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infiniband: i40iw: Replace GFP_ATOMIC with GFP_KERNEL in i40iw_add_mqh_4

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i40iw_add_mqh_4() is never called in atomic context, because it
calls rtnl_lock() that can sleep.

Despite never getting called from atomic context,
i40iw_add_mqh_4() calls kzalloc() with GFP_ATOMIC,
which does not sleep for allocation.
GFP_ATOMIC is not necessary and can be replaced with GFP_KERNEL,
which can sleep and improve the possibility of sucessful allocation.

This is found by a static analysis tool named DCNS written by myself.
And I also manually check it.

Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Acked-by: Shiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Jia-Ju Bai 2018-04-11 15:32:25 +08:00 committed by Jason Gunthorpe
parent 76be04500b
commit 39e487faaf
1 changed files with 1 additions and 1 deletions
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2
drivers/infiniband/hw/i40iw/i40iw_cm.c
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@ -1788,7 +1788,7 @@ static enum i40iw_status_code i40iw_add_mqh_4(
&ifa->ifa_address,
rdma_vlan_dev_vlan_id(dev),
dev->dev_addr);
child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_ATOMIC);
child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_KERNEL);
cm_parent_listen_node->cm_core->stats_listen_nodes_created++;
i40iw_debug(&iwdev->sc_dev,
I40IW_DEBUG_CM,