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md: check return code of read_sb_page 

Function read_sb_page may return ERR_PTR(...). Check for it.

Signed-off-by: Vasiliy Kulikov <segooon@gmail.com>
Cc: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: NeilBrown <neilb@suse.de>
This commit is contained in:
Vasiliy Kulikov 2010-10-01 14:18:12 -07:00 committed by NeilBrown
parent db8d9d3591
commit 5c04f5512f
1 changed files with 5 additions and 4 deletions
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9
drivers/md/bitmap.c
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@ -1000,10 +1000,11 @@ static int bitmap_init_from_disk(struct bitmap *bitmap, sector_t start)
page = bitmap->sb_page;
offset = sizeof(bitmap_super_t);
if (!file)
read_sb_page(bitmap->mddev,
bitmap->mddev->bitmap_info.offset,
page,
index, count);
page = read_sb_page(
bitmap->mddev,
bitmap->mddev->bitmap_info.offset,
page,
index, count);
} else if (file) {
page = read_page(file, index, bitmap, count);
offset = 0;