diff options
| author | Jiri Slaby (SUSE) <jirislaby@kernel.org> | 2023-04-20 11:35:30 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-04-20 13:32:53 +0200 |
| commit | ee13ea33e066507a374a0d091034f1150e9d0c07 (patch) | |
| tree | bd163cf1c88daef404c6dcdb3bc0bd7b3f06ff19 /drivers/tty | |
| parent | 5c7e105cd156fc9adf5294a83623d7a40c15f9b9 (diff) | |
| download | linux-ee13ea33e066507a374a0d091034f1150e9d0c07.tar.gz | |
tty: synclink_gt: don't allocate and pass dummy flags
In synclinc_gt, the flag_buf is allocated, zeroed and passed to ldisc's
receive_buf(). It is never written to, so it serves as a dummy buffer.
That's unneeded because all ldiscs accept NULL as flags. That NULL
resolves to the TTY_NORMAL flag.
So drop all this nonsense.
Signed-off-by: Jiri Slaby (SUSE) <jirislaby@kernel.org>
Link: https://lore.kernel.org/r/20230420093530.13133-1-jirislaby@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/synclink_gt.c | 18 |
1 files changed, 5 insertions, 13 deletions
diff --git a/drivers/tty/synclink_gt.c b/drivers/tty/synclink_gt.c index 543b3224dce9..16e469e581ec 100644 --- a/drivers/tty/synclink_gt.c +++ b/drivers/tty/synclink_gt.c @@ -287,7 +287,6 @@ struct slgt_info { unsigned char *tx_buf; int tx_count; - char *flag_buf; bool drop_rts_on_tx_done; struct _input_signal_events input_signal_events; @@ -3244,13 +3243,7 @@ static int alloc_tmp_rbuf(struct slgt_info *info) info->tmp_rbuf = kmalloc(info->max_frame_size + 5, GFP_KERNEL); if (info->tmp_rbuf == NULL) return -ENOMEM; - /* unused flag buffer to satisfy receive_buf calling interface */ - info->flag_buf = kzalloc(info->max_frame_size + 5, GFP_KERNEL); - if (!info->flag_buf) { - kfree(info->tmp_rbuf); - info->tmp_rbuf = NULL; - return -ENOMEM; - } + return 0; } @@ -3258,8 +3251,6 @@ static void free_tmp_rbuf(struct slgt_info *info) { kfree(info->tmp_rbuf); info->tmp_rbuf = NULL; - kfree(info->flag_buf); - info->flag_buf = NULL; } /* @@ -4657,7 +4648,8 @@ check_again: hdlcdev_rx(info,info->tmp_rbuf, framesize); else #endif - ldisc_receive_buf(tty, info->tmp_rbuf, info->flag_buf, framesize); + ldisc_receive_buf(tty, info->tmp_rbuf, NULL, + framesize); } } free_rbufs(info, start, end); @@ -4691,8 +4683,8 @@ static bool rx_get_buf(struct slgt_info *info) DBGDATA(info, info->rbufs[i].buf, count, "rx"); DBGINFO(("rx_get_buf size=%d\n", count)); if (count) - ldisc_receive_buf(info->port.tty, info->rbufs[i].buf, - info->flag_buf, count); + ldisc_receive_buf(info->port.tty, info->rbufs[i].buf, NULL, + count); free_rbufs(info, i, i); return true; } |