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authorJia-Ju Bai <baijiaju1990@gmail.com>2018-04-10 16:17:54 +0300
committerJon Mason <jdmason@kudzu.us>2018-06-11 22:20:59 +0300
commitc9160b69258ef46ab62c27a09decb8fef311e700 (patch)
tree63e07b5afa240a6bd9201760cfa88fd3734bff25 /drivers/ntb
parent82edcc758f273ed3afd308746dd69376d5b1024d (diff)
downloadlinux-c9160b69258ef46ab62c27a09decb8fef311e700.tar.xz
ntb: ntb_transport: Replace GFP_ATOMIC with GFP_KERNEL in ntb_transport_create_queue
ntb_transport_create_queue() is never called in atomic context. ntb_transport_create_queue() is only called by ntb_netdev_probe(), which is set as ".probe" in struct ntb_transport_client. Despite never getting called from atomic context, ntb_transport_create_queue() 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: Jia-Ju Bai <baijiaju1990@gmail.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
Diffstat (limited to 'drivers/ntb')
-rw-r--r--drivers/ntb/ntb_transport.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/ntb/ntb_transport.c b/drivers/ntb/ntb_transport.c
index c848fb3d5099..8145be34328b 100644
--- a/drivers/ntb/ntb_transport.c
+++ b/drivers/ntb/ntb_transport.c
@@ -1828,7 +1828,7 @@ ntb_transport_create_queue(void *data, struct device *client_dev,
qp->rx_dma_chan ? "DMA" : "CPU");
for (i = 0; i < NTB_QP_DEF_NUM_ENTRIES; i++) {
- entry = kzalloc_node(sizeof(*entry), GFP_ATOMIC, node);
+ entry = kzalloc_node(sizeof(*entry), GFP_KERNEL, node);
if (!entry)
goto err1;
@@ -1839,7 +1839,7 @@ ntb_transport_create_queue(void *data, struct device *client_dev,
qp->rx_alloc_entry = NTB_QP_DEF_NUM_ENTRIES;
for (i = 0; i < qp->tx_max_entry; i++) {
- entry = kzalloc_node(sizeof(*entry), GFP_ATOMIC, node);
+ entry = kzalloc_node(sizeof(*entry), GFP_KERNEL, node);
if (!entry)
goto err2;