Commit 2832fc11 authored by Alan Cox's avatar Alan Cox Committed by Greg Kroah-Hartman

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: default avatarAlan Cox <alan@linux.intel.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent e4a3d946
...@@ -231,9 +231,10 @@ int tty_buffer_request_room(struct tty_struct *tty, size_t size) ...@@ -231,9 +231,10 @@ int tty_buffer_request_room(struct tty_struct *tty, size_t size)
EXPORT_SYMBOL_GPL(tty_buffer_request_room); 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 * @tty: tty structure
* @chars: characters * @chars: characters
* @flag: flag value for each character
* @size: size * @size: size
* *
* Queue a series of bytes to the tty buffering. All the characters * Queue a series of bytes to the tty buffering. All the characters
...@@ -242,8 +243,8 @@ EXPORT_SYMBOL_GPL(tty_buffer_request_room); ...@@ -242,8 +243,8 @@ EXPORT_SYMBOL_GPL(tty_buffer_request_room);
* Locking: Called functions may take tty->buf.lock * Locking: Called functions may take tty->buf.lock
*/ */
int tty_insert_flip_string(struct tty_struct *tty, const unsigned char *chars, int tty_insert_flip_string_fixed_flag(struct tty_struct *tty,
size_t size) const unsigned char *chars, char flag, size_t size)
{ {
int copied = 0; int copied = 0;
do { do {
...@@ -253,7 +254,7 @@ int tty_insert_flip_string(struct tty_struct *tty, const unsigned char *chars, ...@@ -253,7 +254,7 @@ int tty_insert_flip_string(struct tty_struct *tty, const unsigned char *chars,
if (unlikely(space == 0)) if (unlikely(space == 0))
break; break;
memcpy(tb->char_buf_ptr + tb->used, chars, space); 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; tb->used += space;
copied += space; copied += space;
chars += space; chars += space;
...@@ -262,7 +263,7 @@ int tty_insert_flip_string(struct tty_struct *tty, const unsigned char *chars, ...@@ -262,7 +263,7 @@ int tty_insert_flip_string(struct tty_struct *tty, const unsigned char *chars,
} while (unlikely(size > copied)); } while (unlikely(size > copied));
return 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 * tty_insert_flip_string_flags - Add characters to the tty buffer
......
...@@ -2,8 +2,8 @@ ...@@ -2,8 +2,8 @@
#define _LINUX_TTY_FLIP_H #define _LINUX_TTY_FLIP_H
extern int tty_buffer_request_room(struct tty_struct *tty, size_t size); extern int tty_buffer_request_room(struct tty_struct *tty, size_t size);
extern int tty_insert_flip_string(struct tty_struct *tty, const unsigned char *chars, size_t size);
extern int tty_insert_flip_string_flags(struct tty_struct *tty, const unsigned char *chars, const char *flags, size_t size); extern int tty_insert_flip_string_flags(struct tty_struct *tty, const unsigned char *chars, const char *flags, size_t size);
extern int tty_insert_flip_string_fixed_flag(struct tty_struct *tty, const unsigned char *chars, char flag, size_t size);
extern int tty_prepare_flip_string(struct tty_struct *tty, unsigned char **chars, size_t size); extern int tty_prepare_flip_string(struct tty_struct *tty, unsigned char **chars, size_t size);
extern int tty_prepare_flip_string_flags(struct tty_struct *tty, unsigned char **chars, char **flags, size_t size); extern int tty_prepare_flip_string_flags(struct tty_struct *tty, unsigned char **chars, char **flags, size_t size);
void tty_schedule_flip(struct tty_struct *tty); void tty_schedule_flip(struct tty_struct *tty);
...@@ -20,4 +20,9 @@ static inline int tty_insert_flip_char(struct tty_struct *tty, ...@@ -20,4 +20,9 @@ static inline int tty_insert_flip_char(struct tty_struct *tty,
return tty_insert_flip_string_flags(tty, &ch, &flag, 1); return tty_insert_flip_string_flags(tty, &ch, &flag, 1);
} }
static inline int tty_insert_flip_string(struct tty_struct *tty, const unsigned char *chars, size_t size)
{
return tty_insert_flip_string_fixed_flag(tty, chars, TTY_NORMAL, size);
}
#endif /* _LINUX_TTY_FLIP_H */ #endif /* _LINUX_TTY_FLIP_H */
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