USB: tty: Add a function to insert a string of characters with the same flag

The USB drivers often want to insert a series of bytes all with the same
flag set - provide a helper for this case.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 6 insertions, 5 deletions

diff --git a/drivers/char/tty_buffer.c b/drivers/char/tty_buffer.c
index 66fa4e10d76b..4c133459ab7e 100644
--- a/drivers/char/tty_buffer.c
+++ b/drivers/char/tty_buffer.c
@@ -231,9 +231,10 @@ int tty_buffer_request_room(struct tty_struct *tty, size_t size)
 EXPORT_SYMBOL_GPL(tty_buffer_request_room);
 
 /**
- *      tty_insert_flip_string  -       Add characters to the tty buffer
+ *      tty_insert_flip_string_fixed_flag - Add characters to the tty buffer
  *      @tty: tty structure
  *      @chars: characters
+ *      @flag: flag value for each character
  *      @size: size
  *
  *      Queue a series of bytes to the tty buffering. All the characters
@@ -242,8 +243,8 @@ EXPORT_SYMBOL_GPL(tty_buffer_request_room);
  *      Locking: Called functions may take tty->buf.lock
  */
 
-int tty_insert_flip_string(struct tty_struct *tty, const unsigned char *chars,
-                                size_t size)
+int tty_insert_flip_string_fixed_flag(struct tty_struct *tty,
+                const unsigned char *chars, char flag, size_t size)
 {
         int copied = 0;
         do {
@@ -253,7 +254,7 @@ int tty_insert_flip_string(struct tty_struct *tty, const unsigned char *chars,
                 if (unlikely(space == 0))
                         break;
                 memcpy(tb->char_buf_ptr + tb->used, chars, space);
-                memset(tb->flag_buf_ptr + tb->used, TTY_NORMAL, space);
+                memset(tb->flag_buf_ptr + tb->used, flag, space);
                 tb->used += space;
                 copied += space;
                 chars += space;
@@ -262,7 +263,7 @@ int tty_insert_flip_string(struct tty_struct *tty, const unsigned char *chars,
         } while (unlikely(size > copied));
         return copied;
 }
-EXPORT_SYMBOL(tty_insert_flip_string);
+EXPORT_SYMBOL(tty_insert_flip_string_fixed_flag);
 
 /**
  *      tty_insert_flip_string_flags    -       Add characters to the tty buffer