[ALSA] usb-audio - cache vendor/product IDs
USB generic driver
Cache the decoded values of idVendor/idProduct to get rid of most of
those ugly le16_to_cpu() calls.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
diff --git a/sound/usb/usbaudio.h b/sound/usb/usbaudio.h
index 41d842d..aedb42a 100644
--- a/sound/usb/usbaudio.h
+++ b/sound/usb/usbaudio.h
@@ -118,6 +118,11 @@
/* maximum number of endpoints per interface */
#define MIDI_MAX_ENDPOINTS 2
+/* handling of USB vendor/product ID pairs as 32-bit numbers */
+#define USB_ID(vendor, product) (((vendor) << 16) | (product))
+#define USB_ID_VENDOR(id) ((id) >> 16)
+#define USB_ID_PRODUCT(id) ((u16)(id))
+
/*
*/
@@ -127,6 +132,7 @@
int index;
struct usb_device *dev;
snd_card_t *card;
+ u32 usb_id;
int shutdown;
int num_interfaces;