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GFS2: Fix one RG corner case 

For filesystems with only a single resource group, we need to be careful
that the allocation loop will not land up with a NULL resource group. This
fixes a bug in a previous patch where the gfs2_rgrpd_get_next() function
was being used instead of gfs2_rgrpd_get_first()

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
This commit is contained in:
Steven Whitehouse 2012-11-13 14:50:35 +00:00
parent 4327a9bf71
commit aa8920c968
1 changed files with 2 additions and 1 deletions
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3
fs/gfs2/rgrp.c
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@ -1776,10 +1776,11 @@ static u32 gfs2_orlov_skip(const struct gfs2_inode *ip)
static bool gfs2_select_rgrp(struct gfs2_rgrpd **pos, const struct gfs2_rgrpd *begin)
{
struct gfs2_rgrpd *rgd = *pos;
struct gfs2_sbd *sdp = rgd->rd_sbd;
rgd = gfs2_rgrpd_get_next(rgd);
if (rgd == NULL)
rgd = gfs2_rgrpd_get_next(NULL);
rgd = gfs2_rgrpd_get_first(sdp);
*pos = rgd;
if (rgd != begin) /* If we didn't wrap */
return true;