USB: hub: Fix the broken detection of USB3 device in SMSC hub

commit 1208f9e1d758c991b0a46a1bd60c616b906bbe27 upstream.

Renesas R-Car H3ULCB + Kingfisher Infotainment Board is either not able
to detect the USB3.0 mass storage devices or is detecting those as
USB2.0 high speed devices.

The explanation given by Renesas is that, due to a HW issue, the XHCI
driver does not wake up after going to sleep on connecting a USB3.0
device.

In order to mitigate that, disable the auto-suspend feature
specifically for SMSC hubs from hub_probe() function, as a quirk.

Renesas Kingfisher Infotainment Board has two USB3.0 ports (CN2) which
are connected via USB5534B 4-port SuperSpeed/Hi-Speed, low-power,
configurable hub controller.

[1] SanDisk USB 3.0 device detected as USB-2.0 before the patch
 [   74.036390] usb 5-1.1: new high-speed USB device number 4 using xhci-hcd
 [   74.061598] usb 5-1.1: New USB device found, idVendor=0781, idProduct=5581, bcdDevice= 1.00
 [   74.069976] usb 5-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
 [   74.077303] usb 5-1.1: Product: Ultra
 [   74.080980] usb 5-1.1: Manufacturer: SanDisk
 [   74.085263] usb 5-1.1: SerialNumber: 4C530001110208116550

[2] SanDisk USB 3.0 device detected as USB-3.0 after the patch
 [   34.565078] usb 6-1.1: new SuperSpeed Gen 1 USB device number 3 using xhci-hcd
 [   34.588719] usb 6-1.1: New USB device found, idVendor=0781, idProduct=5581, bcdDevice= 1.00
 [   34.597098] usb 6-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
 [   34.604430] usb 6-1.1: Product: Ultra
 [   34.608110] usb 6-1.1: Manufacturer: SanDisk
 [   34.612397] usb 6-1.1: SerialNumber: 4C530001110208116550

Suggested-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Hardik Gajjar <hgajjar@de.adit-jv.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Tested-by: Eugeniu Rosca <erosca@de.adit-jv.com>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/1580989763-32291-1-git-send-email-hgajjar@de.adit-jv.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 327f7bf..27486b0 100644 (file)
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -36,7 +36,9 @@
 #include "otg_whitelist.h"
 
 #define USB_VENDOR_GENESYS_LOGIC               0x05e3
+#define USB_VENDOR_SMSC                                0x0424
 #define HUB_QUIRK_CHECK_PORT_AUTOSUSPEND       0x01
+#define HUB_QUIRK_DISABLE_AUTOSUSPEND          0x02
 
 #define USB_TP_TRANSMISSION_DELAY      40      /* ns */
 #define USB_TP_TRANSMISSION_DELAY_MAX  65535   /* ns */
@@ -1695,6 +1697,10 @@ static void hub_disconnect(struct usb_interface *intf)
        kfree(hub->buffer);
 
        pm_suspend_ignore_children(&intf->dev, false);
+
+       if (hub->quirk_disable_autosuspend)
+               usb_autopm_put_interface(intf);
+
        kref_put(&hub->kref, hub_release);
 }
 
@@ -1825,6 +1831,11 @@ static int hub_probe(struct usb_interface *intf, const struct usb_device_id *id)
        if (id->driver_info & HUB_QUIRK_CHECK_PORT_AUTOSUSPEND)
                hub->quirk_check_port_auto_suspend = 1;
 
+       if (id->driver_info & HUB_QUIRK_DISABLE_AUTOSUSPEND) {
+               hub->quirk_disable_autosuspend = 1;
+               usb_autopm_get_interface(intf);
+       }
+
        if (hub_configure(hub, &desc->endpoint[0].desc) >= 0)
                return 0;
 
@@ -5405,6 +5416,10 @@ out_hdev_lock:
 }
 
 static const struct usb_device_id hub_id_table[] = {
+    { .match_flags = USB_DEVICE_ID_MATCH_VENDOR | USB_DEVICE_ID_MATCH_INT_CLASS,
+      .idVendor = USB_VENDOR_SMSC,
+      .bInterfaceClass = USB_CLASS_HUB,
+      .driver_info = HUB_QUIRK_DISABLE_AUTOSUSPEND},
     { .match_flags = USB_DEVICE_ID_MATCH_VENDOR
                        | USB_DEVICE_ID_MATCH_INT_CLASS,
       .idVendor = USB_VENDOR_GENESYS_LOGIC,

diff --git a/drivers/usb/core/hub.h b/drivers/usb/core/hub.h
index 4accfb6..d0bbbd7 100644 (file)
--- a/drivers/usb/core/hub.h
+++ b/drivers/usb/core/hub.h
@@ -61,6 +61,7 @@ struct usb_hub {
        unsigned                quiescing:1;
        unsigned                disconnected:1;
        unsigned                in_reset:1;
+       unsigned                quirk_disable_autosuspend:1;
 
        unsigned                quirk_check_port_auto_suspend:1;