Input: handlers - rename 'list' to 'client'

The naming convention in input handlers was very confusing -
client stuctures were called lists, regular lists were also
called lists making anyone looking at the code go mad.

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

1 files changed, 122 insertions, 115 deletions

diff --git a/drivers/input/mousedev.c b/drivers/input/mousedev.c
index 007e72f80251..f6a62687d9e4 100644
--- a/drivers/input/mousedev.c
+++ b/drivers/input/mousedev.c
@@ -63,7 +63,7 @@ struct mousedev {
         int minor;
         char name[16];
         wait_queue_head_t wait;
-        struct list_head list;
+        struct list_head client_list;
         struct input_handle handle;
 
         struct mousedev_hw_data packet;
@@ -85,7 +85,7 @@ struct mousedev_motion {
 };
 
 #define PACKET_QUEUE_LEN        16
-struct mousedev_list {
+struct mousedev_client {
         struct fasync_struct *fasync;
         struct mousedev *mousedev;
         struct list_head node;
@@ -223,47 +223,47 @@ static void mousedev_key_event(struct mousedev *mousedev, unsigned int code, int
 
 static void mousedev_notify_readers(struct mousedev *mousedev, struct mousedev_hw_data *packet)
 {
-        struct mousedev_list *list;
+        struct mousedev_client *client;
         struct mousedev_motion *p;
         unsigned long flags;
         int wake_readers = 0;
 
-        list_for_each_entry(list, &mousedev->list, node) {
-                spin_lock_irqsave(&list->packet_lock, flags);
+        list_for_each_entry(client, &mousedev->client_list, node) {
+                spin_lock_irqsave(&client->packet_lock, flags);
 
-                p = &list->packets[list->head];
-                if (list->ready && p->buttons != mousedev->packet.buttons) {
-                        unsigned int new_head = (list->head + 1) % PACKET_QUEUE_LEN;
-                        if (new_head != list->tail) {
-                                p = &list->packets[list->head = new_head];
+                p = &client->packets[client->head];
+                if (client->ready && p->buttons != mousedev->packet.buttons) {
+                        unsigned int new_head = (client->head + 1) % PACKET_QUEUE_LEN;
+                        if (new_head != client->tail) {
+                                p = &client->packets[client->head = new_head];
                                 memset(p, 0, sizeof(struct mousedev_motion));
                         }
                 }
 
                 if (packet->abs_event) {
-                        p->dx += packet->x - list->pos_x;
-                        p->dy += packet->y - list->pos_y;
-                        list->pos_x = packet->x;
-                        list->pos_y = packet->y;
+                        p->dx += packet->x - client->pos_x;
+                        p->dy += packet->y - client->pos_y;
+                        client->pos_x = packet->x;
+                        client->pos_y = packet->y;
                 }
 
-                list->pos_x += packet->dx;
-                list->pos_x = list->pos_x < 0 ? 0 : (list->pos_x >= xres ? xres : list->pos_x);
-                list->pos_y += packet->dy;
-                list->pos_y = list->pos_y < 0 ? 0 : (list->pos_y >= yres ? yres : list->pos_y);
+                client->pos_x += packet->dx;
+                client->pos_x = client->pos_x < 0 ? 0 : (client->pos_x >= xres ? xres : client->pos_x);
+                client->pos_y += packet->dy;
+                client->pos_y = client->pos_y < 0 ? 0 : (client->pos_y >= yres ? yres : client->pos_y);
 
                 p->dx += packet->dx;
                 p->dy += packet->dy;
                 p->dz += packet->dz;
                 p->buttons = mousedev->packet.buttons;
 
-                if (p->dx || p->dy || p->dz || p->buttons != list->last_buttons)
-                        list->ready = 1;
+                if (p->dx || p->dy || p->dz || p->buttons != client->last_buttons)
+                        client->ready = 1;
 
-                spin_unlock_irqrestore(&list->packet_lock, flags);
+                spin_unlock_irqrestore(&client->packet_lock, flags);
 
-                if (list->ready) {
-                        kill_fasync(&list->fasync, SIGIO, POLL_IN);
+                if (client->ready) {
+                        kill_fasync(&client->fasync, SIGIO, POLL_IN);
                         wake_readers = 1;
                 }
         }
@@ -351,9 +351,9 @@ static void mousedev_event(struct input_handle *handle, unsigned int type, unsig
 static int mousedev_fasync(int fd, struct file *file, int on)
 {
         int retval;
-        struct mousedev_list *list = file->private_data;
+        struct mousedev_client *client = file->private_data;
 
-        retval = fasync_helper(fd, file, on, &list->fasync);
+        retval = fasync_helper(fd, file, on, &client->fasync);
 
         return retval < 0 ? retval : 0;
 }
@@ -380,32 +380,33 @@ static void mixdev_release(void)
         }
 }
 
-static int mousedev_release(struct inode * inode, struct file * file)
+static int mousedev_release(struct inode *inode, struct file *file)
 {
-        struct mousedev_list *list = file->private_data;
+        struct mousedev_client *client = file->private_data;
+        struct mousedev *mousedev = client->mousedev;
 
         mousedev_fasync(-1, file, 0);
 
-        list_del(&list->node);
+        list_del(&client->node);
+        kfree(client);
 
-        if (!--list->mousedev->open) {
-                if (list->mousedev->minor == MOUSEDEV_MIX)
+        if (!--mousedev->open) {
+                if (mousedev->minor == MOUSEDEV_MIX)
                         mixdev_release();
                 else if (!mousedev_mix.open) {
-                        if (list->mousedev->exist)
-                                input_close_device(&list->mousedev->handle);
+                        if (mousedev->exist)
+                                input_close_device(&mousedev->handle);
                         else
-                                mousedev_free(list->mousedev);
+                                mousedev_free(mousedev);
                 }
         }
 
-        kfree(list);
         return 0;
 }
 
-static int mousedev_open(struct inode * inode, struct file * file)
+static int mousedev_open(struct inode *inode, struct file *file)
 {
-        struct mousedev_list *list;
+        struct mousedev_client *client;
         struct input_handle *handle;
         struct mousedev *mousedev;
         int i;
@@ -417,31 +418,36 @@ static int mousedev_open(struct inode * inode, struct file * file)
 #endif
                 i = iminor(inode) - MOUSEDEV_MINOR_BASE;
 
-        if (i >= MOUSEDEV_MINORS || !mousedev_table[i])
+        if (i >= MOUSEDEV_MINORS)
+                return -ENODEV;
+
+        mousedev = mousedev_table[i];
+        if (!mousedev)
                 return -ENODEV;
 
-        if (!(list = kzalloc(sizeof(struct mousedev_list), GFP_KERNEL)))
+        client = kzalloc(sizeof(struct mousedev_client), GFP_KERNEL);
+        if (!client)
                 return -ENOMEM;
 
-        spin_lock_init(&list->packet_lock);
-        list->pos_x = xres / 2;
-        list->pos_y = yres / 2;
-        list->mousedev = mousedev_table[i];
-        list_add_tail(&list->node, &mousedev_table[i]->list);
-        file->private_data = list;
+        spin_lock_init(&client->packet_lock);
+        client->pos_x = xres / 2;
+        client->pos_y = yres / 2;
+        client->mousedev = mousedev;
+        list_add_tail(&client->node, &mousedev->client_list);
 
-        if (!list->mousedev->open++) {
-                if (list->mousedev->minor == MOUSEDEV_MIX) {
+        if (!mousedev->open++) {
+                if (mousedev->minor == MOUSEDEV_MIX) {
                         list_for_each_entry(handle, &mousedev_handler.h_list, h_node) {
-                                mousedev = handle->private;
-                                if (!mousedev->open && mousedev->exist)
+                                struct mousedev *md = handle->private;
+                                if (!md->open && md->exist)
                                         input_open_device(handle);
                         }
                 } else
-                        if (!mousedev_mix.open && list->mousedev->exist)
-                                input_open_device(&list->mousedev->handle);
+                        if (!mousedev_mix.open && mousedev->exist)
+                                input_open_device(&mousedev->handle);
         }
 
+        file->private_data = client;
         return 0;
 }
 
@@ -450,13 +456,13 @@ static inline int mousedev_limit_delta(int delta, int limit)
         return delta > limit ? limit : (delta < -limit ? -limit : delta);
 }
 
-static void mousedev_packet(struct mousedev_list *list, signed char *ps2_data)
+static void mousedev_packet(struct mousedev_client *client, signed char *ps2_data)
 {
         struct mousedev_motion *p;
         unsigned long flags;
 
-        spin_lock_irqsave(&list->packet_lock, flags);
-        p = &list->packets[list->tail];
+        spin_lock_irqsave(&client->packet_lock, flags);
+        p = &client->packets[client->tail];
 
         ps2_data[0] = 0x08 | ((p->dx < 0) << 4) | ((p->dy < 0) << 5) | (p->buttons & 0x07);
         ps2_data[1] = mousedev_limit_delta(p->dx, 127);
@@ -464,44 +470,44 @@ static void mousedev_packet(struct mousedev_list *list, signed char *ps2_data)
         p->dx -= ps2_data[1];
         p->dy -= ps2_data[2];
 
-        switch (list->mode) {
+        switch (client->mode) {
                 case MOUSEDEV_EMUL_EXPS:
                         ps2_data[3] = mousedev_limit_delta(p->dz, 7);
                         p->dz -= ps2_data[3];
                         ps2_data[3] = (ps2_data[3] & 0x0f) | ((p->buttons & 0x18) << 1);
-                        list->bufsiz = 4;
+                        client->bufsiz = 4;
                         break;
 
                 case MOUSEDEV_EMUL_IMPS:
                         ps2_data[0] |= ((p->buttons & 0x10) >> 3) | ((p->buttons & 0x08) >> 1);
                         ps2_data[3] = mousedev_limit_delta(p->dz, 127);
                         p->dz -= ps2_data[3];
-                        list->bufsiz = 4;
+                        client->bufsiz = 4;
                         break;
 
                 case MOUSEDEV_EMUL_PS2:
                 default:
                         ps2_data[0] |= ((p->buttons & 0x10) >> 3) | ((p->buttons & 0x08) >> 1);
                         p->dz = 0;
-                        list->bufsiz = 3;
+                        client->bufsiz = 3;
                         break;
         }
 
         if (!p->dx && !p->dy && !p->dz) {
-                if (list->tail == list->head) {
-                        list->ready = 0;
-                        list->last_buttons = p->buttons;
+                if (client->tail == client->head) {
+                        client->ready = 0;
+                        client->last_buttons = p->buttons;
                 } else
-                        list->tail = (list->tail + 1) % PACKET_QUEUE_LEN;
+                        client->tail = (client->tail + 1) % PACKET_QUEUE_LEN;
         }
 
-        spin_unlock_irqrestore(&list->packet_lock, flags);
+        spin_unlock_irqrestore(&client->packet_lock, flags);
 }
 
 
-static ssize_t mousedev_write(struct file * file, const char __user * buffer, size_t count, loff_t *ppos)
+static ssize_t mousedev_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos)
 {
-        struct mousedev_list *list = file->private_data;
+        struct mousedev_client *client = file->private_data;
         unsigned char c;
         unsigned int i;
 
@@ -510,95 +516,95 @@ static ssize_t mousedev_write(struct file * file, const char __user * buffer, si
                 if (get_user(c, buffer + i))
                         return -EFAULT;
 
-                if (c == mousedev_imex_seq[list->imexseq]) {
-                        if (++list->imexseq == MOUSEDEV_SEQ_LEN) {
-                                list->imexseq = 0;
-                                list->mode = MOUSEDEV_EMUL_EXPS;
+                if (c == mousedev_imex_seq[client->imexseq]) {
+                        if (++client->imexseq == MOUSEDEV_SEQ_LEN) {
+                                client->imexseq = 0;
+                                client->mode = MOUSEDEV_EMUL_EXPS;
                         }
                 } else
-                        list->imexseq = 0;
+                        client->imexseq = 0;
 
-                if (c == mousedev_imps_seq[list->impsseq]) {
-                        if (++list->impsseq == MOUSEDEV_SEQ_LEN) {
-                                list->impsseq = 0;
-                                list->mode = MOUSEDEV_EMUL_IMPS;
+                if (c == mousedev_imps_seq[client->impsseq]) {
+                        if (++client->impsseq == MOUSEDEV_SEQ_LEN) {
+                                client->impsseq = 0;
+                                client->mode = MOUSEDEV_EMUL_IMPS;
                         }
                 } else
-                        list->impsseq = 0;
+                        client->impsseq = 0;
 
-                list->ps2[0] = 0xfa;
+                client->ps2[0] = 0xfa;
 
                 switch (c) {
 
                         case 0xeb: /* Poll */
-                                mousedev_packet(list, &list->ps2[1]);
-                                list->bufsiz++; /* account for leading ACK */
+                                mousedev_packet(client, &client->ps2[1]);
+                                client->bufsiz++; /* account for leading ACK */
                                 break;
 
                         case 0xf2: /* Get ID */
-                                switch (list->mode) {
-                                        case MOUSEDEV_EMUL_PS2:  list->ps2[1] = 0; break;
-                                        case MOUSEDEV_EMUL_IMPS: list->ps2[1] = 3; break;
-                                        case MOUSEDEV_EMUL_EXPS: list->ps2[1] = 4; break;
+                                switch (client->mode) {
+                                        case MOUSEDEV_EMUL_PS2:  client->ps2[1] = 0; break;
+                                        case MOUSEDEV_EMUL_IMPS: client->ps2[1] = 3; break;
+                                        case MOUSEDEV_EMUL_EXPS: client->ps2[1] = 4; break;
                                 }
-                                list->bufsiz = 2;
+                                client->bufsiz = 2;
                                 break;
 
                         case 0xe9: /* Get info */
-                                list->ps2[1] = 0x60; list->ps2[2] = 3; list->ps2[3] = 200;
-                                list->bufsiz = 4;
+                                client->ps2[1] = 0x60; client->ps2[2] = 3; client->ps2[3] = 200;
+                                client->bufsiz = 4;
                                 break;
 
                         case 0xff: /* Reset */
-                                list->impsseq = list->imexseq = 0;
-                                list->mode = MOUSEDEV_EMUL_PS2;
-                                list->ps2[1] = 0xaa; list->ps2[2] = 0x00;
-                                list->bufsiz = 3;
+                                client->impsseq = client->imexseq = 0;
+                                client->mode = MOUSEDEV_EMUL_PS2;
+                                client->ps2[1] = 0xaa; client->ps2[2] = 0x00;
+                                client->bufsiz = 3;
                                 break;
 
                         default:
-                                list->bufsiz = 1;
+                                client->bufsiz = 1;
                                 break;
                 }
 
-                list->buffer = list->bufsiz;
+                client->buffer = client->bufsiz;
         }
 
-        kill_fasync(&list->fasync, SIGIO, POLL_IN);
+        kill_fasync(&client->fasync, SIGIO, POLL_IN);
 
-        wake_up_interruptible(&list->mousedev->wait);
+        wake_up_interruptible(&client->mousedev->wait);
 
         return count;
 }
 
-static ssize_t mousedev_read(struct file * file, char __user * buffer, size_t count, loff_t *ppos)
+static ssize_t mousedev_read(struct file *file, char __user *buffer, size_t count, loff_t *ppos)
 {
-        struct mousedev_list *list = file->private_data;
+        struct mousedev_client *client = file->private_data;
         int retval = 0;
 
-        if (!list->ready && !list->buffer && (file->f_flags & O_NONBLOCK))
+        if (!client->ready && !client->buffer && (file->f_flags & O_NONBLOCK))
                 return -EAGAIN;
 
-        retval = wait_event_interruptible(list->mousedev->wait,
-                                          !list->mousedev->exist || list->ready || list->buffer);
+        retval = wait_event_interruptible(client->mousedev->wait,
+                                          !client->mousedev->exist || client->ready || client->buffer);
 
         if (retval)
                 return retval;
 
-        if (!list->mousedev->exist)
+        if (!client->mousedev->exist)
                 return -ENODEV;
 
-        if (!list->buffer && list->ready) {
-                mousedev_packet(list, list->ps2);
-                list->buffer = list->bufsiz;
+        if (!client->buffer && client->ready) {
+                mousedev_packet(client, client->ps2);
+                client->buffer = client->bufsiz;
         }
 
-        if (count > list->buffer)
-                count = list->buffer;
+        if (count > client->buffer)
+                count = client->buffer;
 
-        list->buffer -= count;
+        client->buffer -= count;
 
-        if (copy_to_user(buffer, list->ps2 + list->bufsiz - list->buffer - count, count))
+        if (copy_to_user(buffer, client->ps2 + client->bufsiz - client->buffer - count, count))
                 return -EFAULT;
 
         return count;
@@ -607,11 +613,12 @@ static ssize_t mousedev_read(struct file * file, char __user * buffer, size_t co
 /* No kernel lock - fine */
 static unsigned int mousedev_poll(struct file *file, poll_table *wait)
 {
-        struct mousedev_list *list = file->private_data;
+        struct mousedev_client *client = file->private_data;
+        struct mousedev *mousedev = client->mousedev;
 
-        poll_wait(file, &list->mousedev->wait, wait);
-        return ((list->ready || list->buffer) ? (POLLIN | POLLRDNORM) : 0) |
-                (list->mousedev->exist ? 0 : (POLLHUP | POLLERR));
+        poll_wait(file, &mousedev->wait, wait);
+        return ((client->ready || client->buffer) ? (POLLIN | POLLRDNORM) : 0) |
+                (mousedev->exist ? 0 : (POLLHUP | POLLERR));
 }
 
 static const struct file_operations mousedev_fops = {
@@ -643,7 +650,7 @@ static int mousedev_connect(struct input_handler *handler, struct input_dev *dev
         if (!mousedev)
                 return -ENOMEM;
 
-        INIT_LIST_HEAD(&mousedev->list);
+        INIT_LIST_HEAD(&mousedev->client_list);
         INIT_LIST_HEAD(&mousedev->mixdev_node);
         init_waitqueue_head(&mousedev->wait);
 
@@ -699,7 +706,7 @@ static int mousedev_connect(struct input_handler *handler, struct input_dev *dev
 static void mousedev_disconnect(struct input_handle *handle)
 {
         struct mousedev *mousedev = handle->private;
-        struct mousedev_list *list;
+        struct mousedev_client *client;
 
         input_unregister_handle(handle);
 
@@ -711,8 +718,8 @@ static void mousedev_disconnect(struct input_handle *handle)
         if (mousedev->open) {
                 input_close_device(handle);
                 wake_up_interruptible(&mousedev->wait);
-                list_for_each_entry(list, &mousedev->list, node)
-                        kill_fasync(&list->fasync, SIGIO, POLL_HUP);
+                list_for_each_entry(client, &mousedev->client_list, node)
+                        kill_fasync(&client->fasync, SIGIO, POLL_HUP);
         } else {
                 if (mousedev_mix.open)
                         input_close_device(handle);
@@ -745,7 +752,7 @@ static const struct input_device_id mousedev_ids[] = {
                 .absbit = { BIT(ABS_X) | BIT(ABS_Y) | BIT(ABS_PRESSURE) | BIT(ABS_TOOL_WIDTH) },
         },      /* A touchpad */
 
-        { },    /* Terminating entry */
+        { },    /* Terminating entry */
 };
 
 MODULE_DEVICE_TABLE(input, mousedev_ids);
@@ -777,7 +784,7 @@ static int __init mousedev_init(void)
                 return error;
 
         memset(&mousedev_mix, 0, sizeof(struct mousedev));
-        INIT_LIST_HEAD(&mousedev_mix.list);
+        INIT_LIST_HEAD(&mousedev_mix.client_list);
         init_waitqueue_head(&mousedev_mix.wait);
         mousedev_table[MOUSEDEV_MIX] = &mousedev_mix;
         mousedev_mix.exist = 1;