diff options
author | Tony Lindgren <tony@atomide.com> | 2019-01-13 17:25:27 -0800 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-01-18 12:57:40 +0100 |
commit | 4feb7a4a1244447a93b4852307a95e1b5d05bde4 (patch) | |
tree | c629515a5cb6e5f582199d15d4d4b200b2d42795 | |
parent | 3384104082467e17317f909486aadb389521f159 (diff) | |
download | linux-4feb7a4a1244447a93b4852307a95e1b5d05bde4.tar.bz2 |
n_gsm: Constify u8 and unsigned char usage
In order to prepare for adding serdev driver support, let's constify
the use of u8 and unsigned char for n_gsm.
Note that gsm_control_modem() gsm_control_rls() read the data for tty
control characters and then call gsm_control_reply() that allocates a
new reply and copies the data.
Cc: linux-serial@vger.kernel.org
Cc: Alan Cox <alan@llwyncelyn.cymru>
Cc: Jiri Slaby <jslaby@suse.cz>
Cc: Johan Hovold <johan@kernel.org>
Cc: Peter Hurley <peter@hurleysoftware.com>
Cc: Rob Herring <robh@kernel.org>
Cc: Sebastian Reichel <sre@kernel.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r-- | drivers/tty/n_gsm.c | 24 |
1 files changed, 12 insertions, 12 deletions
diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c index 6c70640c4ef0..d9662848a297 100644 --- a/drivers/tty/n_gsm.c +++ b/drivers/tty/n_gsm.c @@ -143,8 +143,8 @@ struct gsm_dlci { struct sk_buff *skb; /* Frame being sent */ struct sk_buff_head skb_list; /* Queued frames */ /* Data handling callback */ - void (*data)(struct gsm_dlci *dlci, u8 *data, int len); - void (*prev_data)(struct gsm_dlci *dlci, u8 *data, int len); + void (*data)(struct gsm_dlci *dlci, const u8 *data, int len); + void (*prev_data)(struct gsm_dlci *dlci, const u8 *data, int len); struct net_device *net; /* network interface, if created */ }; @@ -988,7 +988,7 @@ static void gsm_dlci_data_kick(struct gsm_dlci *dlci) * Encode up and queue a UI/UIH frame containing our response. */ -static void gsm_control_reply(struct gsm_mux *gsm, int cmd, u8 *data, +static void gsm_control_reply(struct gsm_mux *gsm, int cmd, const u8 *data, int dlen) { struct gsm_msg *msg; @@ -1073,14 +1073,14 @@ static void gsm_process_modem(struct tty_struct *tty, struct gsm_dlci *dlci, * and if need be stuff a break message down the tty. */ -static void gsm_control_modem(struct gsm_mux *gsm, u8 *data, int clen) +static void gsm_control_modem(struct gsm_mux *gsm, const u8 *data, int clen) { unsigned int addr = 0; unsigned int modem = 0; unsigned int brk = 0; struct gsm_dlci *dlci; int len = clen; - u8 *dp = data; + const u8 *dp = data; struct tty_struct *tty; while (gsm_read_ea(&addr, *dp++) == 0) { @@ -1134,13 +1134,13 @@ static void gsm_control_modem(struct gsm_mux *gsm, u8 *data, int clen) * this into the uplink tty if present */ -static void gsm_control_rls(struct gsm_mux *gsm, u8 *data, int clen) +static void gsm_control_rls(struct gsm_mux *gsm, const u8 *data, int clen) { struct tty_port *port; unsigned int addr = 0; u8 bits; int len = clen; - u8 *dp = data; + const u8 *dp = data; while (gsm_read_ea(&addr, *dp++) == 0) { len--; @@ -1189,7 +1189,7 @@ static void gsm_dlci_begin_close(struct gsm_dlci *dlci); */ static void gsm_control_message(struct gsm_mux *gsm, unsigned int command, - u8 *data, int clen) + const u8 *data, int clen) { u8 buf[1]; unsigned long flags; @@ -1261,7 +1261,7 @@ static void gsm_control_message(struct gsm_mux *gsm, unsigned int command, */ static void gsm_control_response(struct gsm_mux *gsm, unsigned int command, - u8 *data, int clen) + const u8 *data, int clen) { struct gsm_control *ctrl; unsigned long flags; @@ -1553,7 +1553,7 @@ static void gsm_dlci_begin_close(struct gsm_dlci *dlci) * open we shovel the bits down it, if not we drop them. */ -static void gsm_dlci_data(struct gsm_dlci *dlci, u8 *data, int clen) +static void gsm_dlci_data(struct gsm_dlci *dlci, const u8 *data, int clen) { /* krefs .. */ struct tty_port *port = &dlci->port; @@ -1603,7 +1603,7 @@ static void gsm_dlci_data(struct gsm_dlci *dlci, u8 *data, int clen) * and we divide up the work accordingly. */ -static void gsm_dlci_command(struct gsm_dlci *dlci, u8 *data, int len) +static void gsm_dlci_command(struct gsm_dlci *dlci, const u8 *data, int len) { /* See what command is involved */ unsigned int command = 0; @@ -2702,7 +2702,7 @@ static void gsm_mux_net_tx_timeout(struct net_device *net) } static void gsm_mux_rx_netchar(struct gsm_dlci *dlci, - unsigned char *in_buf, int size) + const unsigned char *in_buf, int size) { struct net_device *net = dlci->net; struct sk_buff *skb; |