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authorMatthew Wilcox <willy@infradead.org>2017-10-14 01:58:15 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2017-10-14 02:18:33 +0300
commitf892760aa66a2d657deaf59538fb69433036767c (patch)
tree3a1cbccecb6c363e4fcc922127867ca89972e655 /fs/block_dev.c
parente8c97af0c1f23d6ffedcaa3918861f2595e1db62 (diff)
downloadlinux-f892760aa66a2d657deaf59538fb69433036767c.tar.xz
fs/mpage.c: fix mpage_writepage() for pages with buffers
When using FAT on a block device which supports rw_page, we can hit BUG_ON(!PageLocked(page)) in try_to_free_buffers(). This is because we call clean_buffers() after unlocking the page we've written. Introduce a new clean_page_buffers() which cleans all buffers associated with a page and call it from within bdev_write_page(). [akpm@linux-foundation.org: s/PAGE_SIZE/~0U/ per Linus and Matthew] Link: http://lkml.kernel.org/r/20171006211541.GA7409@bombadil.infradead.org Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com> Reported-by: Toshi Kani <toshi.kani@hpe.com> Reported-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Tested-by: Toshi Kani <toshi.kani@hpe.com> Acked-by: Johannes Thumshirn <jthumshirn@suse.de> Cc: Ross Zwisler <ross.zwisler@linux.intel.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/block_dev.c')
-rw-r--r--fs/block_dev.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/fs/block_dev.c b/fs/block_dev.c
index 93d088ffc05c..789f55e851ae 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -716,10 +716,12 @@ int bdev_write_page(struct block_device *bdev, sector_t sector,
set_page_writeback(page);
result = ops->rw_page(bdev, sector + get_start_sect(bdev), page, true);
- if (result)
+ if (result) {
end_page_writeback(page);
- else
+ } else {
+ clean_page_buffers(page);
unlock_page(page);
+ }
blk_queue_exit(bdev->bd_queue);
return result;
}