diff options
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/gadget/composite.c | 22 |
1 files changed, 19 insertions, 3 deletions
diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c index de9ffd60fcfa..3d3cdc5ed20d 100644 --- a/drivers/usb/gadget/composite.c +++ b/drivers/usb/gadget/composite.c @@ -66,20 +66,36 @@ function_descriptors(struct usb_function *f, { struct usb_descriptor_header **descriptors; + /* + * NOTE: we try to help gadget drivers which might not be setting + * max_speed appropriately. + */ + switch (speed) { case USB_SPEED_SUPER_PLUS: descriptors = f->ssp_descriptors; - break; + if (descriptors) + break; + /* FALLTHROUGH */ case USB_SPEED_SUPER: descriptors = f->ss_descriptors; - break; + if (descriptors) + break; + /* FALLTHROUGH */ case USB_SPEED_HIGH: descriptors = f->hs_descriptors; - break; + if (descriptors) + break; + /* FALLTHROUGH */ default: descriptors = f->fs_descriptors; } + /* + * if we can't find any descriptors at all, then this gadget deserves to + * Oops with a NULL pointer dereference + */ + return descriptors; } |