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usb: ch9: make usb_endpoint_maxp() return only packet size

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Now that we have a helper to gather periodic
endpoints' multiplier bits from wMaxPacketSize and
every driver is using it, we can safely make sure
that usb_endpoint_maxp() returns only bits 10:0 of
wMaxPacketSize which is where the actual packet size
lies.

Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This commit is contained in:
Felipe Balbi 2016-09-28 13:42:17 +03:00
parent 6ddcabc2aa
commit abb621844f
1 changed files with 3 additions and 2 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

5
include/uapi/linux/usb/ch9.h
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@ -423,6 +423,7 @@ struct usb_endpoint_descriptor {
#define USB_ENDPOINT_XFER_INT 3 #define USB_ENDPOINT_XFER_INT 3
#define USB_ENDPOINT_MAX_ADJUSTABLE 0x80 #define USB_ENDPOINT_MAX_ADJUSTABLE 0x80
#define USB_ENDPOINT_MAXP_MASK 0x07ff
#define USB_EP_MAXP_MULT_SHIFT 11 #define USB_EP_MAXP_MULT_SHIFT 11
#define USB_EP_MAXP_MULT_MASK (3 << USB_EP_MAXP_MULT_SHIFT) #define USB_EP_MAXP_MULT_MASK (3 << USB_EP_MAXP_MULT_SHIFT)
#define USB_EP_MAXP_MULT(m) \ #define USB_EP_MAXP_MULT(m) \
@ -628,11 +629,11 @@ static inline int usb_endpoint_is_isoc_out(
* usb_endpoint_maxp - get endpoint's max packet size * usb_endpoint_maxp - get endpoint's max packet size
* @epd: endpoint to be checked * @epd: endpoint to be checked
* *
* Returns @epd's max packet * Returns @epd's max packet bits [10:0]
*/ */
static inline int usb_endpoint_maxp(const struct usb_endpoint_descriptor *epd) static inline int usb_endpoint_maxp(const struct usb_endpoint_descriptor *epd)
{ {
return __le16_to_cpu(epd->wMaxPacketSize); return __le16_to_cpu(epd->wMaxPacketSize) & USB_ENDPOINT_MAXP_MASK;
} }
/** /**