[PATCH] char: misc: minor code cleanup

From: Martin Kaiser
Date: Mon Feb 27 2017 - 23:38:05 EST


Fix a couple of minor issues found by checkpatch.pl:

Add/remove spaces where required.
Move EXPORT_SYMBOL() to the end of the function it refers to.
Set the access mode for the proc entry explicity.
Use pr_warn() instead of printk() without loglevel.

Signed-off-by: Martin Kaiser <martin@xxxxxxxxx>
---
drivers/char/misc.c | 16 ++++++++--------
1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/drivers/char/misc.c b/drivers/char/misc.c
index 8069b36..c2a2048 100644
--- a/drivers/char/misc.c
+++ b/drivers/char/misc.c
@@ -109,7 +109,7 @@ static int misc_seq_open(struct inode *inode, struct file *file)
};
#endif

-static int misc_open(struct inode * inode, struct file * file)
+static int misc_open(struct inode *inode, struct file *file)
{
int minor = iminor(inode);
struct miscdevice *c;
@@ -150,7 +150,7 @@ static int misc_open(struct inode * inode, struct file * file)
err = 0;
replace_fops(file, new_fops);
if (file->f_op->open)
- err = file->f_op->open(inode,file);
+ err = file->f_op->open(inode, file);
fail:
mutex_unlock(&misc_mtx);
return err;
@@ -182,7 +182,7 @@ static int misc_open(struct inode * inode, struct file * file)
* failure.
*/

-int misc_register(struct miscdevice * misc)
+int misc_register(struct miscdevice *misc)
{
dev_t dev;
int err = 0;
@@ -194,6 +194,7 @@ int misc_register(struct miscdevice * misc)

if (is_dynamic) {
int i = find_first_zero_bit(misc_minors, DYNAMIC_MINORS);
+
if (i >= DYNAMIC_MINORS) {
err = -EBUSY;
goto out;
@@ -237,6 +238,7 @@ int misc_register(struct miscdevice * misc)
mutex_unlock(&misc_mtx);
return err;
}
+EXPORT_SYMBOL(misc_register);

/**
* misc_deregister - unregister a miscellaneous device
@@ -260,8 +262,6 @@ void misc_deregister(struct miscdevice *misc)
clear_bit(i, misc_minors);
mutex_unlock(&misc_mtx);
}
-
-EXPORT_SYMBOL(misc_register);
EXPORT_SYMBOL(misc_deregister);

static char *misc_devnode(struct device *dev, umode_t *mode)
@@ -280,20 +280,20 @@ static int __init misc_init(void)
int err;
struct proc_dir_entry *ret;

- ret = proc_create("misc", 0, NULL, &misc_proc_fops);
+ ret = proc_create("misc", 0444, NULL, &misc_proc_fops);
misc_class = class_create(THIS_MODULE, "misc");
err = PTR_ERR(misc_class);
if (IS_ERR(misc_class))
goto fail_remove;

err = -EIO;
- if (register_chrdev(MISC_MAJOR,"misc",&misc_fops))
+ if (register_chrdev(MISC_MAJOR, "misc", &misc_fops))
goto fail_printk;
misc_class->devnode = misc_devnode;
return 0;

fail_printk:
- printk("unable to get major %d for misc devices\n", MISC_MAJOR);
+ pr_warn("unable to get major %d for misc devices\n", MISC_MAJOR);
class_destroy(misc_class);
fail_remove:
if (ret)
--
1.7.10.4