diff options
Diffstat (limited to 'drivers/dax/super.c')
| -rw-r--r-- | drivers/dax/super.c | 23 |
1 files changed, 6 insertions, 17 deletions
diff --git a/drivers/dax/super.c b/drivers/dax/super.c index c8500b7e2d8a..f2cef47bdeaf 100644 --- a/drivers/dax/super.c +++ b/drivers/dax/super.c @@ -92,6 +92,12 @@ struct dax_device *fs_dax_get_by_bdev(struct block_device *bdev) if (!blk_queue_dax(bdev->bd_disk->queue)) return NULL; + if ((get_start_sect(bdev) * SECTOR_SIZE) % PAGE_SIZE || + (bdev_nr_sectors(bdev) * SECTOR_SIZE) % PAGE_SIZE) { + pr_info("%pg: error: unaligned partition for dax\n", bdev); + return NULL; + } + id = dax_read_lock(); dax_dev = xa_load(&dax_hosts, (unsigned long)bdev->bd_disk); if (!dax_dev || !dax_alive(dax_dev) || !igrab(&dax_dev->inode)) @@ -106,10 +112,6 @@ bool generic_fsdax_supported(struct dax_device *dax_dev, struct block_device *bdev, int blocksize, sector_t start, sector_t sectors) { - pgoff_t pgoff, pgoff_end; - sector_t last_page; - int err; - if (blocksize != PAGE_SIZE) { pr_info("%pg: error: unsupported blocksize for dax\n", bdev); return false; @@ -120,19 +122,6 @@ bool generic_fsdax_supported(struct dax_device *dax_dev, return false; } - err = bdev_dax_pgoff(bdev, start, PAGE_SIZE, &pgoff); - if (err) { - pr_info("%pg: error: unaligned partition for dax\n", bdev); - return false; - } - - last_page = PFN_DOWN((start + sectors - 1) * 512) * PAGE_SIZE / 512; - err = bdev_dax_pgoff(bdev, last_page, PAGE_SIZE, &pgoff_end); - if (err) { - pr_info("%pg: error: unaligned partition for dax\n", bdev); - return false; - } - return true; } EXPORT_SYMBOL_GPL(generic_fsdax_supported); |