Merge tag 'please-pull-root_bus_hotplug' of git://git.kernel.org/pub/scm/linux/kernel...

[karo-tx-linux.git] / drivers / mtd / mtdchar.c

diff --git a/drivers/mtd/mtdchar.c b/drivers/mtd/mtdchar.c
index dc571ebc1aa0be8680f4a20397653e9d4a7f84cf..684bfa39e4ee4892f901874c52c699fa71fd572a 100644 (file)
--- a/drivers/mtd/mtdchar.c
+++ b/drivers/mtd/mtdchar.c
@@ -38,6 +38,8 @@
 
 #include <asm/uaccess.h>
 
+#include "mtdcore.h"
+
 static DEFINE_MUTEX(mtd_mutex);
 
 /*
@@ -53,25 +55,7 @@ struct mtd_file_info {
 static loff_t mtdchar_lseek(struct file *file, loff_t offset, int orig)
 {
        struct mtd_file_info *mfi = file->private_data;
-       struct mtd_info *mtd = mfi->mtd;
-
-       switch (orig) {
-       case SEEK_SET:
-               break;
-       case SEEK_CUR:
-               offset += file->f_pos;
-               break;
-       case SEEK_END:
-               offset += mtd->size;
-               break;
-       default:
-               return -EINVAL;
-       }
-
-       if (offset >= 0 && offset <= mtd->size)
-               return file->f_pos = offset;
-
-       return -EINVAL;
+       return fixed_size_llseek(file, offset, orig, mfi->mtd->size);
 }
 
 static int count;
@@ -365,37 +349,35 @@ static void mtdchar_erase_callback (struct erase_info *instr)
        wake_up((wait_queue_head_t *)instr->priv);
 }
 
-#ifdef CONFIG_HAVE_MTD_OTP
 static int otp_select_filemode(struct mtd_file_info *mfi, int mode)
 {
        struct mtd_info *mtd = mfi->mtd;
        size_t retlen;
-       int ret = 0;
-
-       /*
-        * Make a fake call to mtd_read_fact_prot_reg() to check if OTP
-        * operations are supported.
-        */
-       if (mtd_read_fact_prot_reg(mtd, -1, 0, &retlen, NULL) == -EOPNOTSUPP)
-               return -EOPNOTSUPP;
 
        switch (mode) {
        case MTD_OTP_FACTORY:
+               if (mtd_read_fact_prot_reg(mtd, -1, 0, &retlen, NULL) ==
+                               -EOPNOTSUPP)
+                       return -EOPNOTSUPP;
+
                mfi->mode = MTD_FILE_MODE_OTP_FACTORY;
                break;
        case MTD_OTP_USER:
+               if (mtd_read_user_prot_reg(mtd, -1, 0, &retlen, NULL) ==
+                               -EOPNOTSUPP)
+                       return -EOPNOTSUPP;
+
                mfi->mode = MTD_FILE_MODE_OTP_USER;
                break;
-       default:
-               ret = -EINVAL;
        case MTD_OTP_OFF:
+               mfi->mode = MTD_FILE_MODE_NORMAL;
                break;
+       default:
+               return -EINVAL;
        }
-       return ret;
+
+       return 0;
 }
-#else
-# define otp_select_filemode(f,m)      -EOPNOTSUPP
-#endif
 
 static int mtdchar_writeoob(struct file *file, struct mtd_info *mtd,
        uint64_t start, uint32_t length, void __user *ptr,
@@ -888,7 +870,6 @@ static int mtdchar_ioctl(struct file *file, u_int cmd, u_long arg)
                break;
        }
 
-#ifdef CONFIG_HAVE_MTD_OTP
        case OTPSELECT:
        {
                int mode;
@@ -944,7 +925,6 @@ static int mtdchar_ioctl(struct file *file, u_int cmd, u_long arg)
                ret = mtd_lock_user_prot_reg(mtd, oinfo.start, oinfo.length);
                break;
        }
-#endif
 
        /* This ioctl is being deprecated - it truncates the ECC layout */
        case ECCGETLAYOUT:
@@ -1185,23 +1165,25 @@ static struct file_system_type mtd_inodefs_type = {
 };
 MODULE_ALIAS_FS("mtd_inodefs");
 
-static int __init init_mtdchar(void)
+int __init init_mtdchar(void)
 {
        int ret;
 
        ret = __register_chrdev(MTD_CHAR_MAJOR, 0, 1 << MINORBITS,
                                   "mtd", &mtd_fops);
        if (ret < 0) {
-               pr_notice("Can't allocate major number %d for "
-                               "Memory Technology Devices.\n", MTD_CHAR_MAJOR);
+               pr_err("Can't allocate major number %d for MTD\n",
+                      MTD_CHAR_MAJOR);
                return ret;
        }
 
        ret = register_filesystem(&mtd_inodefs_type);
        if (ret) {
-               pr_notice("Can't register mtd_inodefs filesystem: %d\n", ret);
+               pr_err("Can't register mtd_inodefs filesystem, error %d\n",
+                      ret);
                goto err_unregister_chdev;
        }
+
        return ret;
 
 err_unregister_chdev:
@@ -1209,18 +1191,10 @@ err_unregister_chdev:
        return ret;
 }
 
-static void __exit cleanup_mtdchar(void)
+void __exit cleanup_mtdchar(void)
 {
        unregister_filesystem(&mtd_inodefs_type);
        __unregister_chrdev(MTD_CHAR_MAJOR, 0, 1 << MINORBITS, "mtd");
 }
 
-module_init(init_mtdchar);
-module_exit(cleanup_mtdchar);
-
-MODULE_ALIAS_CHARDEV_MAJOR(MTD_CHAR_MAJOR);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
-MODULE_DESCRIPTION("Direct character-device access to MTD devices");
 MODULE_ALIAS_CHARDEV_MAJOR(MTD_CHAR_MAJOR);