From bf8d08532bc19a14cfb54ae61099dccadefca446 Mon Sep 17 00:00:00 2001 From: Keith Busch Date: Fri, 10 Jun 2022 12:58:30 -0700 Subject: 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 Reviewed-by: Christoph Hellwig Link: https://lore.kernel.org/r/20220610195830.3574005-12-kbusch@fb.com Signed-off-by: Jens Axboe --- fs/iomap/direct-io.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'fs/iomap') 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) { -- cgit v1.2.3