From: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Date: Mon, 11 Jan 2010 18:32:24 +0000 (+0900)
Subject: fat: Fix vfat_lookup()
X-Git-Tag: v2.6.34-rc2~58^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8045e2985012bdb95d832dfbcceae1815880a6ed;p=pandora-kernel.git

fat: Fix vfat_lookup()

After d_find_alias(), vfat_lookup() checks !(->d_flags & DCACHE_DISCONNECTED)
without IS_ROOT().  This means it hits non-anonymous but disconnected
dentry. (NOTE: d_splice_alias() doesn't clear DCACHE_DISCONNECTED)

But, vfat_lookup() has interest to alias if it was non-anonymous. So,
this adds vfat_d_anon_disconn() helper to check it correctly.

Another bug is refcnt leak. It needs dput() for uninterested alias.

Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
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