diff options
Diffstat (limited to 'include/linux/usb/gadget.h')
| -rw-r--r-- | include/linux/usb/gadget.h | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h index 6b3908738d7d..c76482df86d5 100644 --- a/include/linux/usb/gadget.h +++ b/include/linux/usb/gadget.h @@ -588,8 +588,20 @@ static inline struct usb_gadget *dev_to_usb_gadget(struct device *dev) /** + * usb_ep_align - returns @len aligned to ep's maxpacketsize. + * @ep: the endpoint whose maxpacketsize is used to align @len + * @len: buffer size's length to align to @ep's maxpacketsize + * + * This helper is used to align buffer's size to an ep's maxpacketsize. + */ +static inline size_t usb_ep_align(struct usb_ep *ep, size_t len) +{ + return round_up(len, (size_t)le16_to_cpu(ep->desc->wMaxPacketSize)); +} + +/** * usb_ep_align_maybe - returns @len aligned to ep's maxpacketsize if gadget - * requires quirk_ep_out_aligned_size, otherwise reguens len. + * requires quirk_ep_out_aligned_size, otherwise returns len. * @g: controller to check for quirk * @ep: the endpoint whose maxpacketsize is used to align @len * @len: buffer size's length to align to @ep's maxpacketsize @@ -600,8 +612,7 @@ static inline struct usb_gadget *dev_to_usb_gadget(struct device *dev) static inline size_t usb_ep_align_maybe(struct usb_gadget *g, struct usb_ep *ep, size_t len) { - return !g->quirk_ep_out_aligned_size ? len : - round_up(len, (size_t)ep->desc->wMaxPacketSize); + return g->quirk_ep_out_aligned_size ? usb_ep_align(ep, len) : len; } /** |