[PATCH][next] can: etas_es58x: Replace zero-length array with DECLARE_FLEX_ARRAY() helper

[Gustavo A. R. Silva]

Zero-length arrays are deprecated and we are moving towards adopting
C99 flexible-array members, instead. So, replace zero-length array
declaration in union es58x_urb_cmd with the new DECLARE_FLEX_ARRAY()
helper macro.

This helper allows for a flexible-array member in a union.

Link: https://github.com/KSPP/linux/issues/193
Link: https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html
Signed-off-by: Gustavo A. R. Silva <gustavoars@xxxxxxxxxx>
---
 drivers/net/can/usb/etas_es58x/es58x_core.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/can/usb/etas_es58x/es58x_core.h b/drivers/net/can/usb/etas_es58x/es58x_core.h
index d769bdf740b7..640fe0a1df63 100644
--- a/drivers/net/can/usb/etas_es58x/es58x_core.h
+++ b/drivers/net/can/usb/etas_es58x/es58x_core.h
@@ -222,7 +222,7 @@ union es58x_urb_cmd {
 		u8 cmd_type;
 		u8 cmd_id;
 	} __packed;
-	u8 raw_cmd[0];
+	DECLARE_FLEX_ARRAY(u8, raw_cmd);
 };
 
 /**
-- 
2.34.1