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authorKeith Busch <kbusch@kernel.org>2022-06-10 12:58:30 -0700
committerJens Axboe <axboe@kernel.dk>2022-06-27 06:29:11 -0600
commitbf8d08532bc19a14cfb54ae61099dccadefca446 (patch)
treef30d21fa72dc1d8616119dc9d741d8638984e668 /fs/iomap
parentb1a000d3b8ec582da64bb644be633e5a0beffcbf (diff)
iomap: add support for dma aligned direct-io
Use the address alignment requirements from the block_device for direct io instead of requiring addresses be aligned to the block size. Signed-off-by: Keith Busch <kbusch@kernel.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20220610195830.3574005-12-kbusch@fb.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'fs/iomap')
-rw-r--r--fs/iomap/direct-io.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/iomap/direct-io.c b/fs/iomap/direct-io.c
index 370c3241618a..5d098adba443 100644
--- a/fs/iomap/direct-io.c
+++ b/fs/iomap/direct-io.c
@@ -242,7 +242,6 @@ static loff_t iomap_dio_bio_iter(const struct iomap_iter *iter,
struct inode *inode = iter->inode;
unsigned int blkbits = blksize_bits(bdev_logical_block_size(iomap->bdev));
unsigned int fs_block_size = i_blocksize(inode), pad;
- unsigned int align = iov_iter_alignment(dio->submit.iter);
loff_t length = iomap_length(iter);
loff_t pos = iter->pos;
unsigned int bio_opf;
@@ -253,7 +252,8 @@ static loff_t iomap_dio_bio_iter(const struct iomap_iter *iter,
size_t copied = 0;
size_t orig_count;
- if ((pos | length | align) & ((1 << blkbits) - 1))
+ if ((pos | length) & ((1 << blkbits) - 1) ||
+ !bdev_iter_is_aligned(iomap->bdev, dio->submit.iter))
return -EINVAL;
if (iomap->type == IOMAP_UNWRITTEN) {