USB: g_mass_storage: constant length buffers used

[platform/adaptation/renesas_rcar/renesas_kernel.git] / drivers / usb / gadget / storage_common.c

diff --git a/drivers/usb/gadget/storage_common.c b/drivers/usb/gadget/storage_common.c
index e76c8ce..60bc696 100644 (file)
--- a/drivers/usb/gadget/storage_common.c
+++ b/drivers/usb/gadget/storage_common.c
@@ -47,6 +47,12 @@
  * When FSG_NO_OTG is defined fsg_otg_desc won't be defined.
  */
 
+/*
+ * When FSG_BUFFHD_STATIC_BUFFER is defined when this file is included
+ * the fsg_buffhd structure's buf field will be an array of FSG_BUFLEN
+ * characters rather then a pointer to void.
+ */
+
 
 #include <asm/unaligned.h>
 
@@ -290,7 +296,11 @@ enum fsg_buffer_state {
 };
 
 struct fsg_buffhd {
+#ifdef FSG_BUFFHD_STATIC_BUFFER
+       char                            buf[FSG_BUFLEN];
+#else
        void                            *buf;
+#endif
        enum fsg_buffer_state           state;
        struct fsg_buffhd               *next;