x86: kdebugfs.c cleanup

Impact: cleanup

Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>

diff --git a/arch/x86/kernel/kdebugfs.c b/arch/x86/kernel/kdebugfs.c
index ff7d3b0124f1db07bbb0750ec0fe0e9237f66574..e444357375ce1421e137d6731adc3edba30def28 100644 (file)
--- a/arch/x86/kernel/kdebugfs.c
+++ b/arch/x86/kernel/kdebugfs.c
@@ -8,11 +8,11 @@
  */
 #include <linux/debugfs.h>
 #include <linux/uaccess.h>
-#include <linux/stat.h>
+#include <linux/module.h>
 #include <linux/init.h>
+#include <linux/stat.h>
 #include <linux/io.h>
 #include <linux/mm.h>
-#include <linux/module.h>
 
 #include <asm/setup.h>
 
@@ -26,9 +26,8 @@ struct setup_data_node {
        u32 len;
 };
 
-static ssize_t
-setup_data_read(struct file *file, char __user *user_buf, size_t count,
-               loff_t *ppos)
+static ssize_t setup_data_read(struct file *file, char __user *user_buf,
+                              size_t count, loff_t *ppos)
 {
        struct setup_data_node *node = file->private_data;
        unsigned long remain;
@@ -39,20 +38,21 @@ setup_data_read(struct file *file, char __user *user_buf, size_t count,
 
        if (pos < 0)
                return -EINVAL;
+
        if (pos >= node->len)
                return 0;
 
        if (count > node->len - pos)
                count = node->len - pos;
+
        pa = node->paddr + sizeof(struct setup_data) + pos;
        pg = pfn_to_page((pa + count - 1) >> PAGE_SHIFT);
        if (PageHighMem(pg)) {
                p = ioremap_cache(pa, count);
                if (!p)
                        return -ENXIO;
-       } else {
+       } else
                p = __va(pa);
-       }
 
        remain = copy_to_user(user_buf, p, count);
 
@@ -70,12 +70,13 @@ setup_data_read(struct file *file, char __user *user_buf, size_t count,
 static int setup_data_open(struct inode *inode, struct file *file)
 {
        file->private_data = inode->i_private;
+
        return 0;
 }
 
 static const struct file_operations fops_setup_data = {
-       .read =         setup_data_read,
-       .open =         setup_data_open,
+       .read           = setup_data_read,
+       .open           = setup_data_open,
 };
 
 static int __init
@@ -84,57 +85,50 @@ create_setup_data_node(struct dentry *parent, int no,
 {
        struct dentry *d, *type, *data;
        char buf[16];
-       int error;
 
        sprintf(buf, "%d", no);
        d = debugfs_create_dir(buf, parent);
-       if (!d) {
-               error = -ENOMEM;
-               goto err_return;
-       }
+       if (!d)
+               return -ENOMEM;
+
        type = debugfs_create_x32("type", S_IRUGO, d, &node->type);
-       if (!type) {
-               error = -ENOMEM;
+       if (!type)
                goto err_dir;
-       }
+
        data = debugfs_create_file("data", S_IRUGO, d, node, &fops_setup_data);
-       if (!data) {
-               error = -ENOMEM;
+       if (!data)
                goto err_type;
-       }
+
        return 0;
 
 err_type:
        debugfs_remove(type);
 err_dir:
        debugfs_remove(d);
-err_return:
-       return error;
+       return -ENOMEM;
 }
 
 static int __init create_setup_data_nodes(struct dentry *parent)
 {
        struct setup_data_node *node;
        struct setup_data *data;
-       int error, no = 0;
+       int error = -ENOMEM;
        struct dentry *d;
        struct page *pg;
        u64 pa_data;
+       int no = 0;
 
        d = debugfs_create_dir("setup_data", parent);
-       if (!d) {
-               error = -ENOMEM;
-               goto err_return;
-       }
+       if (!d)
+               return -ENOMEM;
 
        pa_data = boot_params.hdr.setup_data;
 
        while (pa_data) {
                node = kmalloc(sizeof(*node), GFP_KERNEL);
-               if (!node) {
-                       error = -ENOMEM;
+               if (!node)
                        goto err_dir;
-               }
+
                pg = pfn_to_page((pa_data+sizeof(*data)-1) >> PAGE_SHIFT);
                if (PageHighMem(pg)) {
                        data = ioremap_cache(pa_data, sizeof(*data));
@@ -143,9 +137,8 @@ static int __init create_setup_data_nodes(struct dentry *parent)
                                error = -ENXIO;
                                goto err_dir;
                        }
-               } else {
+               } else
                        data = __va(pa_data);
-               }
 
                node->paddr = pa_data;
                node->type = data->type;
@@ -159,11 +152,11 @@ static int __init create_setup_data_nodes(struct dentry *parent)
                        goto err_dir;
                no++;
        }
+
        return 0;
 
 err_dir:
        debugfs_remove(d);
-err_return:
        return error;
 }
 
@@ -175,28 +168,26 @@ static struct debugfs_blob_wrapper boot_params_blob = {
 static int __init boot_params_kdebugfs_init(void)
 {
        struct dentry *dbp, *version, *data;
-       int error;
+       int error = -ENOMEM;
 
        dbp = debugfs_create_dir("boot_params", NULL);
-       if (!dbp) {
-               error = -ENOMEM;
-               goto err_return;
-       }
+       if (!dbp)
+               return -ENOMEM;
+
        version = debugfs_create_x16("version", S_IRUGO, dbp,
                                     &boot_params.hdr.version);
-       if (!version) {
-               error = -ENOMEM;
+       if (!version)
                goto err_dir;
-       }
+
        data = debugfs_create_blob("data", S_IRUGO, dbp,
                                   &boot_params_blob);
-       if (!data) {
-               error = -ENOMEM;
+       if (!data)
                goto err_version;
-       }
+
        error = create_setup_data_nodes(dbp);
        if (error)
                goto err_data;
+
        return 0;
 
 err_data:
@@ -205,10 +196,9 @@ err_version:
        debugfs_remove(version);
 err_dir:
        debugfs_remove(dbp);
-err_return:
        return error;
 }
-#endif
+#endif /* CONFIG_DEBUG_BOOT_PARAMS */
 
 static int __init arch_kdebugfs_init(void)
 {