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path: root/drivers/usb/core/hub.c
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Diffstat (limited to 'drivers/usb/core/hub.c')
-rw-r--r--drivers/usb/core/hub.c18
1 files changed, 10 insertions, 8 deletions
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 25a7422ee657..8fb484984c86 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -2324,12 +2324,16 @@ static unsigned hub_is_wusb(struct usb_hub *hub)
2324static int hub_port_reset(struct usb_hub *hub, int port1, 2324static int hub_port_reset(struct usb_hub *hub, int port1,
2325 struct usb_device *udev, unsigned int delay, bool warm); 2325 struct usb_device *udev, unsigned int delay, bool warm);
2326 2326
2327/* Is a USB 3.0 port in the Inactive state? */ 2327/* Is a USB 3.0 port in the Inactive or Complinance Mode state?
2328static bool hub_port_inactive(struct usb_hub *hub, u16 portstatus) 2328 * Port worm reset is required to recover
2329 */
2330static bool hub_port_warm_reset_required(struct usb_hub *hub, u16 portstatus)
2329{ 2331{
2330 return hub_is_superspeed(hub->hdev) && 2332 return hub_is_superspeed(hub->hdev) &&
2331 (portstatus & USB_PORT_STAT_LINK_STATE) == 2333 (((portstatus & USB_PORT_STAT_LINK_STATE) ==
2332 USB_SS_PORT_LS_SS_INACTIVE; 2334 USB_SS_PORT_LS_SS_INACTIVE) ||
2335 ((portstatus & USB_PORT_STAT_LINK_STATE) ==
2336 USB_SS_PORT_LS_COMP_MOD)) ;
2333} 2337}
2334 2338
2335static int hub_port_wait_reset(struct usb_hub *hub, int port1, 2339static int hub_port_wait_reset(struct usb_hub *hub, int port1,
@@ -2365,7 +2369,7 @@ static int hub_port_wait_reset(struct usb_hub *hub, int port1,
2365 * 2369 *
2366 * See https://bugzilla.kernel.org/show_bug.cgi?id=41752 2370 * See https://bugzilla.kernel.org/show_bug.cgi?id=41752
2367 */ 2371 */
2368 if (hub_port_inactive(hub, portstatus)) { 2372 if (hub_port_warm_reset_required(hub, portstatus)) {
2369 int ret; 2373 int ret;
2370 2374
2371 if ((portchange & USB_PORT_STAT_C_CONNECTION)) 2375 if ((portchange & USB_PORT_STAT_C_CONNECTION))
@@ -4408,9 +4412,7 @@ static void hub_events(void)
4408 /* Warm reset a USB3 protocol port if it's in 4412 /* Warm reset a USB3 protocol port if it's in
4409 * SS.Inactive state. 4413 * SS.Inactive state.
4410 */ 4414 */
4411 if (hub_is_superspeed(hub->hdev) && 4415 if (hub_port_warm_reset_required(hub, portstatus)) {
4412 (portstatus & USB_PORT_STAT_LINK_STATE)
4413 == USB_SS_PORT_LS_SS_INACTIVE) {
4414 dev_dbg(hub_dev, "warm reset port %d\n", i); 4416 dev_dbg(hub_dev, "warm reset port %d\n", i);
4415 hub_port_reset(hub, i, NULL, 4417 hub_port_reset(hub, i, NULL,
4416 HUB_BH_RESET_TIME, true); 4418 HUB_BH_RESET_TIME, true);