bnx2x: use prandom_bytes()

Use prandom_bytes() to fill rss key with pseudo-random bytes.
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Eilon Greenstein <eilong@broadcom.com>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Artem Bityutskiy <dedekind1@gmail.com>
Cc: David Laight <david.laight@aculab.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Michel Lespinasse <walken@google.com>
Cc: Robert Love <robert.w.love@intel.com>
Cc: Valdis Kletnieks <valdis.kletnieks@vt.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c

@@ -1832,7 +1832,6 @@ int bnx2x_config_rss_pf(struct bnx2x *bp, struct bnx2x_rss_config_obj *rss_obj,
 			bool config_hash)
 {
 	struct bnx2x_config_rss_params params = {NULL};
-	int i;
 
 	/* Although RSS is meaningless when there is a single HW queue we
 	 * still need it enabled in order to have HW Rx hash generated.
@@ -1864,9 +1863,7 @@ int bnx2x_config_rss_pf(struct bnx2x *bp, struct bnx2x_rss_config_obj *rss_obj,
 
 	if (config_hash) {
 		/* RSS keys */
-		for (i = 0; i < sizeof(params.rss_key) / 4; i++)
-			params.rss_key[i] = random32();
-
+		prandom_bytes(params.rss_key, sizeof(params.rss_key));
 		__set_bit(BNX2X_RSS_SET_SRCH, &params.rss_flags);
 	}