[PATCH vfs.all 18/26] scsi: use bdev helper in scsi_bios_ptable()

[Yu Kuai <yukuai1@huaweicloud.com>]

From: Yu Kuai <yukuai3@huawei.com>

scsi_bios_ptable() is reading without opening disk as file, use the new
helper to read into block device page cache to prevent access bd_inode
directly from scsi.

Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jan Kara <jack@suse.cz>
---
 drivers/scsi/scsicam.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/scsi/scsicam.c b/drivers/scsi/scsicam.c
index e2c7d8ef205f..1c99b964a0eb 100644
--- a/drivers/scsi/scsicam.c
+++ b/drivers/scsi/scsicam.c
@@ -32,11 +32,10 @@
  */
 unsigned char *scsi_bios_ptable(struct block_device *dev)
 {
-	struct address_space *mapping = bdev_whole(dev)->bd_inode->i_mapping;
 	unsigned char *res = NULL;
 	struct folio *folio;
 
-	folio = read_mapping_folio(mapping, 0, NULL);
+	folio = bdev_read_folio(bdev_whole(dev), 0);
 	if (IS_ERR(folio))
 		return NULL;
 
-- 
2.39.2