path: root/fs
diff options
authorLinus Torvalds <torvalds@linux-foundation.org>2015-12-03 15:45:16 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2015-12-03 15:45:16 -0800
commit2873d32ff493ecbfb7d2c7f56812ab941dda42f4 (patch)
treeaf8fb130771ed42f9995f16ac26a33ccf816d0a5 /fs
parentMerge tag 'trace-v4.4-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace (diff)
parentnvme: temporary fix for Apple controller reset (diff)
Merge branch 'for-linus' of git://git.kernel.dk/linux-block
Pull block fixes from Jens Axboe: "A collection of fixes from this series. The most important here is a regression fix for an issue that some folks would hit in blk-merge.c, and the NVMe queue depth limit for the screwed up Apple "nvme" controller. In more detail, this pull request contains: - a set of fixes for null_blk, including a fix for a few corner cases where we could hang the device. From Arianna and Paolo. - lightnvm: - A build improvement from Keith. - Update the qemu pci id detection from Matias. - Error handling fixes for leaks and other little fixes from Sudip and Wenwei. - fix from Eric where BLKRRPART would not return EBUSY for whole device mounts, only when partitions were mounted. - fix from Jan Kara, where EOF O_DIRECT reads would return negatively. - remove check for rq_mergeable() when checking limits for cloned requests. The check doesn't make any sense. It's assuming that since NOMERGE is set on the request that we don't have to recalculate limits since the request didn't change, but that's not true if the request has been redirected. From Hannes. - correctly get the bio front segment value set for single segment bio's, fixing a BUG() in blk-merge. From Ming" * 'for-linus' of git://git.kernel.dk/linux-block: nvme: temporary fix for Apple controller reset null_blk: change type of completion_nsec to unsigned long null_blk: guarantee device restart in all irq modes null_blk: set a separate timer for each command blk-merge: fix computing bio->bi_seg_front_size in case of single segment direct-io: Fix negative return from dio read beyond eof block: Always check queue limits for cloned requests lightnvm: missing nvm_lock acquire lightnvm: unconverted ppa returned in get_bb_tbl lightnvm: refactor and change vendor id for qemu lightnvm: do device max sectors boundary check first lightnvm: fix ioctl memory leaks lightnvm: free memory when gennvm register fails lightnvm: Simplify config when disabled Return EBUSY from BLKRRPART for mounted whole-dev fs
Diffstat (limited to 'fs')
1 files changed, 9 insertions, 1 deletions
diff --git a/fs/direct-io.c b/fs/direct-io.c
index cb5337d8c273..1c75a3a07f8f 100644
--- a/fs/direct-io.c
+++ b/fs/direct-io.c
@@ -1169,6 +1169,15 @@ do_blockdev_direct_IO(struct kiocb *iocb, struct inode *inode,
+ /* Once we sampled i_size check for reads beyond EOF */
+ dio->i_size = i_size_read(inode);
+ if (iov_iter_rw(iter) == READ && offset >= dio->i_size) {
+ if (dio->flags & DIO_LOCKING)
+ mutex_unlock(&inode->i_mutex);
+ kmem_cache_free(dio_cache, dio);
+ goto out;
+ }
* For file extending writes updating i_size before data writeouts
* complete can expose uninitialized blocks in dumb filesystems.
@@ -1222,7 +1231,6 @@ do_blockdev_direct_IO(struct kiocb *iocb, struct inode *inode,
sdio.next_block_for_io = -1;
dio->iocb = iocb;
- dio->i_size = i_size_read(inode);
dio->refcount = 1;