tty: switch receive_buf() counts to size_t

'size_t' is what receive_buf() expects and returns while handling count.
So switch to 'size_t'.

This renders both local 'count' and 'rcvd' in flush_to_ldisc() to be
size_t too.

Signed-off-by: "Jiri Slaby (SUSE)" <jirislaby@kernel.org>
Link: https://lore.kernel.org/r/20230810091510.13006-12-jirislaby@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/tty_buffer.c b/drivers/tty/tty_buffer.c
index 42464c3..7182dab 100644 (file)
--- a/drivers/tty/tty_buffer.c
+++ b/drivers/tty/tty_buffer.c
@@ -502,12 +502,12 @@ static void lookahead_bufs(struct tty_port *port, struct tty_buffer *head)
        }
 }
 
-static int
-receive_buf(struct tty_port *port, struct tty_buffer *head, int count)
+static size_t
+receive_buf(struct tty_port *port, struct tty_buffer *head, size_t count)
 {
        u8 *p = char_buf_ptr(head, head->read);
        const u8 *f = NULL;
-       int n;
+       size_t n;
 
        if (head->flags)
                f = flag_buf_ptr(head, head->read);
@@ -539,7 +539,7 @@ static void flush_to_ldisc(struct work_struct *work)
        while (1) {
                struct tty_buffer *head = buf->head;
                struct tty_buffer *next;
-               int count, rcvd;
+               size_t count, rcvd;
 
                /* Ldisc or user is trying to gain exclusive access */
                if (atomic_read(&buf->priority))