IB/amso1100: convert to idr_alloc()

Convert to the much saner new idr interface.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Cc: Tom Tucker <tom@opengridcomputing.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 11 insertions, 8 deletions

diff --git a/drivers/infiniband/hw/amso1100/c2_qp.c b/drivers/infiniband/hw/amso1100/c2_qp.c
index 28cd5cb51859..0ab826b280b2 100644
--- a/drivers/infiniband/hw/amso1100/c2_qp.c
+++ b/drivers/infiniband/hw/amso1100/c2_qp.c
@@ -382,14 +382,17 @@ static int c2_alloc_qpn(struct c2_dev *c2dev, struct c2_qp *qp)
 {
         int ret;
 
-        do {
-                spin_lock_irq(&c2dev->qp_table.lock);
-                ret = idr_get_new_above(&c2dev->qp_table.idr, qp,
-                                        c2dev->qp_table.last++, &qp->qpn);
-                spin_unlock_irq(&c2dev->qp_table.lock);
-        } while ((ret == -EAGAIN) &&
-                 idr_pre_get(&c2dev->qp_table.idr, GFP_KERNEL));
-        return ret;
+        idr_preload(GFP_KERNEL);
+        spin_lock_irq(&c2dev->qp_table.lock);
+
+        ret = idr_alloc(&c2dev->qp_table.idr, qp, c2dev->qp_table.last++, 0,
+                        GFP_NOWAIT);
+        if (ret >= 0)
+                qp->qpn = ret;
+
+        spin_unlock_irq(&c2dev->qp_table.lock);
+        idr_preload_end();
+        return ret < 0 ? ret : 0;
 }
 
 static void c2_free_qpn(struct c2_dev *c2dev, int qpn)