[PATCH 4.9 095/177] IB/rdmavt: restore IRQs on error path in rvt_create_ah()

[Greg Kroah-Hartman]

4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Dan Carpenter <dan.carpen...@oracle.com>


[ Upstream commit f0bb2d44ca26b7090dc7bade8877b77005f07dfc ]

We need to call spin_unlock_irqrestore() instead of vanilla
spin_unlock() on this error path.

Fixes: 119a8e708d16 ("IB/rdmavt: Add AH to rdmavt")
Signed-off-by: Dan Carpenter <dan.carpen...@oracle.com>
Reviewed-by: Leon Romanovsky <leo...@mellanox.com>
Acked-by: Dennis Dalessandro <dennis.dalessan...@intel.com>
Signed-off-by: Doug Ledford <dledf...@redhat.com>
Signed-off-by: Sasha Levin <alexander.le...@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
 drivers/infiniband/sw/rdmavt/ah.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/infiniband/sw/rdmavt/ah.c
+++ b/drivers/infiniband/sw/rdmavt/ah.c
@@ -119,7 +119,7 @@ struct ib_ah *rvt_create_ah(struct ib_pd
 
        spin_lock_irqsave(&dev->n_ahs_lock, flags);
        if (dev->n_ahs_allocated == dev->dparms.props.max_ah) {
-               spin_unlock(&dev->n_ahs_lock);
+               spin_unlock_irqrestore(&dev->n_ahs_lock, flags);
                kfree(ah);
                return ERR_PTR(-ENOMEM);
        }