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xfs: check for null dquot in xfs_quota_calc_throttle() 

Coverity spotted this.

Granted, we *just* checked xfs_inod_dquot() in the caller (by
calling xfs_quota_need_throttle). However, this is the only place we
don't check the return value but the check is cheap and future-proof
so add it.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
This commit is contained in:
Eric Sandeen 2014-10-02 09:27:09 +10:00 committed by Dave Chinner
parent 04dd1a0d4b
commit 5cca3f611d
1 changed files with 2 additions and 2 deletions
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4
fs/xfs/xfs_iomap.c
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@ -404,8 +404,8 @@ xfs_quota_calc_throttle(
int shift = 0; int shift = 0;
struct xfs_dquot *dq = xfs_inode_dquot(ip, type); struct xfs_dquot *dq = xfs_inode_dquot(ip, type);
/* over hi wmark, squash the prealloc completely */ /* no dq, or over hi wmark, squash the prealloc completely */
if (dq->q_res_bcount >= dq->q_prealloc_hi_wmark) { if (!dq || dq->q_res_bcount >= dq->q_prealloc_hi_wmark) {
*qblocks = 0; *qblocks = 0;
*qfreesp = 0; *qfreesp = 0;
return; return;