summaryrefslogtreecommitdiff
path: root/drivers/usb/core/hub.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/usb/core/hub.c')
-rw-r--r--drivers/usb/core/hub.c61
1 files changed, 45 insertions, 16 deletions
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 86658a81d284..47a1c8bddf86 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -1110,7 +1110,10 @@ static void hub_activate(struct usb_hub *hub, enum hub_activation_type type)
} else {
hub_power_on(hub, true);
}
- }
+ /* Give some time on remote wakeup to let links to transit to U0 */
+ } else if (hub_is_superspeed(hub->hdev))
+ msleep(20);
+
init2:
/*
@@ -1225,7 +1228,7 @@ static void hub_activate(struct usb_hub *hub, enum hub_activation_type type)
*/
if (portchange || (hub_is_superspeed(hub->hdev) &&
port_resumed))
- set_bit(port1, hub->change_bits);
+ set_bit(port1, hub->event_bits);
} else if (udev->persist_enabled) {
#ifdef CONFIG_PM
@@ -2777,6 +2780,8 @@ static unsigned hub_is_wusb(struct usb_hub *hub)
#define PORT_INIT_TRIES 4
#endif /* CONFIG_USB_FEW_INIT_RETRIES */
+#define DETECT_DISCONNECT_TRIES 5
+
#define HUB_ROOT_RESET_TIME 60 /* times are in msec */
#define HUB_SHORT_RESET_TIME 10
#define HUB_BH_RESET_TIME 50
@@ -3570,7 +3575,7 @@ static int finish_port_resume(struct usb_device *udev)
* This routine should only be called when persist is enabled.
*/
static int wait_for_connected(struct usb_device *udev,
- struct usb_hub *hub, int *port1,
+ struct usb_hub *hub, int port1,
u16 *portchange, u16 *portstatus)
{
int status = 0, delay_ms = 0;
@@ -3584,7 +3589,7 @@ static int wait_for_connected(struct usb_device *udev,
}
msleep(20);
delay_ms += 20;
- status = hub_port_status(hub, *port1, portstatus, portchange);
+ status = hub_port_status(hub, port1, portstatus, portchange);
}
dev_dbg(&udev->dev, "Waited %dms for CONNECT\n", delay_ms);
return status;
@@ -3690,7 +3695,7 @@ int usb_port_resume(struct usb_device *udev, pm_message_t msg)
}
if (udev->persist_enabled)
- status = wait_for_connected(udev, hub, &port1, &portchange,
+ status = wait_for_connected(udev, hub, port1, &portchange,
&portstatus);
status = check_port_resume_type(udev,
@@ -4700,8 +4705,6 @@ hub_port_init(struct usb_hub *hub, struct usb_device *udev, int port1,
if (oldspeed == USB_SPEED_LOW)
delay = HUB_LONG_RESET_TIME;
- mutex_lock(hcd->address0_mutex);
-
/* Reset the device; full speed may morph to high speed */
/* FIXME a USB 2.0 device may morph into SuperSpeed on reset. */
retval = hub_port_reset(hub, port1, udev, delay, false);
@@ -5016,7 +5019,6 @@ fail:
hub_port_disable(hub, port1, 0);
update_devnum(udev, devnum); /* for disconnect processing */
}
- mutex_unlock(hcd->address0_mutex);
return retval;
}
@@ -5191,6 +5193,7 @@ static void hub_port_connect(struct usb_hub *hub, int port1, u16 portstatus,
struct usb_port *port_dev = hub->ports[port1 - 1];
struct usb_device *udev = port_dev->child;
static int unreliable_port = -1;
+ bool retry_locked;
/* Disconnect any existing devices under this port */
if (udev) {
@@ -5246,8 +5249,11 @@ static void hub_port_connect(struct usb_hub *hub, int port1, u16 portstatus,
unit_load = 100;
status = 0;
- for (i = 0; i < PORT_INIT_TRIES; i++) {
+ for (i = 0; i < PORT_INIT_TRIES; i++) {
+ usb_lock_port(port_dev);
+ mutex_lock(hcd->address0_mutex);
+ retry_locked = true;
/* reallocate for each attempt, since references
* to the previous one can escape in various ways
*/
@@ -5255,6 +5261,8 @@ static void hub_port_connect(struct usb_hub *hub, int port1, u16 portstatus,
if (!udev) {
dev_err(&port_dev->dev,
"couldn't allocate usb_device\n");
+ mutex_unlock(hcd->address0_mutex);
+ usb_unlock_port(port_dev);
goto done;
}
@@ -5276,12 +5284,14 @@ static void hub_port_connect(struct usb_hub *hub, int port1, u16 portstatus,
}
/* reset (non-USB 3.0 devices) and get descriptor */
- usb_lock_port(port_dev);
status = hub_port_init(hub, udev, port1, i);
- usb_unlock_port(port_dev);
if (status < 0)
goto loop;
+ mutex_unlock(hcd->address0_mutex);
+ usb_unlock_port(port_dev);
+ retry_locked = false;
+
if (udev->quirks & USB_QUIRK_DELAY_INIT)
msleep(2000);
@@ -5374,6 +5384,10 @@ loop:
usb_ep0_reinit(udev);
release_devnum(udev);
hub_free_dev(udev);
+ if (retry_locked) {
+ mutex_unlock(hcd->address0_mutex);
+ usb_unlock_port(port_dev);
+ }
usb_put_dev(udev);
if ((status == -ENOTCONN) || (status == -ENOTSUPP))
break;
@@ -5534,6 +5548,7 @@ static void port_event(struct usb_hub *hub, int port1)
struct usb_device *udev = port_dev->child;
struct usb_device *hdev = hub->hdev;
u16 portstatus, portchange;
+ int i = 0;
connect_change = test_bit(port1, hub->change_bits);
clear_bit(port1, hub->event_bits);
@@ -5610,17 +5625,27 @@ static void port_event(struct usb_hub *hub, int port1)
connect_change = 1;
/*
- * Warm reset a USB3 protocol port if it's in
- * SS.Inactive state.
+ * Avoid trying to recover a USB3 SS.Inactive port with a warm reset if
+ * the device was disconnected. A 12ms disconnect detect timer in
+ * SS.Inactive state transitions the port to RxDetect automatically.
+ * SS.Inactive link error state is common during device disconnect.
*/
- if (hub_port_warm_reset_required(hub, port1, portstatus)) {
- dev_dbg(&port_dev->dev, "do warm reset\n");
- if (!udev || !(portstatus & USB_PORT_STAT_CONNECTION)
+ while (hub_port_warm_reset_required(hub, port1, portstatus)) {
+ if ((i++ < DETECT_DISCONNECT_TRIES) && udev) {
+ u16 unused;
+
+ msleep(20);
+ hub_port_status(hub, port1, &portstatus, &unused);
+ dev_dbg(&port_dev->dev, "Wait for inactive link disconnect detect\n");
+ continue;
+ } else if (!udev || !(portstatus & USB_PORT_STAT_CONNECTION)
|| udev->state == USB_STATE_NOTATTACHED) {
+ dev_dbg(&port_dev->dev, "do warm reset, port only\n");
if (hub_port_reset(hub, port1, NULL,
HUB_BH_RESET_TIME, true) < 0)
hub_port_disable(hub, port1, 1);
} else {
+ dev_dbg(&port_dev->dev, "do warm reset, full device\n");
usb_unlock_port(port_dev);
usb_lock_device(udev);
usb_reset_device(udev);
@@ -5628,6 +5653,7 @@ static void port_event(struct usb_hub *hub, int port1)
usb_lock_port(port_dev);
connect_change = 0;
}
+ break;
}
if (connect_change)
@@ -5915,6 +5941,8 @@ static int usb_reset_and_verify_device(struct usb_device *udev)
bos = udev->bos;
udev->bos = NULL;
+ mutex_lock(hcd->address0_mutex);
+
for (i = 0; i < PORT_INIT_TRIES; ++i) {
/* ep0 maxpacket size may change; let the HCD know about it.
@@ -5924,6 +5952,7 @@ static int usb_reset_and_verify_device(struct usb_device *udev)
if (ret >= 0 || ret == -ENOTCONN || ret == -ENODEV)
break;
}
+ mutex_unlock(hcd->address0_mutex);
if (ret < 0)
goto re_enumerate;
generated by cgit v1.2.3 (git 2.46.0) at 2025-09-05 23:14:30 +0000