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.c25
1 files changed, 22 insertions, 3 deletions
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 3c54b218301c..0ff47eeffb49 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -151,6 +151,10 @@ int usb_device_supports_lpm(struct usb_device *udev)
if (udev->quirks & USB_QUIRK_NO_LPM)
return 0;
+ /* Skip if the device BOS descriptor couldn't be read */
+ if (!udev->bos)
+ return 0;
+
/* USB 2.1 (and greater) devices indicate LPM support through
* their USB 2.0 Extended Capabilities BOS descriptor.
*/
@@ -327,6 +331,10 @@ static void usb_set_lpm_parameters(struct usb_device *udev)
if (!udev->lpm_capable || udev->speed < USB_SPEED_SUPER)
return;
+ /* Skip if the device BOS descriptor couldn't be read */
+ if (!udev->bos)
+ return;
+
hub = usb_hub_to_struct_hub(udev->parent);
/* It doesn't take time to transition the roothub into U0, since it
* doesn't have an upstream link.
@@ -2704,13 +2712,17 @@ out_authorized:
static enum usb_ssp_rate get_port_ssp_rate(struct usb_device *hdev,
u32 ext_portstatus)
{
- struct usb_ssp_cap_descriptor *ssp_cap = hdev->bos->ssp_cap;
+ struct usb_ssp_cap_descriptor *ssp_cap;
u32 attr;
u8 speed_id;
u8 ssac;
u8 lanes;
int i;
+ if (!hdev->bos)
+ goto out;
+
+ ssp_cap = hdev->bos->ssp_cap;
if (!ssp_cap)
goto out;
@@ -4215,8 +4227,15 @@ static void usb_enable_link_state(struct usb_hcd *hcd, struct usb_device *udev,
enum usb3_link_state state)
{
int timeout;
- __u8 u1_mel = udev->bos->ss_cap->bU1devExitLat;
- __le16 u2_mel = udev->bos->ss_cap->bU2DevExitLat;
+ __u8 u1_mel;
+ __le16 u2_mel;
+
+ /* Skip if the device BOS descriptor couldn't be read */
+ if (!udev->bos)
+ return;
+
+ u1_mel = udev->bos->ss_cap->bU1devExitLat;
+ u2_mel = udev->bos->ss_cap->bU2DevExitLat;
/* If the device says it doesn't have *any* exit latency to come out of
* U1 or U2, it's probably lying. Assume it doesn't implement that link