[PATCH v2] dio: Fix buffer overflow in case of unknown board

[Geert Uytterhoeven]

With gcc 8.2.0:

    drivers/dio/dio.c: In function âdio_initâ:
    drivers/dio/dio.c:240:17: warning: âstrcpyâ writing 69 or more bytes into a region of size 64 overflows the destination [-Wstringop-overflow=]
		     strcpy(dev->name,dio_getname(dev->id));
		     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Indeed, if an unknown board is present, the target buffer will overflow.
Shorten the unknown board name string to fix this, and declare it as an
array while at it.

Signed-off-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
---
v2:
  - Declare unknowndioname as an array.
---
 drivers/dio/dio.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/dio/dio.c b/drivers/dio/dio.c
index 92e78d16b476550c..c9aa15fb86a9aed0 100644
--- a/drivers/dio/dio.c
+++ b/drivers/dio/dio.c
@@ -89,8 +89,8 @@ static struct dioname names[] =
 #undef DIONAME
 #undef DIOFBNAME
 
-static const char *unknowndioname 
-        = "unknown DIO board -- please email <linux-m68k@xxxxxxxxxxxxxxxxxxxx>!";
+static const char unknowndioname[]
+	= "unknown DIO board, please email linux-m68k@xxxxxxxxxxxxxxxxxxxx";
 
 static const char *dio_getname(int id)
 {
-- 
2.17.1