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>
diff --git a/drivers/char/tty_buffer.c b/drivers/char/tty_buffer.c
index 66fa4e1..4c13345 100644
--- a/drivers/char/tty_buffer.c
+++ b/drivers/char/tty_buffer.c
@@ -231,9 +231,10 @@
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 @@
* 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 @@
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 @@
} 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