mtd: block2mtd: page index should use pgoff_t

Page index use pgoff_t to prevent risk of truncation.

Signed-off-by: Liu Song <liu.song11@zte.com.cn>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>

diff --git a/drivers/mtd/devices/block2mtd.c b/drivers/mtd/devices/block2mtd.c
index 410a321682e6589405c2fd5f11956e15b44b22e9..36aa082f6db0c054a7b69f851391544fc7575ec9 100644 (file)
--- a/drivers/mtd/devices/block2mtd.c
+++ b/drivers/mtd/devices/block2mtd.c
@@ -44,7 +44,7 @@ struct block2mtd_dev {
 static LIST_HEAD(blkmtd_device_list);
 
 
-static struct page *page_read(struct address_space *mapping, int index)
+static struct page *page_read(struct address_space *mapping, pgoff_t index)
 {
        return read_mapping_page(mapping, index, NULL);
 }
@@ -54,7 +54,7 @@ static int _block2mtd_erase(struct block2mtd_dev *dev, loff_t to, size_t len)
 {
        struct address_space *mapping = dev->blkdev->bd_inode->i_mapping;
        struct page *page;
-       int index = to >> PAGE_SHIFT;   // page index
+       pgoff_t index = to >> PAGE_SHIFT;       // page index
        int pages = len >> PAGE_SHIFT;
        u_long *p;
        u_long *max;
@@ -103,7 +103,7 @@ static int block2mtd_read(struct mtd_info *mtd, loff_t from, size_t len,
 {
        struct block2mtd_dev *dev = mtd->priv;
        struct page *page;
-       int index = from >> PAGE_SHIFT;
+       pgoff_t index = from >> PAGE_SHIFT;
        int offset = from & (PAGE_SIZE-1);
        int cpylen;
 
@@ -137,7 +137,7 @@ static int _block2mtd_write(struct block2mtd_dev *dev, const u_char *buf,
 {
        struct page *page;
        struct address_space *mapping = dev->blkdev->bd_inode->i_mapping;
-       int index = to >> PAGE_SHIFT;   // page index
+       pgoff_t index = to >> PAGE_SHIFT;       // page index
        int offset = to & ~PAGE_MASK;   // page offset
        int cpylen;