ipwireless: Constify buffer variables

ipwireless: Constify buffer variables

Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

3 files changed, 16 insertions, 14 deletions

diff --git a/drivers/char/pcmcia/ipwireless/hardware.c b/drivers/char/pcmcia/ipwireless/hardware.c
index ff2093d22109..814ea3228ca2 100644
--- a/drivers/char/pcmcia/ipwireless/hardware.c
+++ b/drivers/char/pcmcia/ipwireless/hardware.c
@@ -30,11 +30,11 @@
 static void ipw_send_setup_packet(struct ipw_hardware *hw);
 static void handle_received_SETUP_packet(struct ipw_hardware *ipw,
                                          unsigned int address,
-                                         unsigned char *data, int len,
+                                         const unsigned char *data, int len,
                                          int is_last);
 static void ipwireless_setup_timer(unsigned long data);
 static void handle_received_CTRL_packet(struct ipw_hardware *hw,
-                unsigned int channel_idx, unsigned char *data, int len);
+                unsigned int channel_idx, const unsigned char *data, int len);
 
 /*#define TIMING_DIAGNOSTICS*/
 
@@ -615,8 +615,10 @@ static void pool_free(struct ipw_hardware *hw, struct ipw_rx_packet *packet)
 }
 
 static void queue_received_packet(struct ipw_hardware *hw,
-                                  unsigned int protocol, unsigned int address,
-                                  unsigned char *data, int length, int is_last)
+                                  unsigned int protocol,
+                                  unsigned int address,
+                                  const unsigned char *data, int length,
+                                  int is_last)
 {
         unsigned int channel_idx = address - 1;
         struct ipw_rx_packet *packet = NULL;
@@ -760,10 +762,10 @@ static void ipw_receive_data_work(struct work_struct *work_rx)
 
 static void handle_received_CTRL_packet(struct ipw_hardware *hw,
                                         unsigned int channel_idx,
-                                        unsigned char *data, int len)
+                                        const unsigned char *data, int len)
 {
-        struct ipw_control_packet_body *body =
-                (struct ipw_control_packet_body *) data;
+        const struct ipw_control_packet_body *body =
+                (const struct ipw_control_packet_body *) data;
         unsigned int changed_mask;
 
         if (len != sizeof(struct ipw_control_packet_body)) {
@@ -805,13 +807,13 @@ static void handle_received_CTRL_packet(struct ipw_hardware *hw,
 }
 
 static void handle_received_packet(struct ipw_hardware *hw,
-                                   union nl_packet *packet,
+                                   const union nl_packet *packet,
                                    unsigned short len)
 {
         unsigned int protocol = packet->hdr.protocol;
         unsigned int address = packet->hdr.address;
         unsigned int header_length;
-        unsigned char *data;
+        const unsigned char *data;
         unsigned int data_len;
         int is_last = packet->hdr.packet_rank & NL_LAST_PACKET;
 
@@ -1288,7 +1290,7 @@ static void *alloc_ctrl_packet(int header_size,
 }
 
 int ipwireless_send_packet(struct ipw_hardware *hw, unsigned int channel_idx,
-                            unsigned char *data, unsigned int length,
+                            const unsigned char *data, unsigned int length,
                             void (*callback) (void *cb, unsigned int length),
                             void *callback_data)
 {
@@ -1522,10 +1524,10 @@ static void ipw_send_setup_packet(struct ipw_hardware *hw)
 
 static void handle_received_SETUP_packet(struct ipw_hardware *hw,
                                          unsigned int address,
-                                         unsigned char *data, int len,
+                                         const unsigned char *data, int len,
                                          int is_last)
 {
-        union ipw_setup_rx_msg *rx_msg = (union ipw_setup_rx_msg *) data;
+        const union ipw_setup_rx_msg *rx_msg = (const union ipw_setup_rx_msg *) data;
 
         if (address != ADDR_SETUP_PROT) {
                 printk(KERN_INFO IPWIRELESS_PCCARD_NAME
diff --git a/drivers/char/pcmcia/ipwireless/hardware.h b/drivers/char/pcmcia/ipwireless/hardware.h
index e21d23a922ac..90a8590e43b0 100644
--- a/drivers/char/pcmcia/ipwireless/hardware.h
+++ b/drivers/char/pcmcia/ipwireless/hardware.h
@@ -41,7 +41,7 @@ int ipwireless_set_RTS(struct ipw_hardware *hw, unsigned int channel_idx,
                 int state);
 int ipwireless_send_packet(struct ipw_hardware *hw,
                             unsigned int channel_idx,
-                            unsigned char *data,
+                            const unsigned char *data,
                             unsigned int length,
                             void (*packet_sent_callback) (void *cb,
                                                           unsigned int length),
diff --git a/drivers/char/pcmcia/ipwireless/tty.c b/drivers/char/pcmcia/ipwireless/tty.c
index 42f3815c5ce3..b1414507997c 100644
--- a/drivers/char/pcmcia/ipwireless/tty.c
+++ b/drivers/char/pcmcia/ipwireless/tty.c
@@ -259,7 +259,7 @@ static int ipw_write(struct tty_struct *linux_tty,
         }
 
         ret = ipwireless_send_packet(tty->hardware, IPW_CHANNEL_RAS,
-                               (unsigned char *) buf, count,
+                               buf, count,
                                ipw_write_packet_sent_callback, tty);
         if (ret == -1) {
                 mutex_unlock(&tty->ipw_tty_mutex);