diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/char/cyclades.c | 34 |
1 files changed, 16 insertions, 18 deletions
diff --git a/drivers/char/cyclades.c b/drivers/char/cyclades.c index c236e9f7d8e7..91609539ad8a 100644 --- a/drivers/char/cyclades.c +++ b/drivers/char/cyclades.c @@ -1560,7 +1560,7 @@ cyz_handle_rx(struct cyclades_port *info, struct CH_CTRL __iomem *ch_ctrl, int char_count; int len; #ifdef BLOCKMOVE - int small_count; + unsigned char *buf; #else char data; #endif @@ -1596,25 +1596,23 @@ cyz_handle_rx(struct cyclades_port *info, struct CH_CTRL __iomem *ch_ctrl, /* we'd like to use memcpy(t, f, n) and memset(s, c, count) for performance, but because of buffer boundaries, there may be several steps to the operation */ - while (0 < (small_count = min_t(unsigned int, - rx_bufsize - new_rx_get, - min_t(unsigned int, TTY_FLIPBUF_SIZE - - tty->flip.count, char_count)))){ - memcpy_fromio(tty->flip.char_buf_ptr, - (char *)(cinfo->base_addr + rx_bufaddr + - new_rx_get), - small_count); + while (1) { + len = tty_prepare_flip_string(tty, &buf, + char_count); + if (!len) + break; - tty->flip.char_buf_ptr += small_count; - memset(tty->flip.flag_buf_ptr, TTY_NORMAL, - small_count); - tty->flip.flag_buf_ptr += small_count; - new_rx_get = (new_rx_get + small_count) & + len = min_t(unsigned int, min(len, char_count), + rx_bufsize - new_rx_get); + + memcpy_fromio(buf, cinfo->base_addr + + rx_bufaddr + new_rx_get, len); + + new_rx_get = (new_rx_get + len) & (rx_bufsize - 1); - char_count -= small_count; - info->icount.rx += small_count; - info->idle_stats.recv_bytes += small_count; - tty->flip.count += small_count; + char_count -= len; + info->icount.rx += len; + info->idle_stats.recv_bytes += len; } #else len = tty_buffer_request_room(tty, char_count); |