xiaoxiang781216 commented on code in PR #7491:
URL: https://github.com/apache/incubator-nuttx/pull/7491#discussion_r1010087395


##########
include/nuttx/usb/usb.h:
##########
@@ -65,10 +65,10 @@
 #define MSBYTE(u16)                             ((u16) >> 8)     /* Get MS 
byte from uint16_t */
 #define LSBYTE(u16)                             ((u16) & 0xff)   /* Get LS 
byte from uint16_t */
 
-#define GETUINT16(p)                            (((uint16_t)p[1] << 8) | 
(uint16_t)p[0])
-#define GETUINT32(p)                            (((uint32_t)p[3] << 24) | \
-                                                 ((uint32_t)p[2] << 16) | \
-                                                 ((uint32_t)p[1] << 8) | 
(uint32_t)p[0])
+#define GETUINT16(p)                            ((uint16_t)((p[1] << 8) | 
p[0]))

Review Comment:
   Yes, variable parameters list or expression will promote uint16_t to int, 
but it isn't related to this problem. GETUINT16 should ensure the result type 
is uint16_t regardless whether the promotion happen in the following evaluation.



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