ALSA: usb-audio: Remove superfluous bLength checks

Now that we got the more comprehensive validation code for USB-audio
descriptors, the check of overflow in each descriptor unit parser
became superfluous.  Drop some of the obvious cases.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 6 insertions, 8 deletions

diff --git a/sound/usb/clock.c b/sound/usb/clock.c
index 72e9bdf76115..6b8c14f9b5d4 100644
--- a/sound/usb/clock.c
+++ b/sound/usb/clock.c
@@ -38,39 +38,37 @@ static void *find_uac_clock_desc(struct usb_host_interface *iface, int id,
 static bool validate_clock_source_v2(void *p, int id)
 {
 	struct uac_clock_source_descriptor *cs = p;
-	return cs->bLength == sizeof(*cs) && cs->bClockID == id;
+	return cs->bClockID == id;
 }
 
 static bool validate_clock_source_v3(void *p, int id)
 {
 	struct uac3_clock_source_descriptor *cs = p;
-	return cs->bLength == sizeof(*cs) && cs->bClockID == id;
+	return cs->bClockID == id;
 }
 
 static bool validate_clock_selector_v2(void *p, int id)
 {
 	struct uac_clock_selector_descriptor *cs = p;
-	return cs->bLength >= sizeof(*cs) && cs->bClockID == id &&
-		cs->bLength == 7 + cs->bNrInPins;
+	return cs->bClockID == id;
 }
 
 static bool validate_clock_selector_v3(void *p, int id)
 {
 	struct uac3_clock_selector_descriptor *cs = p;
-	return cs->bLength >= sizeof(*cs) && cs->bClockID == id &&
-		cs->bLength == 11 + cs->bNrInPins;
+	return cs->bClockID == id;
 }
 
 static bool validate_clock_multiplier_v2(void *p, int id)
 {
 	struct uac_clock_multiplier_descriptor *cs = p;
-	return cs->bLength == sizeof(*cs) && cs->bClockID == id;
+	return cs->bClockID == id;
 }
 
 static bool validate_clock_multiplier_v3(void *p, int id)
 {
 	struct uac3_clock_multiplier_descriptor *cs = p;
-	return cs->bLength == sizeof(*cs) && cs->bClockID == id;
+	return cs->bClockID == id;
 }
 
 #define DEFINE_FIND_HELPER(name, obj, validator, type)		\