[PATCH 18/24] media: dvbdev: fix most coding style issues

From: Mauro Carvalho Chehab
Date: Sat May 13 2023 - 13:59:08 EST

As we're doing several changes here, address coding style issues,
as reported by checkpatch.pl.

Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxx>
---
drivers/media/dvb-core/dvbdev.c | 157 +++++++++++++++-----------------
1 file changed, 74 insertions(+), 83 deletions(-)

diff --git a/drivers/media/dvb-core/dvbdev.c b/drivers/media/dvb-core/dvbdev.c
index a4b05e366ccc..fb81fa46d92e 100644
--- a/drivers/media/dvb-core/dvbdev.c
+++ b/drivers/media/dvb-core/dvbdev.c
@@ -61,21 +61,21 @@ static const char * const dnames[] = {
#define DVB_MAX_IDS 4

static const u8 minor_type[] = {
- [DVB_DEVICE_VIDEO] = 0,
- [DVB_DEVICE_AUDIO] = 1,
- [DVB_DEVICE_SEC] = 2,
- [DVB_DEVICE_FRONTEND] = 3,
- [DVB_DEVICE_DEMUX] = 4,
- [DVB_DEVICE_DVR] = 5,
- [DVB_DEVICE_CA] = 6,
- [DVB_DEVICE_NET] = 7,
- [DVB_DEVICE_OSD] = 8,
+ [DVB_DEVICE_VIDEO] = 0,
+ [DVB_DEVICE_AUDIO] = 1,
+ [DVB_DEVICE_SEC] = 2,
+ [DVB_DEVICE_FRONTEND] = 3,
+ [DVB_DEVICE_DEMUX] = 4,
+ [DVB_DEVICE_DVR] = 5,
+ [DVB_DEVICE_CA] = 6,
+ [DVB_DEVICE_NET] = 7,
+ [DVB_DEVICE_OSD] = 8,
};

#define nums2minor(num, type, id) \
- (((num) << 6) | ((id) << 4) | minor_type[type])
+ (((num) << 6) | ((id) << 4) | minor_type[type])

-#define MAX_DVB_MINORS (DVB_MAX_ADAPTERS*64)
+#define MAX_DVB_MINORS (DVB_MAX_ADAPTERS * 64)
#endif

static struct class *dvb_class;
@@ -112,9 +112,7 @@ static int dvb_device_open(struct inode *inode, struct file *file)
return -ENODEV;
}

-
-static const struct file_operations dvb_device_fops =
-{
+static const struct file_operations dvb_device_fops = {
.owner = THIS_MODULE,
.open = dvb_device_open,
.llseek = noop_llseek,
@@ -147,7 +145,6 @@ int dvb_generic_open(struct inode *inode, struct file *file)
}
EXPORT_SYMBOL(dvb_generic_open);

-
int dvb_generic_release(struct inode *inode, struct file *file)
{
struct dvb_device *dvbdev = file->private_data;
@@ -155,11 +152,10 @@ int dvb_generic_release(struct inode *inode, struct file *file)
if (!dvbdev)
return -ENODEV;

- if ((file->f_flags & O_ACCMODE) == O_RDONLY) {
+ if ((file->f_flags & O_ACCMODE) == O_RDONLY)
dvbdev->readers++;
- } else {
+ else
dvbdev->writers++;
- }

dvbdev->users++;

@@ -169,7 +165,6 @@ int dvb_generic_release(struct inode *inode, struct file *file)
}
EXPORT_SYMBOL(dvb_generic_release);

-
long dvb_generic_ioctl(struct file *file,
unsigned int cmd, unsigned long arg)
{
@@ -185,13 +180,13 @@ long dvb_generic_ioctl(struct file *file,
}
EXPORT_SYMBOL(dvb_generic_ioctl);

-
-static int dvbdev_get_free_id (struct dvb_adapter *adap, int type)
+static int dvbdev_get_free_id(struct dvb_adapter *adap, int type)
{
u32 id = 0;

while (id < DVB_MAX_IDS) {
struct dvb_device *dev;
+
list_for_each_entry(dev, &adap->device_list, list_head)
if (dev->type == type && dev->id == id)
goto skip;
@@ -245,7 +240,7 @@ static void dvb_media_device_free(struct dvb_device *dvbdev)

#if defined(CONFIG_MEDIA_CONTROLLER_DVB)
static int dvb_create_tsout_entity(struct dvb_device *dvbdev,
- const char *name, int npads)
+ const char *name, int npads)
{
int i;

@@ -387,7 +382,7 @@ static int dvb_create_media_entity(struct dvb_device *dvbdev,

static int dvb_register_media_device(struct dvb_device *dvbdev,
int type, int minor,
- unsigned demux_sink_pads)
+ unsigned int demux_sink_pads)
{
#if defined(CONFIG_MEDIA_CONTROLLER_DVB)
struct media_link *link;
@@ -462,7 +457,8 @@ int dvb_register_device(struct dvb_adapter *adap, struct dvb_device **pdvbdev,

mutex_lock(&dvbdev_register_lock);

- if ((id = dvbdev_get_free_id (adap, type)) < 0) {
+ id = dvbdev_get_free_id(adap, type);
+ if (id < 0) {
mutex_unlock(&dvbdev_register_lock);
*pdvbdev = NULL;
pr_err("%s: couldn't find free device id\n", __func__);
@@ -470,7 +466,7 @@ int dvb_register_device(struct dvb_adapter *adap, struct dvb_device **pdvbdev,
}

*pdvbdev = dvbdev = kzalloc(sizeof(*dvbdev), GFP_KERNEL);
- if (!dvbdev){
+ if (!dvbdev) {
mutex_unlock(&dvbdev_register_lock);
return -ENOMEM;
}
@@ -482,14 +478,13 @@ int dvb_register_device(struct dvb_adapter *adap, struct dvb_device **pdvbdev,
*/
list_for_each_entry(node, &dvbdevfops_list, list_head) {
if (node->fops->owner == adap->module &&
- node->type == type &&
- node->template == template) {
+ node->type == type && node->template == template) {
dvbdevfops = node->fops;
break;
}
}

- if (dvbdevfops == NULL) {
+ if (!dvbdevfops) {
dvbdevfops = kmemdup(template->fops, sizeof(*dvbdevfops), GFP_KERNEL);
if (!dvbdevfops) {
kfree(dvbdev);
@@ -497,7 +492,7 @@ int dvb_register_device(struct dvb_adapter *adap, struct dvb_device **pdvbdev,
return -ENOMEM;
}

- new_node = kzalloc(sizeof(struct dvbdevfops_node), GFP_KERNEL);
+ new_node = kzalloc(sizeof(*new_node), GFP_KERNEL);
if (!new_node) {
kfree(dvbdevfops);
kfree(dvbdev);
@@ -508,7 +503,7 @@ int dvb_register_device(struct dvb_adapter *adap, struct dvb_device **pdvbdev,
new_node->fops = dvbdevfops;
new_node->type = type;
new_node->template = template;
- list_add_tail (&new_node->list_head, &dvbdevfops_list);
+ list_add_tail(&new_node->list_head, &dvbdevfops_list);
}

memcpy(dvbdev, template, sizeof(struct dvb_device));
@@ -518,21 +513,21 @@ int dvb_register_device(struct dvb_adapter *adap, struct dvb_device **pdvbdev,
dvbdev->adapter = adap;
dvbdev->priv = priv;
dvbdev->fops = dvbdevfops;
- init_waitqueue_head (&dvbdev->wait_queue);
+ init_waitqueue_head(&dvbdev->wait_queue);
dvbdevfops->owner = adap->module;
- list_add_tail (&dvbdev->list_head, &adap->device_list);
+ list_add_tail(&dvbdev->list_head, &adap->device_list);
down_write(&minor_rwsem);
#ifdef CONFIG_DVB_DYNAMIC_MINORS
for (minor = 0; minor < MAX_DVB_MINORS; minor++)
- if (dvb_minors[minor] == NULL)
+ if (!dvb_minors[minor])
break;
if (minor == MAX_DVB_MINORS) {
if (new_node) {
- list_del (&new_node->list_head);
+ list_del(&new_node->list_head);
kfree(dvbdevfops);
kfree(new_node);
}
- list_del (&dvbdev->list_head);
+ list_del(&dvbdev->list_head);
kfree(dvbdev);
up_write(&minor_rwsem);
mutex_unlock(&dvbdev_register_lock);
@@ -547,14 +542,14 @@ int dvb_register_device(struct dvb_adapter *adap, struct dvb_device **pdvbdev,
ret = dvb_register_media_device(dvbdev, type, minor, demux_sink_pads);
if (ret) {
pr_err("%s: dvb_register_media_device failed to create the mediagraph\n",
- __func__);
+ __func__);
if (new_node) {
- list_del (&new_node->list_head);
+ list_del(&new_node->list_head);
kfree(dvbdevfops);
kfree(new_node);
}
dvb_media_device_free(dvbdev);
- list_del (&dvbdev->list_head);
+ list_del(&dvbdev->list_head);
kfree(dvbdev);
mutex_unlock(&dvbdev_register_lock);
return ret;
@@ -567,12 +562,12 @@ int dvb_register_device(struct dvb_adapter *adap, struct dvb_device **pdvbdev,
pr_err("%s: failed to create device dvb%d.%s%d (%ld)\n",
__func__, adap->num, dnames[type], id, PTR_ERR(clsdev));
if (new_node) {
- list_del (&new_node->list_head);
+ list_del(&new_node->list_head);
kfree(dvbdevfops);
kfree(new_node);
}
dvb_media_device_free(dvbdev);
- list_del (&dvbdev->list_head);
+ list_del(&dvbdev->list_head);
kfree(dvbdev);
mutex_unlock(&dvbdev_register_lock);
return PTR_ERR(clsdev);
@@ -586,7 +581,6 @@ int dvb_register_device(struct dvb_adapter *adap, struct dvb_device **pdvbdev,
}
EXPORT_SYMBOL(dvb_register_device);

-
void dvb_remove_device(struct dvb_device *dvbdev)
{
if (!dvbdev)
@@ -601,19 +595,17 @@ void dvb_remove_device(struct dvb_device *dvbdev)

device_destroy(dvb_class, MKDEV(DVB_MAJOR, dvbdev->minor));

- list_del (&dvbdev->list_head);
+ list_del(&dvbdev->list_head);
}
EXPORT_SYMBOL(dvb_remove_device);

-
static void dvb_free_device(struct kref *ref)
{
struct dvb_device *dvbdev = container_of(ref, struct dvb_device, ref);

- kfree (dvbdev);
+ kfree(dvbdev);
}

-
struct dvb_device *dvb_device_get(struct dvb_device *dvbdev)
{
kref_get(&dvbdev->ref);
@@ -621,14 +613,12 @@ struct dvb_device *dvb_device_get(struct dvb_device *dvbdev)
}
EXPORT_SYMBOL(dvb_device_get);

-
void dvb_device_put(struct dvb_device *dvbdev)
{
if (dvbdev)
kref_put(&dvbdev->ref, dvb_free_device);
}

-
void dvb_unregister_device(struct dvb_device *dvbdev)
{
dvb_remove_device(dvbdev);
@@ -636,7 +626,6 @@ void dvb_unregister_device(struct dvb_device *dvbdev)
}
EXPORT_SYMBOL(dvb_unregister_device);

-
#ifdef CONFIG_MEDIA_CONTROLLER_DVB

static int dvb_create_io_intf_links(struct dvb_adapter *adap,
@@ -669,9 +658,9 @@ int dvb_create_media_graph(struct dvb_adapter *adap,
struct media_entity *demux = NULL, *ca = NULL;
struct media_link *link;
struct media_interface *intf;
- unsigned demux_pad = 0;
- unsigned dvr_pad = 0;
- unsigned ntuner = 0, ndemod = 0;
+ unsigned int demux_pad = 0;
+ unsigned int dvr_pad = 0;
+ unsigned int ntuner = 0, ndemod = 0;
int ret, pad_source, pad_sink;
static const char *connector_name = "Television";

@@ -795,18 +784,18 @@ int dvb_create_media_graph(struct dvb_adapter *adap,
media_device_for_each_entity(entity, mdev) {
if (entity->function == MEDIA_ENT_F_IO_DTV) {
if (!strncmp(entity->name, DVR_TSOUT,
- strlen(DVR_TSOUT))) {
+ strlen(DVR_TSOUT))) {
ret = media_create_pad_link(demux,
- ++dvr_pad,
- entity, 0, 0);
+ ++dvr_pad,
+ entity, 0, 0);
if (ret)
return ret;
}
if (!strncmp(entity->name, DEMUX_TSOUT,
- strlen(DEMUX_TSOUT))) {
+ strlen(DEMUX_TSOUT))) {
ret = media_create_pad_link(demux,
- ++demux_pad,
- entity, 0, 0);
+ ++demux_pad,
+ entity, 0, 0);
if (ret)
return ret;
}
@@ -864,8 +853,10 @@ EXPORT_SYMBOL_GPL(dvb_create_media_graph);
static int dvbdev_check_free_adapter_num(int num)
{
struct list_head *entry;
+
list_for_each(entry, &dvb_adapter_list) {
struct dvb_adapter *adap;
+
adap = list_entry(entry, struct dvb_adapter, list_head);
if (adap->num == num)
return 0;
@@ -873,7 +864,7 @@ static int dvbdev_check_free_adapter_num(int num)
return 1;
}

-static int dvbdev_get_free_adapter_num (void)
+static int dvbdev_get_free_adapter_num(void)
{
int num = 0;

@@ -886,7 +877,6 @@ static int dvbdev_get_free_adapter_num (void)
return -ENFILE;
}

-
int dvb_register_adapter(struct dvb_adapter *adap, const char *name,
struct module *module, struct device *device,
short *adapter_nums)
@@ -913,8 +903,8 @@ int dvb_register_adapter(struct dvb_adapter *adap, const char *name,
return -ENFILE;
}

- memset (adap, 0, sizeof(struct dvb_adapter));
- INIT_LIST_HEAD (&adap->device_list);
+ memset(adap, 0, sizeof(struct dvb_adapter));
+ INIT_LIST_HEAD(&adap->device_list);

pr_info("DVB: registering new adapter (%s)\n", name);

@@ -924,13 +914,13 @@ int dvb_register_adapter(struct dvb_adapter *adap, const char *name,
adap->device = device;
adap->mfe_shared = 0;
adap->mfe_dvbdev = NULL;
- mutex_init (&adap->mfe_lock);
+ mutex_init(&adap->mfe_lock);

#ifdef CONFIG_MEDIA_CONTROLLER_DVB
mutex_init(&adap->mdev_lock);
#endif

- list_add_tail (&adap->list_head, &dvb_adapter_list);
+ list_add_tail(&adap->list_head, &dvb_adapter_list);

mutex_unlock(&dvbdev_register_lock);

@@ -938,25 +928,26 @@ int dvb_register_adapter(struct dvb_adapter *adap, const char *name,
}
EXPORT_SYMBOL(dvb_register_adapter);

-
int dvb_unregister_adapter(struct dvb_adapter *adap)
{
mutex_lock(&dvbdev_register_lock);
- list_del (&adap->list_head);
+ list_del(&adap->list_head);
mutex_unlock(&dvbdev_register_lock);
return 0;
}
EXPORT_SYMBOL(dvb_unregister_adapter);

-/* if the miracle happens and "generic_usercopy()" is included into
- the kernel, then this can vanish. please don't make the mistake and
- define this as video_usercopy(). this will introduce a dependency
- to the v4l "videodev.o" module, which is unnecessary for some
- cards (ie. the budget dvb-cards don't need the v4l module...) */
+/*
+ * if the miracle happens and "generic_usercopy()" is included into
+ * the kernel, then this can vanish. please don't make the mistake and
+ * define this as video_usercopy(). this will introduce a dependency
+ * to the v4l "videodev.o" module, which is unnecessary for some
+ * cards (ie. the budget dvb-cards don't need the v4l module...)
+ */
int dvb_usercopy(struct file *file,
- unsigned int cmd, unsigned long arg,
- int (*func)(struct file *file,
- unsigned int cmd, void *arg))
+ unsigned int cmd, unsigned long arg,
+ int (*func)(struct file *file,
+ unsigned int cmd, void *arg))
{
char sbuf[128];
void *mbuf = NULL;
@@ -970,7 +961,7 @@ int dvb_usercopy(struct file *file,
* For this command, the pointer is actually an integer
* argument.
*/
- parg = (void *) arg;
+ parg = (void *)arg;
break;
case _IOC_READ: /* some v4l ioctls are marked wrong ... */
case _IOC_WRITE:
@@ -980,7 +971,7 @@ int dvb_usercopy(struct file *file,
} else {
/* too big to allocate from stack */
mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
- if (NULL == mbuf)
+ if (!mbuf)
return -ENOMEM;
parg = mbuf;
}
@@ -992,15 +983,15 @@ int dvb_usercopy(struct file *file,
}

/* call driver */
- if ((err = func(file, cmd, parg)) == -ENOIOCTLCMD)
+ err = func(file, cmd, parg);
+ if (err == -ENOIOCTLCMD)
err = -ENOTTY;

if (err < 0)
goto out;

/* Copy results into user buffer */
- switch (_IOC_DIR(cmd))
- {
+ switch (_IOC_DIR(cmd)) {
case _IOC_READ:
case (_IOC_WRITE | _IOC_READ):
if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
@@ -1080,19 +1071,20 @@ static char *dvb_devnode(const struct device *dev, umode_t *mode)
dvbdev->adapter->num, dnames[dvbdev->type], dvbdev->id);
}

-
static int __init init_dvbdev(void)
{
int retval;
dev_t dev = MKDEV(DVB_MAJOR, 0);

- if ((retval = register_chrdev_region(dev, MAX_DVB_MINORS, "DVB")) != 0) {
+ retval = register_chrdev_region(dev, MAX_DVB_MINORS, "DVB");
+ if (retval != 0) {
pr_err("dvb-core: unable to get major %d\n", DVB_MAJOR);
return retval;
}

cdev_init(&dvb_device_cdev, &dvb_device_fops);
- if ((retval = cdev_add(&dvb_device_cdev, dev, MAX_DVB_MINORS)) != 0) {
+ retval = cdev_add(&dvb_device_cdev, dev, MAX_DVB_MINORS);
+ if (retval != 0) {
pr_err("dvb-core: unable register character device\n");
goto error;
}
@@ -1112,7 +1104,6 @@ static int __init init_dvbdev(void)
return retval;
}

-
static void __exit exit_dvbdev(void)
{
struct dvbdevfops_node *node, *next;
@@ -1122,7 +1113,7 @@ static void __exit exit_dvbdev(void)
unregister_chrdev_region(MKDEV(DVB_MAJOR, 0), MAX_DVB_MINORS);

list_for_each_entry_safe(node, next, &dvbdevfops_list, list_head) {
- list_del (&node->list_head);
+ list_del(&node->list_head);
kfree(node->fops);
kfree(node);
}
--
2.40.1