diff options
Diffstat (limited to 'drivers/mtd/mtdchar.c')
| -rw-r--r-- | drivers/mtd/mtdchar.c | 31 |
1 files changed, 22 insertions, 9 deletions
diff --git a/drivers/mtd/mtdchar.c b/drivers/mtd/mtdchar.c index f5061fe72e4..d2f331876e4 100644 --- a/drivers/mtd/mtdchar.c +++ b/drivers/mtd/mtdchar.c @@ -12,6 +12,7 @@ #include <linux/module.h> #include <linux/slab.h> #include <linux/sched.h> +#include <linux/smp_lock.h> #include <linux/mtd/mtd.h> #include <linux/mtd/compatmac.h> @@ -25,10 +26,13 @@ static void mtd_notify_add(struct mtd_info* mtd) if (!mtd) return; - device_create(mtd_class, NULL, MKDEV(MTD_CHAR_MAJOR, mtd->index*2), "mtd%d", mtd->index); + device_create_drvdata(mtd_class, NULL, + MKDEV(MTD_CHAR_MAJOR, mtd->index*2), + NULL, "mtd%d", mtd->index); - device_create(mtd_class, NULL, - MKDEV(MTD_CHAR_MAJOR, mtd->index*2+1), "mtd%dro", mtd->index); + device_create_drvdata(mtd_class, NULL, + MKDEV(MTD_CHAR_MAJOR, mtd->index*2+1), + NULL, "mtd%dro", mtd->index); } static void mtd_notify_remove(struct mtd_info* mtd) @@ -84,6 +88,7 @@ static int mtd_open(struct inode *inode, struct file *file) { int minor = iminor(inode); int devnum = minor >> 1; + int ret = 0; struct mtd_info *mtd; struct mtd_file_info *mfi; @@ -96,31 +101,39 @@ static int mtd_open(struct inode *inode, struct file *file) if ((file->f_mode & 2) && (minor & 1)) return -EACCES; + lock_kernel(); mtd = get_mtd_device(NULL, devnum); - if (IS_ERR(mtd)) - return PTR_ERR(mtd); + if (IS_ERR(mtd)) { + ret = PTR_ERR(mtd); + goto out; + } if (MTD_ABSENT == mtd->type) { put_mtd_device(mtd); - return -ENODEV; + ret = -ENODEV; + goto out; } /* You can't open it RW if it's not a writeable device */ if ((file->f_mode & 2) && !(mtd->flags & MTD_WRITEABLE)) { put_mtd_device(mtd); - return -EACCES; + ret = -EACCES; + goto out; } mfi = kzalloc(sizeof(*mfi), GFP_KERNEL); if (!mfi) { put_mtd_device(mtd); - return -ENOMEM; + ret = -ENOMEM; + goto out; } mfi->mtd = mtd; file->private_data = mfi; - return 0; +out: + unlock_kernel(); + return ret; } /* mtd_open */ /*====================================================================*/ |