crypto: 842 - remove WARN inside printk

Remove the WARN() from the beN_to_cpu macro, which is used as a param to a
pr_debug() call.  With a certain kernel config, this printk-in-printk
results in the no_printk() macro trying to recursively call the
no_printk() macro, and since macros can't recursively call themselves
a build error results.
Reported-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Dan Streetman <ddstreet@ieee.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

lib/842/842_decompress.c

@@ -69,7 +69,7 @@ struct sw842_param {
 	((s) == 2 ? be16_to_cpu(get_unaligned((__be16 *)d)) :	\
 	 (s) == 4 ? be32_to_cpu(get_unaligned((__be32 *)d)) :	\
 	 (s) == 8 ? be64_to_cpu(get_unaligned((__be64 *)d)) :	\
-	 WARN(1, "pr_debug param err invalid size %x\n", s))
+	 0)
 
 static int next_bits(struct sw842_param *p, u64 *d, u8 n);
 
@@ -202,10 +202,14 @@ static int __do_index(struct sw842_param *p, u8 size, u8 bits, u64 fsize)
 		return -EINVAL;
 	}
 
-	pr_debug("index%x to %lx off %lx adjoff %lx tot %lx data %lx\n",
-		 size, (unsigned long)index, (unsigned long)(index * size),
-		 (unsigned long)offset, (unsigned long)total,
-		 (unsigned long)beN_to_cpu(&p->ostart[offset], size));
+	if (size != 2 && size != 4 && size != 8)
+		WARN(1, "__do_index invalid size %x\n", size);
+	else
+		pr_debug("index%x to %lx off %lx adjoff %lx tot %lx data %lx\n",
+			 size, (unsigned long)index,
+			 (unsigned long)(index * size), (unsigned long)offset,
+			 (unsigned long)total,
+			 (unsigned long)beN_to_cpu(&p->ostart[offset], size));
 
 	memcpy(p->out, &p->ostart[offset], size);
 	p->out += size;