diff options
| author | Paul Fulghum <paulkf@microgate.com> | 2012-12-03 18:13:24 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-01-16 06:52:23 +0100 |
| commit | a6b68a69fa89daeddc6ca6bb90b6f19a86ed7a9f (patch) | |
| tree | 0570429793adb5fba1a3a1f24ee5d669d92c8daa /drivers/tty/synclinkmp.c | |
| parent | serial: quatech: add the other serial identifiers and preliminary control code (diff) | |
| download | linux-a6b68a69fa89daeddc6ca6bb90b6f19a86ed7a9f.tar.xz linux-a6b68a69fa89daeddc6ca6bb90b6f19a86ed7a9f.zip | |
synclink fix ldisc buffer argument
Fix call to line discipline receive_buf by synclink drivers.
Dummy flag buffer argument is ignored by N_HDLC line discipline but might
be of insufficient size if accessed by a different line discipline
selected by mistake. flag buffer allocation now matches max size of data
buffer. Unused char_buf buffers are removed.
Signed-off-by: Paul Fulghum <paulkf@microgate.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/synclinkmp.c')
| -rw-r--r-- | drivers/tty/synclinkmp.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/tty/synclinkmp.c b/drivers/tty/synclinkmp.c index fd43fb6f7cee..33b7314cc6c7 100644 --- a/drivers/tty/synclinkmp.c +++ b/drivers/tty/synclinkmp.c @@ -262,8 +262,7 @@ typedef struct _synclinkmp_info { bool sca_statctrl_requested; u32 misc_ctrl_value; - char flag_buf[MAX_ASYNC_BUFFER_SIZE]; - char char_buf[MAX_ASYNC_BUFFER_SIZE]; + char *flag_buf; bool drop_rts_on_tx_done; struct _input_signal_events input_signal_events; @@ -3553,6 +3552,13 @@ static int alloc_tmp_rx_buf(SLMP_INFO *info) info->tmp_rx_buf = kmalloc(info->max_frame_size, GFP_KERNEL); if (info->tmp_rx_buf == NULL) return -ENOMEM; + /* unused flag buffer to satisfy receive_buf calling interface */ + info->flag_buf = kzalloc(info->max_frame_size, GFP_KERNEL); + if (!info->flag_buf) { + kfree(info->tmp_rx_buf); + info->tmp_rx_buf = NULL; + return -ENOMEM; + } return 0; } @@ -3560,6 +3566,8 @@ static void free_tmp_rx_buf(SLMP_INFO *info) { kfree(info->tmp_rx_buf); info->tmp_rx_buf = NULL; + kfree(info->flag_buf); + info->flag_buf = NULL; } static int claim_resources(SLMP_INFO *info) |