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authorTejun Heo <tj@kernel.org>2013-02-27 17:05:00 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2013-02-27 19:10:20 -0800
commit94960e8c2e69d1e4c01c10c7b00bc0f7eba49fa1 (patch)
treea5b5cedf37c74644277c86d3f6e2514920ecde24 /net
parent9475af6e44d2c17583243c253e2464467b52fa50 (diff)
downloadlinaro-lsk-94960e8c2e69d1e4c01c10c7b00bc0f7eba49fa1.tar.gz
sctp: convert to idr_alloc()
Convert to the much saner new idr interface. Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Neil Horman <nhorman@tuxdriver.com> Acked-by: Vlad Yasevich <vyasevich@gmail.com> Cc: Sridhar Samudrala <sri@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'net')
-rw-r--r--net/sctp/associola.c31
1 files changed, 15 insertions, 16 deletions
diff --git a/net/sctp/associola.c b/net/sctp/associola.c
index 2f95f5a5145..43cd0dd9149 100644
--- a/net/sctp/associola.c
+++ b/net/sctp/associola.c
@@ -1591,32 +1591,31 @@ int sctp_assoc_lookup_laddr(struct sctp_association *asoc,
/* Set an association id for a given association */
int sctp_assoc_set_id(struct sctp_association *asoc, gfp_t gfp)
{
- int assoc_id;
- int error = 0;
+ bool preload = gfp & __GFP_WAIT;
+ int ret;
/* If the id is already assigned, keep it. */
if (asoc->assoc_id)
- return error;
-retry:
- if (unlikely(!idr_pre_get(&sctp_assocs_id, gfp)))
- return -ENOMEM;
+ return 0;
+ if (preload)
+ idr_preload(gfp);
spin_lock_bh(&sctp_assocs_id_lock);
- error = idr_get_new_above(&sctp_assocs_id, (void *)asoc,
- idr_low, &assoc_id);
- if (!error) {
- idr_low = assoc_id + 1;
+ /* 0 is not a valid id, idr_low is always >= 1 */
+ ret = idr_alloc(&sctp_assocs_id, asoc, idr_low, 0, GFP_NOWAIT);
+ if (ret >= 0) {
+ idr_low = ret + 1;
if (idr_low == INT_MAX)
idr_low = 1;
}
spin_unlock_bh(&sctp_assocs_id_lock);
- if (error == -EAGAIN)
- goto retry;
- else if (error)
- return error;
+ if (preload)
+ idr_preload_end();
+ if (ret < 0)
+ return ret;
- asoc->assoc_id = (sctp_assoc_t) assoc_id;
- return error;
+ asoc->assoc_id = (sctp_assoc_t)ret;
+ return 0;
}
/* Free the ASCONF queue */