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block: mark bdev files as FMODE_NOWAIT if underlying device supports it

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We set this unconditionally, but it really should be dependent on if
the underlying device is nowait compliant.

Cc: linux-block@vger.kernel.org
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20230509151910.183637-3-axboe@kernel.dk
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe
2023-05-09 09:19:09 -06:00
parent fe34db062b
commit e9833d8701
1 changed files with 4 additions and 1 deletions
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5
block/fops.c
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@@ -481,7 +481,7 @@ static int blkdev_open(struct inode *inode, struct file *filp)
* during an unstable branch. * during an unstable branch.
*/ */
filp->f_flags |= O_LARGEFILE; filp->f_flags |= O_LARGEFILE;
filp->f_mode |= FMODE_NOWAIT | FMODE_BUF_RASYNC; filp->f_mode |= FMODE_BUF_RASYNC;
if (filp->f_flags & O_NDELAY) if (filp->f_flags & O_NDELAY)
filp->f_mode |= FMODE_NDELAY; filp->f_mode |= FMODE_NDELAY;
@@ -494,6 +494,9 @@ static int blkdev_open(struct inode *inode, struct file *filp)
if (IS_ERR(bdev)) if (IS_ERR(bdev))
return PTR_ERR(bdev); return PTR_ERR(bdev);
if (bdev_nowait(bdev))
filp->f_mode |= FMODE_NOWAIT;
filp->private_data = bdev; filp->private_data = bdev;
filp->f_mapping = bdev->bd_inode->i_mapping; filp->f_mapping = bdev->bd_inode->i_mapping;
filp->f_wb_err = filemap_sample_wb_err(filp->f_mapping); filp->f_wb_err = filemap_sample_wb_err(filp->f_mapping);