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authorDavid Woodhouse <David.Woodhouse@intel.com>2008-07-25 10:40:14 -0400
committerDavid Woodhouse <David.Woodhouse@intel.com>2008-07-25 10:40:14 -0400
commitff877ea80efa2015b6263766f78ee42c2a1b32f9 (patch)
tree85205005c611ab774702148558321c6fb92f1ccd /drivers/mtd/mtdchar.c
parent30821fee4f0cb3e6d241d9f7ddc37742212e3eb7 (diff)
parentd37e6bf68fc1eb34a4ad21d9ae8890ed37ea80e7 (diff)
downloadop-kernel-dev-ff877ea80efa2015b6263766f78ee42c2a1b32f9.zip
op-kernel-dev-ff877ea80efa2015b6263766f78ee42c2a1b32f9.tar.gz
Merge branch 'linux-next' of git://git.infradead.org/~dedekind/ubi-2.6
Diffstat (limited to 'drivers/mtd/mtdchar.c')
-rw-r--r--drivers/mtd/mtdchar.c31
1 files changed, 22 insertions, 9 deletions
diff --git a/drivers/mtd/mtdchar.c b/drivers/mtd/mtdchar.c
index f5061fe..d2f3318 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 */
/*====================================================================*/
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