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-rw-r--r--fs/block_dev.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/fs/block_dev.c b/fs/block_dev.c
index da020be..d9bdf2b 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -190,6 +190,12 @@ static struct page *blk_get_page(unsigned long addr, size_t count, int rw,
return pvec->page[pvec->idx++];
}
+/* return a page back to pvec array */
+static void blk_unget_page(struct page *page, struct pvec *pvec)
+{
+ pvec->page[--pvec->idx] = page;
+}
+
static ssize_t
blkdev_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov,
loff_t pos, unsigned long nr_segs)
@@ -278,6 +284,8 @@ same_bio:
count = min(count, nbytes);
goto same_bio;
}
+ } else {
+ blk_unget_page(page, &pvec);
}
/* bio is ready, submit it */
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