL;
+ goto error;
+ }
+ }
+ }
+
+ if (num_streams_ret)
+ *num_streams_ret = num_streams;
+ *num_eps_ret = num_eps;
+ *eps_ret = eps;
+ *intf_ret = intf;
+
+ return 0;
+
+error:
+ kfree(eps);
+ return ret;
+}
+
static int match_devt(struct device *dev, void *data)
{
return dev->devt == (dev_t) (unsigned long) data;
@@ -1043,6 +1125,20 @@ static int proc_bulk(struct dev_state *ps, void __user *arg)
return ret;
}
+static void check_reset_of_active_ep(struct usb_device *udev,
+ unsigned int epnum, char *ioctl_name)
+{
+ struct usb_host_endpoint **eps;
+ struct usb_host_endpoint *ep;
+
+ eps = (epnum & USB_DIR_IN) ? udev->ep_in : udev->ep_out;
+ ep = eps[epnum & 0x0f];
+ if (ep && !list_empty(&ep->urb_list))
+ dev_warn(&udev->dev, "Process %d (%s) called USBDEVFS_%s for active endpoint 0x%02x\n",
+ task_pid_nr(current), current->comm,
+ ioctl_name, epnum);
+}
+
static int proc_resetep(struct dev_state *ps, void __user *arg)
{
unsigned int ep;
@@ -1056,6 +1152,7 @@ static int proc_resetep(struct dev_state *ps, void __user *arg)
ret = checkintf(ps, ret);
if (ret)
return ret;
+ check_reset_of_active_ep(ps->dev, ep, "RESETEP");
usb_reset_endpoint(ps->dev, ep);
return 0;
}
@@ -1074,6 +1171,7 @@ static int proc_clearhalt(struct dev_state *ps, void __user *arg)
ret = checkintf(ps, ret);
if (ret)
return ret;
+ check_reset_of_active_ep(ps->dev, ep, "CLEAR_HALT");
if (ep & USB_DIR_IN)
pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f);
else
@@ -1127,6 +1225,9 @@ static int proc_setintf(struct dev_state *ps, void __user *arg)
return -EFAULT;
if ((ret = checkintf(ps, setintf.interface)))
return ret;
+
+ destroy_async_on_interface(ps, setintf.interface);
+
return usb_set_interface(ps->dev, setintf.interface,
setintf.altsetting);
}
@@ -1189,6 +1290,8 @@ static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb,
struct usb_ctrlrequest *dr = NULL;
unsigned int u, totlen, isofrmlen;
int i, ret, is_in, num_sgs = 0, ifnum = -1;
+ int number_of_packets = 0;
+ unsigned int stream_id = 0;
void *buf;
if (uurb->flags & ~(USBDEVFS_URB_ISO_ASAP |
@@ -1209,15 +1312,10 @@ static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb,
if (ret)
return ret;
}
- if ((uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0) {
- is_in = 1;
- ep = ps->dev->ep_in[uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
- } else {
- is_in = 0;
- ep = ps->dev->ep_out[uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
- }
+ ep = ep_to_host_endpoint(ps->dev, uurb->endpoint);
if (!ep)
return -ENOENT;
+ is_in = (uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0;
u = 0;
switch(uurb->type) {
@@ -1242,7 +1340,6 @@ static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb,
le16_to_cpup(&dr->wIndex));
if (ret)
goto error;
- uurb->number_of_packets = 0;
uurb->buffer_length = le16_to_cpup(&dr->wLength);
uurb->buffer += 8;
if ((dr->bRequestType & USB_DIR_IN) && uurb->buffer_length) {
@@ -1272,17 +1369,17 @@ static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb,
uurb->type = USBDEVFS_URB_TYPE_INTERRUPT;
goto interrupt_urb;
}
- uurb->number_of_packets = 0;
num_sgs = DIV_ROUND_UP(uurb->buffer_length, USB_SG_SIZE);
if (num_sgs == 1 || num_sgs > ps->dev->bus->sg_tablesize)
num_sgs = 0;
+ if (ep->streams)
+ stream_id = uurb->stream_id;
break;
case USBDEVFS_URB_TYPE_INTERRUPT:
if (!usb_endpoint_xfer_int(&ep->desc))
return -EINVAL;
interrupt_urb:
- uurb->number_of_packets = 0;
break;
case USBDEVFS_URB_TYPE_ISO:
@@ -1292,15 +1389,16 @@ static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb,
return -EINVAL;
if (!usb_endpoint_xfer_isoc(&ep->desc))
return -EINVAL;
+ number_of_packets = uurb->number_of_packets;
isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) *
- uurb->number_of_packets;
+ number_of_packets;
if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL)))
return -ENOMEM;
if (copy_from_user(isopkt, iso_frame_desc, isofrmlen)) {
ret = -EFAULT;
goto error;
}
- for (totlen = u = 0; u < uurb->number_of_packets; u++) {
+ for (totlen = u = 0; u < number_of_packets; u++) {
/*
* arbitrary limit need for USB 3.0
* bMaxBurst (0~15 allowed, 1~16 packets)
@@ -1331,7 +1429,7 @@ static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb,
ret = -EFAULT;
goto error;
}
- as = alloc_async(uurb->number_of_packets);
+ as = alloc_async(number_of_packets);
if (!as) {
ret = -ENOMEM;
goto error;
@@ -1425,7 +1523,8 @@ static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb,
as->urb->setup_packet = (unsigned char *)dr;
dr = NULL;
as->urb->start_frame = uurb->start_frame;
- as->urb->number_of_packets = uurb->number_of_packets;
+ as->urb->number_of_packets = number_of_packets;
+ as->urb->stream_id = stream_id;
if (uurb->type == USBDEVFS_URB_TYPE_ISO ||
ps->dev->speed == USB_SPEED_HIGH)
as->urb->interval = 1 << min(15, ep->desc.bInterval - 1);
@@ -1433,7 +1532,7 @@ static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb,
as->urb->interval = ep->desc.bInterval;
as->urb->context = as;
as->urb->complete = async_completed;
- for (totlen = u = 0; u < uurb->number_of_packets; u++) {
+ for (totlen = u = 0; u < number_of_packets; u++) {
as->urb->iso_frame_desc[u].offset = totlen;
as->urb->iso_frame_desc[u].length = isopkt[u].length;
totlen += isopkt[u].length;
@@ -1983,6 +2082,45 @@ static int proc_disconnect_claim(struct dev_state *ps, void __user *arg)
return claimintf(ps, dc.interface);
}
+static int proc_alloc_streams(struct dev_state *ps, void __user *arg)
+{
+ unsigned num_streams, num_eps;
+ struct usb_host_endpoint **eps;
+ struct usb_interface *intf;
+ int r;
+
+ r = parse_usbdevfs_streams(ps, arg, &num_streams, &num_eps,
+ &eps, &intf);
+ if (r)
+ return r;
+
+ destroy_async_on_interface(ps,
+ intf->altsetting[0].desc.bInterfaceNumber);
+
+ r = usb_alloc_streams(intf, eps, num_eps, num_streams, GFP_KERNEL);
+ kfree(eps);
+ return r;
+}
+
+static int proc_free_streams(struct dev_state *ps, void __user *arg)
+{
+ unsigned num_eps;
+ struct usb_host_endpoint **eps;
+ struct usb_interface *intf;
+ int r;
+
+ r = parse_usbdevfs_streams(ps, arg, NULL, &num_eps, &eps, &intf);
+ if (r)
+ return r;
+
+ destroy_async_on_interface(ps,
+ intf->altsetting[0].desc.bInterfaceNumber);
+
+ r = usb_free_streams(intf, eps, num_eps, GFP_KERNEL);
+ kfree(eps);
+ return r;
+}
+
/*
* NOTE: All requests here that have interface numbers as parameters
* are assuming that somehow the configuration has been prevented from
@@ -2159,6 +2297,12 @@ static long usbdev_do_ioctl(struct file *file, unsigned int cmd,
case USBDEVFS_DISCONNECT_CLAIM:
ret = proc_disconnect_claim(ps, p);
break;
+ case USBDEVFS_ALLOC_STREAMS:
+ ret = proc_alloc_streams(ps, p);
+ break;
+ case USBDEVFS_FREE_STREAMS:
+ ret = proc_free_streams(ps, p);
+ break;
}
usb_unlock_device(dev);
if (ret >= 0)
diff --git a/drivers/usb/core/driver.c b/drivers/usb/core/driver.c
index ab90a015682..08283d40616 100644
--- a/drivers/usb/core/driver.c
+++ b/drivers/usb/core/driver.c
@@ -312,9 +312,9 @@ static int usb_probe_interface(struct device *dev)
return error;
}
- id = usb_match_id(intf, driver->id_table);
+ id = usb_match_dynamic_id(intf, driver);
if (!id)
- id = usb_match_dynamic_id(intf, driver);
+ id = usb_match_id(intf, driver->id_table);
if (!id)
return error;
@@ -400,8 +400,9 @@ static int usb_unbind_interface(struct device *dev)
{
struct usb_driver *driver = to_usb_driver(dev->driver);
struct usb_interface *intf = to_usb_interface(dev);
+ struct usb_host_endpoint *ep, **eps = NULL;
struct usb_device *udev;
- int error, r, lpm_disable_error;
+ int i, j, error, r, lpm_disable_error;
intf->condition = USB_INTERFACE_UNBINDING;
@@ -425,6 +426,26 @@ static int usb_unbind_interface(struct device *dev)
driver->disconnect(intf);
usb_cancel_queued_reset(intf);
+ /* Free streams */
+ for (i = 0, j = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
+ ep = &intf->cur_altsetting->endpoint[i];
+ if (ep->streams == 0)
+ continue;
+ if (j == 0) {
+ eps = kmalloc(USB_MAXENDPOINTS * sizeof(void *),
+ GFP_KERNEL);
+ if (!eps) {
+ dev_warn(dev, "oom, leaking streams\n");
+ break;
+ }
+ }
+ eps[j++] = ep;
+ }
+ if (j) {
+ usb_free_streams(intf, eps, j, GFP_KERNEL);
+ kfree(eps);
+ }
+
/* Reset other interface state.
* We cannot do a Set-Interface if the device is suspended or
* if it is prepared for a system sleep (since installing a new
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index 2518c325075..9c4e2922b04 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -2049,7 +2049,7 @@ int usb_alloc_streams(struct usb_interface *interface,
{
struct usb_hcd *hcd;
struct usb_device *dev;
- int i;
+ int i, ret;
dev = interface_to_usbdev(interface);
hcd = bus_to_hcd(dev->bus);
@@ -2058,13 +2058,24 @@ int usb_alloc_streams(struct usb_interface *interface,
if (dev->speed != USB_SPEED_SUPER)
return -EINVAL;
- /* Streams only apply to bulk endpoints. */
- for (i = 0; i < num_eps; i++)
+ for (i = 0; i < num_eps; i++) {
+ /* Streams only apply to bulk endpoints. */
if (!usb_endpoint_xfer_bulk(&eps[i]->desc))
return -EINVAL;
+ /* Re-alloc is not allowed */
+ if (eps[i]->streams)
+ return -EINVAL;
+ }
- return hcd->driver->alloc_streams(hcd, dev, eps, num_eps,
+ ret = hcd->driver->alloc_streams(hcd, dev, eps, num_eps,
num_streams, mem_flags);
+ if (ret < 0)
+ return ret;
+
+ for (i = 0; i < num_eps; i++)
+ eps[i]->streams = ret;
+
+ return ret;
}
EXPORT_SYMBOL_GPL(usb_alloc_streams);
@@ -2078,8 +2089,7 @@ EXPORT_SYMBOL_GPL(usb_alloc_streams);
* Reverts a group of bulk endpoints back to not using stream IDs.
* Can fail if we are given bad arguments, or HCD is broken.
*
- * Return: On success, the number of allocated streams. On failure, a negative
- * error code.
+ * Return: 0 on success. On failure, a negative error code.
*/
int usb_free_streams(struct usb_interface *interface,
struct usb_host_endpoint **eps, unsigned int num_eps,
@@ -2087,19 +2097,26 @@ int usb_free_streams(struct usb_interface *interface,
{
struct usb_hcd *hcd;
struct usb_device *dev;
- int i;
+ int i, ret;
dev = interface_to_usbdev(interface);
hcd = bus_to_hcd(dev->bus);
if (dev->speed != USB_SPEED_SUPER)
return -EINVAL;
- /* Streams only apply to bulk endpoints. */
+ /* Double-free is not allowed */
for (i = 0; i < num_eps; i++)
- if (!eps[i] || !usb_endpoint_xfer_bulk(&eps[i]->desc))
+ if (!eps[i] || !eps[i]->streams)
return -EINVAL;
- return hcd->driver->free_streams(hcd, dev, eps, num_eps, mem_flags);
+ ret = hcd->driver->free_streams(hcd, dev, eps, num_eps, mem_flags);
+ if (ret < 0)
+ return ret;
+
+ for (i = 0; i < num_eps; i++)
+ eps[i]->streams = 0;
+
+ return ret;
}
EXPORT_SYMBOL_GPL(usb_free_streams);
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 64ea21971be..5da5394127e 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -141,19 +141,27 @@ static int usb_device_supports_lpm(struct usb_device *udev)
return 0;
}
- /* All USB 3.0 must support LPM, but we need their max exit latency
- * information from the SuperSpeed Extended Capabilities BOS descriptor.
+ /*
+ * According to the USB 3.0 spec, all USB 3.0 devices must support LPM.
+ * However, there are some that don't, and they set the U1/U2 exit
+ * latencies to zero.
*/
if (!udev->bos->ss_cap) {
- dev_warn(&udev->dev, "No LPM exit latency info found. "
- "Power management will be impacted.\n");
+ dev_info(&udev->dev, "No LPM exit latency info found, disabling LPM.\n");
return 0;
}
- if (udev->parent->lpm_capable)
- return 1;
- dev_warn(&udev->dev, "Parent hub missing LPM exit latency info. "
- "Power management will be impacted.\n");
+ if (udev->bos->ss_cap->bU1devExitLat == 0 &&
+ udev->bos->ss_cap->bU2DevExitLat == 0) {
+ if (udev->parent)
+ dev_info(&udev->dev, "LPM exit latency is zeroed, disabling LPM.\n");
+ else
+ dev_info(&udev->dev, "We don't know the algorithms for LPM for this host, disabling LPM.\n");
+ return 0;
+ }
+
+ if (!udev->parent || udev->parent->lpm_capable)
+ return 1;
return 0;
}
@@ -499,7 +507,8 @@ static void led_work (struct work_struct *work)
changed++;
}
if (changed)
- schedule_delayed_work(&hub->leds, LED_CYCLE_PERIOD);
+ queue_delayed_work(system_power_efficient_wq,
+ &hub->leds, LED_CYCLE_PERIOD);
}
/* use a short timeout for hub/port status fetches */
@@ -1041,7 +1050,8 @@ static void hub_activate(struct usb_hub *hub, enum hub_activation_type type)
if (type == HUB_INIT) {
delay = hub_power_on(hub, false);
PREPARE_DELAYED_WORK(&hub->init_work, hub_init_func2);
- schedule_delayed_work(&hub->init_work,
+ queue_delayed_work(system_power_efficient_wq,
+ &hub->init_work,
msecs_to_jiffies(delay));
/* Suppress autosuspend until init is done */
@@ -1195,7 +1205,8 @@ static void hub_activate(struct usb_hub *hub, enum hub_activation_type type)
/* Don't do a long sleep inside a workqueue routine */
if (type == HUB_INIT2) {
PREPARE_DELAYED_WORK(&hub->init_work, hub_init_func3);
- schedule_delayed_work(&hub->init_work,
+ queue_delayed_work(system_power_efficient_wq,
+ &hub->init_work,
msecs_to_jiffies(delay));
return; /* Continues at init3: below */
} else {
@@ -1209,7 +1220,8 @@ static void hub_activate(struct usb_hub *hub, enum hub_activation_type type)
if (status < 0)
dev_err(hub->intfdev, "activate --> %d\n", status);
if (hub->has_indicators && blinkenlights)
- schedule_delayed_work(&hub->leds, LED_CYCLE_PERIOD);
+ queue_delayed_work(system_power_efficient_wq,
+ &hub->leds, LED_CYCLE_PERIOD);
/* Scan all ports that need attention */
kick_khubd(hub);
@@ -3958,7 +3970,7 @@ static void hub_set_initial_usb2_lpm_policy(struct usb_device *udev)
connect_type = usb_get_hub_port_connect_type(udev->parent,
udev->portnum);
- if ((udev->bos->ext_cap->bmAttributes & USB_BESL_SUPPORT) ||
+ if ((udev->bos->ext_cap->bmAttributes & cpu_to_le32(USB_BESL_SUPPORT)) ||
connect_type == USB_PORT_CONNECT_TYPE_HARD_WIRED) {
udev->usb2_hw_lpm_allowed = 1;
usb_set_usb2_hardware_lpm(udev, 1);
@@ -4107,8 +4119,12 @@ hub_port_init (struct usb_hub *hub, struct usb_device *udev, int port1,
did_new_scheme = true;
retval = hub_enable_device(udev);
- if (retval < 0)
+ if (retval < 0) {
+ dev_err(&udev->dev,
+ "hub failed to enable device, error %d\n",
+ retval);
goto fail;
+ }
#define GET_DESCRIPTOR_BUFSIZE 64
buf = kmalloc(GET_DESCRIPTOR_BUFSIZE, GFP_NOIO);
@@ -4311,7 +4327,8 @@ check_highspeed (struct usb_hub *hub, struct usb_device *udev, int port1)
/* hub LEDs are probably harder to miss than syslog */
if (hub->has_indicators) {
hub->indicator[port1-1] = INDICATOR_GREEN_BLINK;
- schedule_delayed_work (&hub->leds, 0);
+ queue_delayed_work(system_power_efficient_wq,
+ &hub->leds, 0);
}
}
kfree(qual);
@@ -4540,7 +4557,9 @@ static void hub_port_connect_change(struct usb_hub *hub, int port1,
if (hub->has_indicators) {
hub->indicator[port1-1] =
INDICATOR_AMBER_BLINK;
- schedule_delayed_work (&hub->leds, 0);
+ queue_delayed_work(
+ system_power_efficient_wq,
+ &hub->leds, 0);
}
status = -ENOTCONN; /* Don't retry */
goto loop_disable;
@@ -4739,6 +4758,8 @@ static void hub_events(void)
/* deal with port status changes */
for (i = 1; i <= hdev->maxchild; i++) {
+ struct usb_device *udev = hub->ports[i - 1]->child;
+
if (test_bit(i, hub->busy_bits))
continue;
connect_change = test_bit(i, hub->change_bits);
@@ -4837,8 +4858,6 @@ static void hub_events(void)
*/
if (hub_port_warm_reset_required(hub, portstatus)) {
int status;
- struct usb_device *udev =
- hub->ports[i - 1]->child;
dev_dbg(hub_dev, "warm reset port %d\n", i);
if (!udev ||
@@ -4855,6 +4874,24 @@ static void hub_events(void)
usb_unlock_device(udev);
connect_change = 0;
}
+ /*
+ * On disconnect USB3 protocol ports transit from U0 to
+ * SS.Inactive to Rx.Detect. If this happens a warm-
+ * reset is not needed, but a (re)connect may happen
+ * before khubd runs and sees the disconnect, and the
+ * device may be an unknown state.
+ *
+ * If the port went through SS.Inactive without khubd
+ * seeing it the C_LINK_STATE change flag will be set,
+ * and we reset the dev to put it in a known state.
+ */
+ } else if (udev && hub_is_superspeed(hub->hdev) &&
+ (portchange & USB_PORT_STAT_C_LINK_STATE) &&
+ (portstatus & USB_PORT_STAT_CONNECTION)) {
+ usb_lock_device(udev);
+ usb_reset_device(udev);
+ usb_unlock_device(udev);
+ connect_change = 0;
}
if (connect_change)
@@ -5112,7 +5149,7 @@ static int usb_reset_and_verify_device(struct usb_device *udev)
struct usb_hcd *hcd = bus_to_hcd(udev->bus);
struct usb_device_descriptor descriptor = udev->descriptor;
struct usb_host_bos *bos;
- int i, ret = 0;
+ int i, j, ret = 0;
int port1 = udev->portnum;
if (udev->state == USB_STATE_NOTATTACHED ||
@@ -5238,6 +5275,9 @@ static int usb_reset_and_verify_device(struct usb_device *udev)
ret);
goto re_enumerate;
}
+ /* Resetting also frees any allocated streams */
+ for (j = 0; j < intf->cur_altsetting->desc.bNumEndpoints; j++)
+ intf->cur_altsetting->endpoint[j].streams = 0;
}
done:
diff --git a/drivers/usb/core/message.c b/drivers/usb/core/message.c
index f829a1aad1c..96469574103 100644
--- a/drivers/usb/core/message.c
+++ b/drivers/usb/core/message.c
@@ -1293,8 +1293,7 @@ int usb_set_interface(struct usb_device *dev, int interface, int alternate)
struct usb_interface *iface;
struct usb_host_interface *alt;
struct usb_hcd *hcd = bus_to_hcd(dev->bus);
- int ret;
- int manual = 0;
+ int i, ret, manual = 0;
unsigned int epaddr;
unsigned int pipe;
@@ -1329,6 +1328,10 @@ int usb_set_interface(struct usb_device *dev, int interface, int alternate)
mutex_unlock(hcd->bandwidth_mutex);
return -ENOMEM;
}
+ /* Changing alt-setting also frees any allocated streams */
+ for (i = 0; i < iface->cur_altsetting->desc.bNumEndpoints; i++)
+ iface->cur_altsetting->endpoint[i].streams = 0;
+
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",
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-04-09 11:59:57 +0000