xtensa: ISS: don't use string pointer before NULL check

Move strlen call inside the if block that checks string pointer for NULL.
While at it also fix the following coccicheck warning:

./arch/xtensa/platforms/iss/console.c:204:10-11: WARNING comparing
pointer to 0.

Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>

diff --git a/arch/xtensa/platforms/iss/console.c b/arch/xtensa/platforms/iss/console.c
index 2118448..f6e5fc5 100644 (file)
--- a/arch/xtensa/platforms/iss/console.c
+++ b/arch/xtensa/platforms/iss/console.c
@@ -186,10 +186,10 @@ late_initcall(rs_init);
 
 static void iss_console_write(struct console *co, const char *s, unsigned count)
 {
-       int len = strlen(s);
-
-       if (s != 0 && *s != 0)
+       if (s && *s != 0) {
+               int len = strlen(s);
                simc_write(1, s, count < len ? count : len);
+       }
 }
 
 static struct tty_driver* iss_console_device(struct console *c, int *index)