提交 82edcc75 编写于 作者: J Jia-Ju Bai 提交者: Jon Mason

ntb: ntb_transport: Replace GFP_ATOMIC with GFP_KERNEL in ntb_transport_setup_qp_mw

ntb_transport_setup_qp_mw() is never called in atomic context.

ntb_transport_setup_qp_mw() is only called by ntb_transport_link_work(),
which is set as a parameter of INIT_DELAYED_WORK()
in ntb_transport_probe().

Despite never getting called from atomic context,
ntb_transport_setup_qp_mw() calls kzalloc_node() 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: NJia-Ju Bai <baijiaju1990@gmail.com>
Signed-off-by: NJon Mason <jdmason@kudzu.us>
上级 081a6986
......@@ -637,7 +637,7 @@ static int ntb_transport_setup_qp_mw(struct ntb_transport_ctx *nt,
*/
node = dev_to_node(&ndev->dev);
for (i = qp->rx_alloc_entry; i < qp->rx_max_entry; i++) {
entry = kzalloc_node(sizeof(*entry), GFP_ATOMIC, node);
entry = kzalloc_node(sizeof(*entry), GFP_KERNEL, node);
if (!entry)
return -ENOMEM;
......
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