greybus: fix host-device buffer constraints

[cascardo/linux.git] / drivers / staging / greybus / operation.h

diff --git a/drivers/staging/greybus/operation.h b/drivers/staging/greybus/operation.h
index 82b8fe5..3b02db5 100644 (file)
--- a/drivers/staging/greybus/operation.h
+++ b/drivers/staging/greybus/operation.h
@@ -69,6 +69,8 @@ struct gb_operation_msg_hdr {
        __u8    pad[2];         /* must be zero (ignore when read) */
 } __aligned(sizeof(u64));
 
+#define GB_OPERATION_MESSAGE_SIZE_MAX  4096
+
 /*
  * Protocol code should only examine the payload and payload_size
  * fields.  All other fields are intended to be private to the