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GFS2: Locking order fix in gfs2_check_blk_state 

In some cases we already have the rindex lock when
we enter this function.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
This commit is contained in:
Steven Whitehouse 2009-11-06 11:10:51 +00:00
parent 1579343a73
commit 2c77634965
1 changed files with 10 additions and 4 deletions
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14
fs/gfs2/rgrp.c
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@ -1710,11 +1710,16 @@ int gfs2_check_blk_type(struct gfs2_sbd *sdp, u64 no_addr, unsigned int type)
{
struct gfs2_rgrpd *rgd;
struct gfs2_holder ri_gh, rgd_gh;
struct gfs2_inode *ip = GFS2_I(sdp->sd_rindex);
int ri_locked = 0;
int error;
error = gfs2_rindex_hold(sdp, &ri_gh);
if (error)
goto fail;
if (!gfs2_glock_is_locked_by_me(ip->i_gl)) {
error = gfs2_rindex_hold(sdp, &ri_gh);
if (error)
goto fail;
ri_locked = 1;
}
error = -EINVAL;
rgd = gfs2_blk2rgrpd(sdp, no_addr);
@ -1730,7 +1735,8 @@ int gfs2_check_blk_type(struct gfs2_sbd *sdp, u64 no_addr, unsigned int type)
gfs2_glock_dq_uninit(&rgd_gh);
fail_rindex:
gfs2_glock_dq_uninit(&ri_gh);
if (ri_locked)
gfs2_glock_dq_uninit(&ri_gh);
fail:
return error;
}