@@ -1326,7 +1326,6 @@ static ssize_t hso_serial_write(struct tty_struct *tty, const u8 *buf,
size_t count)
{
struct hso_serial *serial = tty->driver_data;
- int space, tx_bytes;
unsigned long flags;
/* sanity check */
@@ -1337,21 +1336,16 @@ static ssize_t hso_serial_write(struct tty_struct *tty, const u8 *buf,
spin_lock_irqsave(&serial->serial_lock, flags);
- space = serial->tx_data_length - serial->tx_buffer_count;
- tx_bytes = (count < space) ? count : space;
+ count = min_t(size_t, serial->tx_data_length - serial->tx_buffer_count,
+ count);
+ memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, count);
+ serial->tx_buffer_count += count;
- if (!tx_bytes)
- goto out;
-
- memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
- serial->tx_buffer_count += tx_bytes;
-
-out:
spin_unlock_irqrestore(&serial->serial_lock, flags);
hso_kick_transmit(serial);
/* done */
- return tx_bytes;
+ return count;
}
/* how much room is there for writing */
There is no need for two more variables in hso_serial_write(). Switch to min_t() and eliminate those. Furthermore, the 'if-goto' is superfluous as memcpy() of zero count is a nop. So is addition of zero. So remove the 'if-goto' completely. Signed-off-by: Jiri Slaby (SUSE) <jirislaby@kernel.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: Eric Dumazet <edumazet@google.com> Cc: Jakub Kicinski <kuba@kernel.org> Cc: Paolo Abeni <pabeni@redhat.com> --- drivers/net/usb/hso.c | 16 +++++----------- 1 file changed, 5 insertions(+), 11 deletions(-)