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gfs2: Always check the result of gfs2_rbm_from_block 

When gfs2_rbm_from_block fails, the rbm it returns is undefined, so we
always want to make sure gfs2_rbm_from_block has succeeded before
looking at the rbm.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Reviewed-by: Steven Whitehouse <swhiteho@redhat.com>
This commit is contained in:
Andreas Gruenbacher 2018-09-10 17:31:47 +01:00 committed by Bob Peterson
parent 6ddc5c3ddf
commit f654683dae
1 changed files with 8 additions and 3 deletions
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11
fs/gfs2/rgrp.c
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@ -2233,7 +2233,8 @@ static struct gfs2_rgrpd *rgblk_free(struct gfs2_sbd *sdp, u64 bstart,
return NULL;
}
gfs2_rbm_from_block(&rbm, bstart);
if (WARN_ON_ONCE(gfs2_rbm_from_block(&rbm, bstart)))
return NULL;
while (blen--) {
bi = rbm_bi(&rbm);
if (bi != bi_prev) {
@ -2366,7 +2367,10 @@ static void gfs2_set_alloc_start(struct gfs2_rbm *rbm,
else
goal = rbm->rgd->rd_last_alloc + rbm->rgd->rd_data0;
gfs2_rbm_from_block(rbm, goal);
if (WARN_ON_ONCE(gfs2_rbm_from_block(rbm, goal))) {
rbm->bii = 0;
rbm->offset = 0;
}
}
/**
@ -2575,7 +2579,8 @@ int gfs2_check_blk_type(struct gfs2_sbd *sdp, u64 no_addr, unsigned int type)
rbm.rgd = rgd;
error = gfs2_rbm_from_block(&rbm, no_addr);
WARN_ON_ONCE(error != 0);
if (WARN_ON_ONCE(error))
goto fail;
if (gfs2_testbit(&rbm, false) != type)
error = -ESTALE;