ath_hw: Fix bssid mask documentation (a455c57e) · Commits · 戴 / test

drivers/net/wireless/ath/hw.c

+4 −6

Original line number	Diff line number	Diff line
		@@ -43,7 +43,7 @@
		* set of ~ ( MAC XOR BSSID ) for all bssids we handle.
		*
		* When you do this you are essentially computing the common bits of all your
		* BSSes. Later it is assumed the harware will "and" (&) the BSSID mask with
		* BSSes. Later it is assumed the hardware will "and" (&) the BSSID mask with
		* the MAC address to obtain the relevant bits and compare the result with
		* (frame's BSSID & mask) to see if they match.
		*
		@@ -71,8 +71,8 @@
		* On loop iteration for BSSID-02:
		* bssid_mask &= ~(0001 ^ 1001)
		* bssid_mask = (1010) & ~(0001 ^ 1001)
		* bssid_mask = (1010) & ~(1001)
		* bssid_mask = (1010) & (0110)
		* bssid_mask = (1010) & ~(1000)
		* bssid_mask = (1010) & (0111)
		* bssid_mask = 0010
		*
		* A bssid_mask of 0010 means "only pay attention to the second least
		@@ -102,11 +102,9 @@
		*
		* IFRAME-02: 0001 (we should allow)
		*
		* allow = (0001 & 1010) == 1010
		*
		* allow = (IFRAME-02 & bssid_mask) == (bssid_mask & MAC) ? 1 : 0;
		* --> allow = (0001 & 0010) == (0010 & 0001) ? 1 :0;
		* --> allow = (0010) == (0010)
		* --> allow = (0000) == (0000)
		* --> allow = 1
		*
		* Other examples: