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| author | Dan Williams <dan.j.williams@intel.com> | 2017-05-10 19:38:13 -0700 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2017-05-10 21:46:55 -0700 |
| commit | e84b83b9ee2187817cf895471675f1ccdf64cd53 (patch) | |
| tree | 5cfe0788dff1536475ce68c9c2241327e545d8b3 | |
| parent | b177fe85dd27de1ee4c29f59c4e82b3ea3b78784 (diff) | |
| download | linux-e84b83b9ee2187817cf895471675f1ccdf64cd53.tar.bz2 | |
filesystem-dax: fix broken __dax_zero_page_range() conversion
The conversion of __dax_zero_page_range() to 'struct dax_operations'
caused it to frequently fail. The mistake was treating the @size
parameter as a dax mapping length rather than just a length of the
clear_pmem() operation. The dax mapping length is assumed to be hard
coded as PAGE_SIZE.
Without this fix any page unaligned zeroing request will trigger a
-EINVAL return from bdev_dax_pgoff().
Cc: Jan Kara <jack@suse.com>
Cc: Christoph Hellwig <hch@lst.de>
Reported-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Tested-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Fixes: cccbce671582 ("filesystem-dax: convert to dax_direct_access()")
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
| -rw-r--r-- | fs/dax.c | 4 |
1 files changed, 2 insertions, 2 deletions
@@ -971,12 +971,12 @@ int __dax_zero_page_range(struct block_device *bdev, void *kaddr; pfn_t pfn; - rc = bdev_dax_pgoff(bdev, sector, size, &pgoff); + rc = bdev_dax_pgoff(bdev, sector, PAGE_SIZE, &pgoff); if (rc) return rc; id = dax_read_lock(); - rc = dax_direct_access(dax_dev, pgoff, PHYS_PFN(size), &kaddr, + rc = dax_direct_access(dax_dev, pgoff, 1, &kaddr, &pfn); if (rc < 0) { dax_read_unlock(id); |